Capital Cost Banchmarks

Study on

C it l C t B h k f Di t ib ti Capital Costs Benchmarks for Distribution Business

S b itt d tSubmitted toForum of Regulators (FOR) New Delhi

ADMINISTRATIVE STAFF COLLEGE OF INDIACENTRE FOR INFRASTRUCTURE MANAGEMENT & REGULATORY STUDIESBella Vista :: Hyderabad-500 0822nd March 2010

i

C O N T E N T S

Chapter Title Page 1. Introduction 1

2. Terms of Reference 2

3. Approach and Methodology 5

4. Identification of works, data collection and validation 11 1 Southern Power Distribution Company of Andhra Pradesh

Limited (APSPDCL) 15

2 Central Power Distribution Company of Andhra Pradesh Limited (APCPDCL)

24

3 Tamil Nadu Electricity Board (TNEB) 32 4 Uttar Gujarat Vij Company Limited (UGVCL) 38 5 Madhya Gujarat Vij Company Limited (MGVCL) 42 6 Madhya Pradesh Paschim Kshetra Vidyuth Vitaran Company

Limited (MPPKVVCL), 45

7 Madhya Pradesh Madhya Kshetra Vidyut Vitaran Company Limited (MPMKVVCL),

50

8 Uttarkhand Power Company Limited (UPCL), Dehradun. 54 9 West Bengal State Electricity Distribution Company Limited

(WBSEDCL), 58

10 11

Central Assam Electricity Distribution Company Limited (CAEDCL) Upper Assam Electricity Distribution Company Limited (UAEDCL),

69

12 Southern Electricity Supply Company of Orissa Ltd. (SOUTHCO) 76 13 Central Electricity Supply Utility of Orissa Limited (CESU) 82 14 Punjab State Electricity Board (PSEB) 89 15 BSES Rajadhani Power Limited (BRPL) 94 16 North Delhi Power Limited (NDPL) 99 17 Chhattisgarh State Power Distribution Company (CSPDCL) 103 18 Maharastra State Electricity Distribution Company Limited 108

5. Cost analysis and Cost Benchmarks 114 6. Analysis of the Increase in Capital Costs and Correlation with

the Relevant Index of Industrial Production. 168

7. Summary, Conclusions, and Suggestions/Recommendations 203

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L I S T O F T A B L E S

1. Southern Power Distribution Company of Andhra Pradesh Limited (APSPDCL)

Table No. Title Page No. 4.1 Costs of 33 kV lines 16 4.2 Costs of 11 kV Lines 16 4.3 Cost of LT Lines 18 4.4 Conversion Costs of HVDS 19 4.5 Conversion Costs of HVDS, replacing different capacities of

existing Transformers 19

4.6 Costs at 33/11 kV substations (Outdoor) 21

4.7 Cost of Distribution Transformers Stations 22 4.8 Costs of Metering Sets and Meters 22 4.9 Service Line Costs 23

2. Central Power Distribution Company of Andhra Pradesh Limited (APCPDCL)

4.10 Costs of 33 kV lines (Overhead) 25 4.11 Costs of 33kV Underground Cable System 25 4.12 Costs of 11 kV Overhead Lines 26 4.13 Costs of 11kV Underground Cable Feeders 26 4.14 Costs of LT Overhead Lines 27 4.15 Costs of Underground Cable System 28 4.16 Costs of 33/11 kV Substation (Outdoor) 28 4.17 Break-up Costs for 33/11 kV Substations 29 4.18 Cost of Substations (Indoor) 30 4.19 Cost of Distribution Transformers Stations 31 4.20 Costs of Metering Equipment and Meters 31 4.21 Service Line Costs 31

3. Tamil Nadu Electricity Board (TNEB)

4.22 Costs of 33 kV lines 32 4.23 Cost of 33 kV Underground Cable System 32 4.24 Costs of 11 kV Lines 33 4.25 Costs of 11kV Underground Cable System 33 4.26 Costs of LT overhead lines (Outdoor) 34 4.27 Costs of LT Underground System 34 4.28 Break-up costs of 33/11 kV substations with break up details 35 4.29 Cost of Distribution Transformers Stations 36 4.30 Costs of Metering Equipment and Meters 37 4.31 Service Line Costs 37

4. Uttar Gujarat Vij Company Limited (UGVCL)

4.32 Cost of 22kV and 11 kV Lines 38 4.33 Costs of LT lines (Overhead) 39 4.34 Costs of Distribution Transformer stations 40 4.35 Cost of Metering Equipment 40 4.36 Service Line costs 41

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5. Madhya Gujarat Vij Company Limited (MGVCL)

4.37 Costs of 11 kV Lines (Overhead) 42 4.38 Costs of 11 kV Underground System 42 4.39 Costs of LT Overhead lines 43 4.40 Cost of Distribution Transformer Stations (Outdoor) 44 4.41 Costs of Metering Equipment and Meters 44 4.42 Service Line Costs 44

6. Madhya Pradesh Paschima Kshetra Vidyuth Vitaran Company Limited

(MPPKVVCL), Indore

4.43 Costs of 33 kV lines (Overhead) 45 4.44 Cost of 11 kV lines (Overhead) 45 4.45 Costs of LT Lines (Overhead) 46 4.46 Conversion costs of HVDS Scheme 46 4.47 Costs of HVDS (Conversion of LT to 11 kV line etc.) 47 4.48 Break-up Costs of 33/11 kV substations 48 4.49 Costs of 11 kV/0.4 kV DTR stations 49 4.50 Metering Equipment and Meters 49

7. Madhya Pradesh Madhya Kshetra Vidyuth Vitaran Company Limited (MPMKVVCL), Bhopal

4.51 Costs of 33 kV Lines (Overhead) 50 4.52 Cost of 11 kV Lines (Overhead) 50 4.53 Costs of LT Lines (overhead) 51 4.54 Cost of HVDS (Conversion of LT to 11 kV line etc.) 52 4.55 Break-up Costs of 33/11 kV substations (Outdoor) 52 4.56 Costs of Distribution transformer Stations (Outdoor) 53

8. Uttarkhand Power Company Limited (UPCL)

4.57 Costs of 33kV line (Overhead) 54 4.58 Costs of 11 kV Line 54 4.59 Cost of 11 kV UG Cable System 55 4.60 Costs of LT Lines 55 4.61 Costs of LT AB Cable Lines 55 4.62 Break-up costs of 33/11 KV Substations 56 4.63 Costs of Distribution Transformer Stations (Outdoor) 57 4.64 Cost of Metering equipment and Meters 57

9. West Bengal State Electricity Distribution Company Limited (WBSEDCL)

4.65 Costs of 33kV lines 59 4.66 Costs as per Turn Key Contracts 60 4.67 Costs of 11kV lines 61 4.68 11kV line with 50Sq mm² ACSR 61 4.69 Costs of LT lines 63 4.70 LT 3Ph 4wire line with 25Sq mm² AAAC 63 4.71 33/11kV substation costs 64 4.72 Costs break up of 33/11kV substation 65 4.73 33/11kV substation costs with 2X3.15 MVA transformers on

turnkey contracts 65

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4.74 Costs of distribution transformer stations 66 4.75 Costs of distribution transformer stations 66 4.76 Costs of Metering equipment and meters 67 4.77 Service Line Costs 67

10. Central Assam Electricity Distribution Company Limited (CAEDCL) 11. Upper Assam Electricity Distribution Company Limited (UAEDCL)

4.78 Costs of 33kV line 70 4.79 Costs of 11kV lines 71 4.80 Costs of LT lines 72 4.81 33 / 11kV substation costs 73 4.82 Costs of distribution transformer stations 74 4.83 Costs of metering sets and meters 74 4.84 Service lines costs 75

12. Southern Electricity Supply Company of Orissa Limited (SOUTHCO)

4.85 Costs of 33 kV lines (Overhead) 77 4.86 Costs of 11 kV Overhead Lines 77 4.87 Costs of LT Overhead Lines 78 4.88 Costs of 33/11 kV Substation (Outdoor) 79 4.89 Break-up Costs for 33/11 kV Substations 80 4.90 Costs of Distribution Transformers Stations 81 4.91 Cost of Metering Equipment and Meters 81 4.92 Service Line Costs 81

13. Central Electricity Supply Utility of Orissa (CESU)

4.93 Costs of 33 kV lines (Overhead) 83 4.94 Costs of Underground Cable system 83 4.95 Costs of 11 kV Overhead Lines 84 4.96 Costs of LT Overhead Lines 85 4.97 Costs of 33/11 kV Substation (Outdoor) 85 4.98 Break-up Costs for 33/11 kV Substations 86 4.99 Costs of Distribution Transformer Stations 87

4.100 Cost of Metering Equipment and Meters 87 4.101 Service Line Costs 88

14. Punjab State Electricity Board (PSEB)

4.102 Costs of 66 kV lines (Overhead) 89 4.103 Cost of 11 kV Overhead Lines 90 4.104 Cost of LT lines (Overhead) 90 4.105 Costs of 66/11 kV Sub-Stations (Outdoor) 91 4.106 Costs of Distribution Transformer Stations (Outdoor) 92 4.107 Cost of Metering Equipment and Meters 92 4.108 Service Line Costs 93

15. BSES Rajadhani Power Limited (BRPL)

4.109 Cost of 66 kV UG cable lines 94 4.110 Cost of 33 kV UG cable line 95

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4.111 Cost of 11 kV lines (Overhead) 95 4.112 Cost of 11 kV UG cable line 95 4.113 Cost of LT Overhead Line 96 4.114 Cost of LT UG Cable Line 96 4.115 Cost of 66/11 kV and 33/11 kV Sub-Stations 97 4.116 Costs of Distribution Transformer Stations 97 4.117 Service Line Costs 98

16. North Delhi Power Limited (NDPL)

4.118 Cost of 66 kV UG Cable Line 99 4.119 Cost of 33 kV UG Cable Line 100 4.120 Cost of 11 kV Lines (Overhead) 100 4.121 Cost of 11 kV UG Cable Line 100 4.122 Cost of LT Overhead Line 101 4.123 Cost of 66/11kV Substations 101 4.124 Costs of Distribution Transformer Stations 102 4.125 Costs of Metering sets and Meters 102 4.126 Service Line Costs 102

17. Chhattisgarh State Power Distribution Company Limited (CSPDCL)

4.127 Costs of 33 kV Lines 104 4.128 Costs of 11 kV Lines 104 4.129 Costs of LT Lines 105 4.130 Costs of 33/11 kV Sub-Stations 106 4.131 Costs break-up of 33/11 kV Sub-Stations 106 4.132 Costs of Distribution Transformer Stations 106 4.133 Costs of Metering Equipment and Meters 107

18. (A) Maharashtra State Electricity Distribution Company Limited

4.134 Costs of 33 kV Lines 108 4.135 Cost of 11 kV Lines 1084.136 Costs of LT Lines 1094.137 Cost of Laying 33 kV UG cable Lines 109 4.138 Cost of Laying 11 kV UG cable Line 110 4.139 Costs of 33/11 kV Sub-Stations 110 4.140 Cost of Distribution Transformer Stations 111 4.141 Costs of Metering Equipment and Meters 111

(B) Tata Power Company Limited

4.142 Cost of 33/11 kV Sub-Station 111 4.143 Cost of 33 kV under Ground Cable system 112 4.144 Cost of 11 kV under Ground Cable system 112 4.145 Cost of Distribution Transformer Stations 112 4.146 Cost of Metering Equipment and Meters 112

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(C) BEST Limited

4.147 Cost of 33/11 kV Sub-Station 1134.148 Costs of 33 kV under Ground Cable system 113 4.149 Costs of 11 kV under Ground Cable system 113 4.150 Costs of Distribution Transformer Stations 113

5.1 33 kV Line with different sizes of conductors, type of

supports and span lengths 116

5.2 Comparative costs of 33 kV over head line with different conductor sizes, supports at different span lengths

117

5.1(a) Costs of 33kV under ground system 118 5.3 11 kV Line with different sizes of conductors, type of supports

and span lengths 120

5.4 Comparative costs of 11 kV overhead line with different conductor sizes, supports at different span lengths

122

5.4 (Contd.)

Comparative costs of 11 kV overhead line with different conductor sizes, supports at different span lengths

123

5.3 (a) Costs of 11 kV Underground System 124 5.5 LT Line with different sizes of conductors, type of supports and

span lengths 126

5.6 Comparative costs of LT overhead line with different conductor sizes, supports at different span lengths

129

5.6 (contd.)

Comparative costs of LT overhead line with different conductor sizes, supports at different span lengths

130

5.6 (a) Costs of LT Underground System 131 5.7 66/11kV and 33/11 kV Substations (Outdoor) 135 5.8 Costs of 33/11 kV Substation (Outdoor) 136 5.8

(contd.) Costs of 33/11 kV Substation (Outdoor) 137

5.9 33/11 kV Substations (Indoor) 138 5.10 Costs of 33/11 kV Substation (Indoor) 139 5.11 Distribution Transformer Stations (Outdoor) 140 5.12 Distribution Transformer stations (Outdoor) 143 5.13 Conversion cost of HVDS 144 5.14 Conversion costs of HVDS, replacing different capacities of

existing transformers 145

5.15 Cost of Metering Equipment and Meters 1485.16 Service Line costs 149 5.17 Overhead costs adopted by various utilities 150 6.1 Composite Price Index number – Capital Costs / Km of 33 kV

Line with RCC / PSCC poles 171

6.2 Capital Costs of 33 kV line 171 6.3 Estimated Benchmark Costs for 2009-10 176

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A N N E X U R E S

Annexure Title Page 3.1 Details of State Electricity Boards and Utilities where the study is

conducted 9

3.2 Details of the Members of the Study team 10

5.1 Standard Cost Estimate per km of 33 kV line with 100 Sq.mm AAA Conductor Over 9.1 Mts. PSCC Poles at 65 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 280 kgs at the rates ruling during 2008-09

152

5.2 Standard Cost Estimate per km of 11 kV line with 55 Sq.mm AAA Conductor Over 8 Mts. PSCC Poles at 60 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 140 kgs at the rates ruling during 2008-09

153

5.3 Standard Cost Estimate per km of LT 3- Ph 5 wire line (Horizontal formation) 3x55 Sq.mm + 2 x34 Sq.mm AAA Conductor Over 8 Mts. PSCC Poles at 65 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 140 kgs at the rates ruling during 2008-09

154

5.4 Standard cost estimate for 100KVA distribution transformer station at the rates ruling during 2008-09

155

5.5 (a) Detailed Estimate For Erection of 33/11 kV Sub-Station with 2 x 5 MVA Power Transformers and NF = 4 Nos. 11 kV Feeders

156

5.5 (b) Typical layout of 33/11 kV substation with 2x5 MVA power Transformers and with capacitor bank

157

5.6 (a) Standard cost estimate for domestic, non-domestic, single phase service connection

158

5.6 (b) Standard cost estimate for three phase domestic, non-domestic service connection

159

5.6 (c) Standard cost estimate for three phase industrial service upto 20HP

160

5.6 (d) Standard cost estimate for three phase industrial service above 20HP

161

5.6 (e) Standard cost estimate for street light service connection 162 5.6 (f) Standard cost estimate for agricultural service connection 163 5.6 (g) Standard arrangement for single phase service connection 164 5.6 (h) Standard arrangement for three phase industrial service

connection with bare wires. 165

5.6 (i) Standard arrangement for three phase industrial service connection with insulated wires.

166

5.6 (j) Standard arrangement for three phase agricultural service connection

167

6.1 Composite Price Index numbers for different elements in Distribution Business

178

6.2(a) Arriving at the caital cost ranges for the year 2004-05. 196

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6.2(b) Arriving at the capital cost ranges for the year 2005-06 197

6.2(c) Arriving at the capital cost ranges for the year 2006-07 198

6.2(d) Arriving at the capital cost ranges for the year 2007-08 199

6.2(e) Arriving at the capital cost ranges for the year 2008-09 200

6.2(f) Year-wise Benchmark capital costs from 2004-05 to 2008-09 201

6.3 Model for arriving at Benchmark capital cost of different elements of distribution business correlating to Composite Price Index Numbers

202

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G L O S S A R Y

APSPDCL : Southern Power Distribution Company of Andhra Pradesh Limited

APCPDCL : Central Power Distribution Company of Andhra Pradesh Limited

TNEB : Tamil Nadu Electricity Board

MGVCL : Madhya Gujarat Vij Company Limited

UGVCL : Uttar Gujarat Vij Company Limited

MPMKVVCL : Madhya Pradesh Madhya Kshetra Vidyuth Vitaran Company Limited

MPPKVVCL : Madhya Pradesh Paschim Kshetra Vidyuth Vitaran Company Limited

WBSEDCL : West Bengal State Electricity Distribution Company Limited

CESU : Central Electricity Supply Utility of Orissa Limited

SOUTHCO : Southern Electricity Supply Company of Orissa Limited

PSEB : Punjab State Electricity Board

NDPL : North Delhi Power Limited

BRPL : BSES Rajadhani Power Limited

UPCL : Uttarkhand Power Corporation Limited

CAEDCL : Central Assam Electricity Distribution Company Limited

UAEDCL : Upper Assam Electricity Distribution Company Limited

CSPDCL : Chhattisgarh State Power Distribution Company Limited

AAAC : All Aluminium Alloy Conductor

ACSR : Aluminium Conductor Steel Reinforced

PSCC : Pre stressed Cement Concrete

RCC : Reinforced Cement Concrete

HVDS : High Voltage Distribution System

1

1. Introduction 1.1 Background

1.1 The Tariff Policy issued by the Ministry of Power, Government of India on January 6,

2006, stipulates as follows:

“5.0 General Approach to Tariff

5.3 Tariff Policy lays down following framework for performance based cost to

service regulation in respect of aspects common to generation, transmission as well

as distribution………

(a) Return on Investment “while allowing the total capital cost of the project, the Appropriate commission would

ensure that these are reasonable and to achieve this objective, requisite benchmarks

on capital costs should be evolved by the Regulatory Commission”.

A Working Group of FOR Members was formed in June 2008, on MYT Framework

for Distribution Business and Distribution Margin. The Working Group had decided

that a study should be conducted to evolve benchmarks for capital costs in

distribution business, since capital costs would be the basis of cost plus tariff and

prudent check of the capital expenditure incurred by the distribution licensee is

essential. Such a benchmarking exercise would facilitate the capital expenditure

approach process being undertaken by the State Electricity Regulatory Commissions

(SERCs) as well as to ensure that only reasonable capital costs are allowed to be

considered for the purpose of approval of ARR and determination of tariff.

It is in this background that the Forum of Regulators (FOR) intended to get a study

conducted for “Capital Cost Benchmarks for Distribution Business” across different

States in the country. The study was entrusted to Administrative Staff College of

India (ASCI), Hyderabad.

2

2. Terms of Reference

2.1 Objective of the Study

To develop benchmarks for capital costs of key elements of the distribution business,

by analysing the data from various power utilities in all the five regions in the country

with clear distinction between capital costs incurred in –

• Rural Distribution Network.

• Urban Distribution Network

• Overhead system

• Underground system

To develop the capital cost benchmarks, the following key components of the

distribution provide guiding principles for approval of capital cost of distribution

business.

• Distribution feeder lines – 33 kV, 22 kV, 11 kV overhead and underground.

• Receiving sub-stations (Indoor and Outdoor type) with 3.15 MVA, 5 MVA, 16

MVA, 20 MVA etc power transformers including civil works, switchgear, lightening

arrestors, capacitors banks etc.

66 kV is also considered under distribution in the case of Delhi where Distribution

Utilities manage 66 kV. In the case of Punjab, the SEB is an integrated utility and

does not have 33 kV voltage. Hence 66 kV is also considered as distribution

voltage.

There is no 33 kV network under distribution in Gujarat and the substations are

66/11 kV, which are under transmission utility’s control. The DISCOMs have only

11 kV and LT network.

3

• Distribution transformer stations (Indoor and Outdoor) including that of use of

Amorphous core distribution transformers with 25 kVA, 63 kVA, 100 kVA,

200/250 kVA, 315 kVA, 500 kVA, 1000 kVA, 2000 kVA etc.

Implication of BEE Energy Efficiency star rating should also be considered.

• Metering equipment including meters of all types CT, PT sets etc.

• LT network (overhead) including poles, conductor and other accessories such as

insulators, clamps, connectors etc.

• LT network (underground) including cable, LT feeder pillars / mini pillars etc.

• Service lines.

• To identify cost escalation factors that would impact the capital cost of distribution

system components.

• To develop a system for updating the benchmarks for capital cost on year to year

basis with minimum requirement of additional data.

• To suggest norms for other cost overheads such as labour charges,

transportation, supervision, contingencies etc., which are normally considered

while determining capital cost.

2.2 Scope of Work

The scope of work for the study includes –

• Developing benchmarks and appropriate escalation indices for capital costs of

key elements of distribution network – based on the study and analysis of the

following aspects:

• Creation of database of actual capital costs in distribution business by compiling

data of different State Electricity Boards, Government owned Corporations /

Companies, private sector licensees such that data is captured for at least ten

different states in the country. The capital cost data has to be recent i.e. as

incurred in the last two years.

• Analysis of the above data base for determination of benchmark capital cost for

main items of capital expenditure in distribution business with clear distinction

between capital costs incurred in -

- Overhead systems

- Underground systems

- Rural distribution networks

- Urban distribution networks

4

• The cost of erection, testing, commissioning and other incidental expenses

including site preparation, site supervision etc., shall be factored into the capital

cost of key components of the distribution business.

• Study of typical gestation period for distribution system capital expenditure and

share of interest during construction in completed capital cost in the distribution

business.

• Suggest as to whether there is a need for state specific adjustments in the above

determined benchmarks capital costs? Identification of the specific needs of

capital expenditure that could require adjustments to meet specific requirements.

• Analysis of the increase in capital cost over the last five-years and correlation

with the index in engineering goods and any other relevant index of industrial

production.

• Design of a cost – indexation formula that can be validated using data of previous

years and incorporated in the model.

• Creation of a model for self-validation of the capital cost benchmarks, so that the

benchmarks are automatically revised as data of new projects gets added to the

database.

5

3. Approach and Methodology 3.1 This chapter details out the methodology that ASCI adapted to carryout the terms of

reference of the assignment and the scope of work.

3.2 Identification of States / Utilities for the Study

As per the scope of work the data for the study has to be captured for at least ten

(10) states. The states and the utilities in each of the States have been identified in

consultation with FOR Secretariat. The study covers two States in Southern Region,

two in Western Region, three in Northern Region, two in Eastern Region and one in

North Eastern Region. Wherever the State Electricity Boards have been restructured

two of the restructured entities (Distribution Companies) have been identified. The

data for the study is captured from two State Electricity Boards and fourteen

Distribution Companies in eight States of which ten are State owned and four are

private utilities. The details of State Electricity Boards and utilities where the study is

conducted are given in Annexure-3.1.

3.3 Methodology

The study required extensive data collection on various components of Distribution

business as listed under terms of reference / scope of works which includes:

• Costs of various components in Distribution business.

• Evaluation of data.

• Benchmarking costs of various components of distribution system.

• Data on procurement costs etc., of various equipment / material to arrive at price

escalation.

• Data on price indices.

• Design of cost indexation formula.

• Creation of a model for self validation of the cost benchmarks etc.

6

3.4 Collection of Data

The first step in carrying out the study is data collection from the identified sixteen

utilities. As mentioned earlier the study required collection of extensive data on

various components etc., of Distribution Business from various State Electricity

Boards and Utilities listed in Annexure-3.1

ASCI, the consultant have developed a number of formats for collection of data

required to benchmark the capital costs of various components of Distribution

Business and other requirements under the study and furnished to FOR Secretariat

on 5th February 2009 for due verification and to communicate to utilities to make the

data available as required in the formats. The FOR Secretariat has communicated

the formats to the Secretaries, State Electricity Regulatory Commissions and the

Utilities to make the data available to ASCI for the study vide letter No.15/2(7)/2008-

FOR/Study/CC dated 16th February 2009.

The data requirements as detailed in the formats include:

• Cost of procurement of various equipment / material over the last 5 years (2003-

04 to 2007-08).

• Cost of 33/11 kV sub-stations (indoor and outdoor type) over the last two years

with power transformers of different capacities as executed.

• Cost per km of 33 kV overhead line and underground cable as executed.

• Cost per km of 11 kV overhead line and underground cable as executed.

• Cost of erection of Distribution transformers with different capacities indoor and

outdoor as executed.

• Cost per km of LT overhead lines and underground cable.

It is considered that further data / information required could be collected during the

visits of ASCI Consultants to various utilities.

3.5 Process Analysis

The costs obtained for elements of Distribution Business are analysed and observed

that the utilities prepared cost data for various works and updated it on yearly basis

based on input costs or increase by certain percentage. The cost data prepared is

used for preparation of estimates and award of contracts, particularly turnkey /

partially turnkey contracts.

7

But the costs as executed are not available in complete shape in a number of utilities.

In most of the cases, the completion costs are not finalised. Even in the case of

works where accounts are finalised, the costs of some items are missing. In some

cases, particularly in substation costs, released transformer from some other station

is installed and the cost of released transformer is taken, this completion cost cannot

be considered for benchmarking. In some cases a work order was issued for a

scheme, which includes 33 / 11 kV substation, connected 33 kV line and 11 kV lines

where the cost of substation has to be segregated. In some cases the cost of

overheads is not added to completion cost. As such the so-called cost as executed

obtained / collected could not be considered as costs as executed. The consultants

have validated the data by adding the cost of missing items and updating the costs in

some cases.

This had to be done in quite a number of cases to have a fairly realistic cost and it

took considerable time.

ASCI consultants had to visit the utilities and sit with the concerned officers and

obtain / collect data and even then complete data is not available. The consultants

have visited the utilities twice. Apart from these visits, ASCI had closely followed up

with the distribution companies and obtained the data.

Though Chhattisgarh and Maharashtra are not included in the identified states, the

Chhattisgarh State Electricity Regulatory Commission and Maharashtra Electricity

Regulatory Commission have obtained and furnished some data from the distribution

utilities in the respective State. This data is also considered in the study.

3.6 Study Team

ASCI has organised a team of Senior Engineers who are conversant with Distribution

Management to visit utilities in various States to discuss with the concerned

engineers in the utilities and collect the data and analyse. The team visited the

utilities in all the States listed for this study. The details of the members of the study

team are given in Annexure-3.2

The core team in ASCI has analysed the data collected, validated / evaluated to

arrive at benchmark costs and draft the report.

8

3.7 Final Report

Based on the data obtained / collected from the utilities, a draft report is prepared

and a presentation was made to the Forum Secretariat on 18th September 2009.

Certain suggestions were made during the presentation, which were incorporated

and a draft final report was submitted on 19th October 2009. A presentation was

made on the draft final report to the Forum of Regulators at Lucknow on 1st February

2010. The final report is finalised based on the comments and suggestions made

during this meeting.

The Report covers the study on “Capital Cost Benchmarks for Distribution Business” as detailed below:

1. Introduction

2. Terms of Reference

3. Approach and Methodology

4. Identification of Works, Data collection and Validation

5. Cost Analysis and Cost Benchmarks

6. Analysis of the Increase in Capital Costs and Correlation with the Relevant Index

of Industrial Production

7. Summary, Conclusion and Recommendations

9

Annexure-3. 1

Details of State Electricity Boards and Utilities where the Study is conducted

S.N Name of the State Electricity Board / Utilities Region

1. Central Power Distribution Company of Andhra Pradesh Limited (APCPDCL), Hyderabad.

Southern

2. Southern Power Distribution Company of Andhra Pradesh Limited (APSPDCL), Tirupati.

Southern

3. Tamil Nadu State Electricity Board (TNEB), Chennai. Southern4. Madhya Gujarat Vij Company Limited, (MGVCL), Vadodara,

Gujarat Western

5. Uttar Gujarat Vij Company Limited, (UGVCL), Mehsana, Gujarat Western6. Madhya Pradesh Paschim Kshetra Vidyut Vitaran Company

Limited, (MPPKVVCL), Indore, Madhya Pradesh. Western

7. Madhya Pradesh Madhya Kshetra Vidyut Vitaran Company Limited, (MKVVCL), Bhopal, Madhya Pradesh.

Western

8. West Bengal State Electricity Distribution Company Limited, (WBSEDCL), Kolkata.

Eastern

9. Central Electricity Supply Utility, (CESU), Bhubaneswar, Orissa. Eastern 10. South Electricity Supply Company, (SOUTHCO), Behrampur,

Orissa. Eastern

11. Punjab State Electricity Board (PSEB), Patiala. Northern

12. North Delhi Power Limited (NDPL), New Delhi. Northern

13. BSES Rajdhani Power Limited (BRPL), New Delhi. Northern 14. Uttarakhand State Electricity Distribution Company Ltd.

(USEDCL), Dehradun Northern

15. Central Assam Electricity Distribution Company Limited, (CAEDCL), Guwahati.

North Eastern

16. Upper Assam Electricity Distribution Company Limited, (UAEDCL), Guwahati.

North Eastern

10

Annexure-3.2

Details of the members of the study team

The team members except Dr. Usha Ramachandra had worked earlier in Andhra

Pradesh power sector in different capacities in Distribution Management. Dr Usha

Ramachandra is Senior Faculty of ASCI.

S.N Name of the Members Position

1. K Balarama Reddi Team Leader

2. Dr. Usha Ramachandra Team Member

3. T. Ramalinga Reddy Team Member

4. P Subbarami Reddy Team Member

5. J V S N Murthy Team Member

6. K. Bhaskara Reddy Team Member

7. Y Satyanarayana Team Member

8. M Sivarami Reddy Team Member

9. G Subba Raju Team Member

10. P. Raja Rajeswar Team Member

11

4. Identification of Works, Data Collection and

Validation 4.1 Identification of Works

As per the terms of reference, the costs of certain elements in the Distribution

Business have to be benchmarked. The elements for which cost benchmarks have

to be developed in the Distribution Business are as under:

(i) Distribution feeder lines:

33 kV, 22 kV and 11 kV – Overhead and Underground.

66 kV-Overhead and underground, where 66 kV system is managed by the

distribution utilities.

(ii) Receiving Stations (substations) – 33 kV and 66 kV (Outdoor and Indoor) with

transformer capacities of 1.6 MVA, 3.15 MVA, 5 MVA, 8 MVA, 10 MVA, 16

MVA, 20 MVA etc., including civil works, switch gear, lightening arrestors,

capacitor banks etc.

(iii) Distribution Transformer Substations (Indoor and Outdoor)

With transformer capacities of 25 kVA, 63 kVA, 100 kVA, 200 kVA, 315 kVA

500 kVA 1000 kVA, 1600 kVA and 2000 kVA etc.

The transformers may include Amorphous core distribution transformers and

BEE energy efficiency star rating transformers.

(iv) Metering equipment, including meters of all types CT, PT sets etc.

(v) LT Network (underground) including cable, LT feeder pillars / mini pillars etc.

(vi) LT Network (overhead) including poles, conductor and other accessories, such

as insulators, clamps, connectors etc.

(vii) Service Lines.

The capital cost to have clear distinction between Urban and Rural distribution

network.

4.2 Data Collection

Collection of data from all the sixteen utilities (Electricity Boards and Distribution

Companies) is a major task in the study to Benchmark the costs of various elements

in the Distribution Business listed in para 4.1 above.

12

4.2.1 Data Formats

ASCI had developed formats for the collection of data required in line with the

objectives of the study and scope of work.

The formats have been designed to capture data for a five year period (2003-04 to

2007-08), wherever available the data is collected for 2008-09 also.

The data to be collected includes:

• Procurement cost of all major equipment / materials required for distribution

business.

• Cost of 66/11 kV or 33 / 11 kV substations (Receiving Stations) – Specifying the

number and capacity of power transformers and 11 kV outgoing feeders (outdoor

and indoor type).

• Cost of 66 kV/33 kV line/Km indicating size of conductors, type of supports used.

• Cost of 33 kV feeder with underground cable / km.

• Cost of 11 kV line / Km indicating the size of conductors and the supports used

for the line.

• Cost of 11 kV feeder with underground (UG) cable / Km – indicating the size of

the cable used.

• Cost of installation of Distribution transformer stations with different capacities of

distribution transformers including the cost of transformer structure, isolators,

LAS, cabling etc.

• Cost of LT line / km indicating size of conductors and type of supports.

• Cost of LT UG cable feeder / km – indicating the size of the cable used.

• Cost of metering equipment, meters etc.

• Cost of service line.

As indicated in the scope of work, the capital cost data of the years 2006-07 and

2007-08 (2008-09 where available) is utilised to benchmark the capital costs. The

costs for a five year period is utilised to arrive at the increase in capital cost to

correlate with the index for engineering goods / industrial products.

Formats have been communicated to all the utilities, respective State Electricity

Regulatory Commissions and ASCI by the FOR Secretariat with a request to furnish

the data as required in the formats. The response was not that encouraging, ASCI

consultants have visited all the utilities once or twice to explain to the concerned the

13

purpose of the data etc., and sat with the concerned Engineers, assisted them in

filling the formats and collected the data to the extent available and the utilities have

furnished balance data subsequently. The data could be obtained to a large extent

from the utilities by visits of ASCI consultants and close follow up as given below:

(i) Southern Power Distribution Company of Andhra Pradesh Limited

(APSPDCL) – Tirupati.

(ii) Central Power Distribution Company of Andhra Pradesh Limited (APCPDCL),

Hyderabad.

(iii) Tamil Nadu Electricity Board (TNEB), Chennai.

(iv) Madhya Gujarat Viz Company Limited (MGVCL), Vadodara.

(v) Uttar Gujarat Viz Company Limited (UGVCL), Mehsana.

(vi) Madhya Pradesh Paschim Kshetra Vidyuth Vitaran Company Limited

(MPPKVVCL), Indore.

(vii) Madhya Pradesh Madhya Kshetra Vidyut Vitaran Company Limited

(MPMKVVCL), Bhopal.

(viii) West Bengal State Electricity Distribution Company Limited (WBSEDCL),

Kolkata.

(ix) Uttarkhand Power Company Limited (UPCL), Dehradun.

(x) Central Assam Electricity Distribution Company Limited (CAEDCL),

Guwahati.

(xi) Upper Assam Electricity Distribution Company Limited (UAEDCL), Guwahati.

(xii) Central Electricity Supply Utility of Orissa (CESU), Bhubanewsar.

(xiii) Southern Electricity Supply Company of Orissa Limited (SOUTHCO),

Behrampur.

(xiv) Punjab State Electricity Board, Patiala.

(xv) North Delhi Power Limited (NDPL), New Delhi.

(xvi) Brihan Mumbai Subarban Electricity Supply Rajdhani Power Limited, New

Delhi

(xvii) *Chhattisgarh State Distribution Company Limited.

(xviii) *Maharashtra utilities.

*The data from the utilities are obtained and furnished by the respective Regulatory Commission.

14

4.2.2 The Data Collected from various utilities is briefly discussed below:

Wherever consolidated data on the completion cost of a line or substation is not

available, ASCI obtained the issue rate of each equipment / material during the year

for a line / substation and worked out the cost of a line / km or substation etc.

Wherever actual costs are not available for all items, the costs of missing items are

added either from issue rates from stores or from cost estimates. In some cases,

utilities have not taken into account the erection, establishment, transport,

contingencies charges etc. In such cases these costs are added. The data obtained /

collected is validated to arrive at completed cost.

The data obtained / validated from each utility is discussed in this Chapter.

15

1. Southern Power Distribution Company of Andhra

Pradesh Limited (APSPDCL) The utility prepares cost data / cost estimates for various works – substations,

distribution transformer stations, overhead lines etc., every year. The cost data is

updated yearly based on the equipment / material costs procured duly adding the

labour, transport and other establishment charges. The cost data is taken as a basis

for preparation of estimates for various works for award of contracts. Works are

normally executed within the estimated costs.

The works funded by the external agencies like JBIC etc., are awarded for execution

on turnkey basis. Wherever works are awarded on a turnkey basis for substations,

HVDS etc., the bidders are given the estimate prepared based on the cost data and

are required to quote as a percentage of the total estimated cost. The lowest

quotations are usually at the estimated cost in about half of the cases and in others

they are about 1 to 5 percent less or more. Generally the lowest quotations do not

exceed the estimated costs. There is not much difference between the estimated

costs, and the costs as executed, and the executed costs differ from work to work

and place to place; based on the terrain etc.

For the works funded by other agencies, such as, REC etc., the works are awarded

on partial turnkey basis, wherein, major equipment, conductor, etc., are supplied by

the utility and the contractor procures other materials according to specification and

executes the works. The cost estimates, prepared by them on the latest cost data

and works as executed on partial turnkey basis, are verified and found that the

completion costs vary by about + 1 to 10% over the estimated costs. This is mainly

due to variance in procurement costs of some equipment compared to estimate

costs, and due to terrain and other local factors where the material utilised is either

more or less than the estimated quantities.

The costs as obtained / validated for each element of distribution business is

discussed below:

16

(i) 33 kV, 11 kV and LT Lines:

The utility manages only 33 kV, 11 kV and LT network. The construction of the lines

is generally awarded as partial turnkey contracts with the utility supplying all major

material such as conductor, poles etc.

(a) 33 kV Lines: The utility has standardised the construction of 33 kV line with 100 mm2 AAAC on 9.1

meter PSCC poles with 105 meter span in rural areas and 80 meter span in urban

areas.

The cost per km of line as obtained / validated are given in Table-4.1 below:

Table-4.1

Costs of 33 kV lines (Rs. Lakh/km)

Sl. No. Item Costs obtained / validated

2007-08 2008-091 100 mm2 AAAC with 105 meters span 3.49 3.1592 100 mm2 AAAC with 80 meters span 3.592 3.289

(b) 11 kV Lines:

The utility adopted the following norms for construction of 11 kV lines:

11 kV line with (i) 55 mm2 AAAC on 8.0 meter PSCC supports with 60 meter and 65

meter spans and (ii) with 34 mm2 AAAC on 8.0 meter PSCC supports with 60 meter

and 65 meter spans. The line with 65 meter span is most common. The costs as

obtained/ validated are given in Table-4.2 below:

Table-4.2

Costs of 11 kV Lines (Rs. Lakhs/ km)

Sl. No. Item Data as obtained/ validated

2007-08 2008-091 55 mm2 AAAC with 65 meter span 1.670 2.1222 55 mm2 AAAC with 60 meter span 1.698 2.1533 34 mm2 AAAC with 65 meter span 1.489 1.6684 34 mm2 AAAC with 60 meter span 1.519 1.709

11 kV line with 60 meter span is erected in urban areas and 65 meter span in rural

areas.

The conductor size is adopted based on load to be catered.

17

(c) LT System:

The utility adopts the following norms for construction of LT lines.

(i) LT 3 phase 5 wire line with 3x55mm2 + 2x34 mm2 AAAC on 8.0 meter, PSCC

poles with 60 meter and 65 meter spans.

(ii) LT 3 phase 5 wire line with 5x34 mm2 AAAC on 8.0 meter, PSCC poles with 60

meter and 65 meter spans.

(iii) 3 phase 4 wire line with 3x55 mm2 AAAC + 1x34 mm2 AAAC over 8.0 meter,

PSCC poles with 60 meter and 65 meter spans

(iv) 3 phase 4 wire line with 4x34 mm2 AAAC over 8.0 meter, PSCC poles with 60

meter and 65 meter spans.

(v) Single phase 3 wire line with 3x34 mm2 AAAC over 8.0 meter, PSCC poles with

60 meter and 65 meter spans.

(vi) Single phase 2 wire line with 2x34 mm2 AAAC over 8.0 meter, PSCC poles with

60 meter and 65 meter spans.

The usage of the above LT lines is as below:

(i) 3 phase 5 wire with 55 mm2 AAAC conductor

Urban areas for 3 phase supply (4 wires) and for street light supply.

(ii) 3 phase 5 wire with 34 mm2 AAAC conductor

Rural areas for 3 phase supply (4 wires) and for street light supply.

(iii) 3 phase 4 wire with 3x55 mm2 + 34mm2 AAAC conductor

For supply to Agricultural pump sets and other 3 phase loads.

(iv) 3 phase 4 wire with 4x34 mm2 AAAC conductor

For agricultural pumpsets and other 3 phase loads.

(v) LT single phase 3 wire line with 34mm2

For single phase supply for residential and commercial loads with street light supply

(vi) LT single phase 2 wire line with 34 mm2

For single phase supply for residential / commercial loads.

The costs of above LT lines as obtained are given in Table-4.3 below:

18

Table-4.3

Cost of LT Lines

Sl. No.

Details Costs as obtained / validated (Rs. lakhs)

2007-08 2008-09 1 LT 3 phase 5 W line with 3x55 mm2 + 2x34 mm2

AAAC on 8 meter, PSCC poles with 65 meter span 2.031 2.302

2 LT 3 phase 5 W line with 3x55 mm2 + 2x34 mm2 AAAC on 8 meter, PSCC poles with 60 meter span 2.196 2.365

3 LT 3 phase 5 W line with 5x34 mm2 AAAC on 8 meter, PSCC poles with 65 M, span 1.827 1.862

4 LT 3 phase 5 W line with 5x34 mm2 AAAC on 8 meter, PSCC poles with 60 M, span 1.885 1.930

5 LT 3 phase 4 W line with 3x55 mm2 + 1x34 mm2 AAAC on 8 meter PSCC poles with 65 meter span 1.778 2.046

6 LT 3 phase 4 W line with 3x55 mm2 + 1x34 mm2 AAAC on 8 meter, PSCC poles with 60 meter span 1.824 2.099

7 LT 3 phase 4 W line with 4x34 mm2 AAAC on 8 meter, PSCC poles with 65 meter span 1.581 1.611

8 LT 3 phase 4 W line with 4x34 mm2 AAAC on 8 meter, PSCC poles with 60 meter span 1.627 1.667

9 LT Single phase 3 W line with 34 mm2 AAAC on 8 meter, PSCC poles with 65 meter span 1.343 1.370

10 LT Single phase 2 W line with 34 mm2 AAAC on 8 meter, PSCC poles with 60 meter span 1.055 1.071

The benchmark costs for the overhead lines at various voltages are discussed in

chapter-5 after examining the practices / norms adopted in other utilities.

The utility has no underground (UG) cable system of any voltage in its area of

operation.

(ii) High Voltage Distribution System (HVDS)

In APSPDCL, System Improvement Project (SIP) works for conversion of existing LT

network into high voltage distribution system are taken up in large scale. This

conversion of LT network is mostly done in rural areas, feeding agricultural loads.

The costs for these projects, during 2007-08 and 2008-09, which were awarded on

turnkey basis, are given in Table-4.4 below:

19

Table-4.4

Conversion Costs of HVDS

Sl.No. Details Cost per unit (Rs.)

1. Conversion of LT line into 11 kV (HVDS) line (per km) 29,623.342. Supply and erection of 16kVA copper wound distribution

transformer, with all the accessories (each) 70,716.74

3. Supply and erection of 25 kVA copper wound distribution transformers, with all the accessories (each)

88,648.17

4. Supply and erection of LT AB cable (3x16+25 mm2) (Per km.)

49,669.82

5. Replacing the existing 50/63/100 kVA transformers and handing over to District Stores.

1,049.07

The cost of the removed 50/63/100 kVA transformers are separately valued.

The conversion costs of LT line to 11 kV and replacement of existing 100 kVA, 63

kVA and 50 kVA transformers with 16 kVA and 25 kVA transformers within the

feeding area of 100 kVA transformers, 63 kVA and 50 kVA transformers are given in

Table-4.5 below: The costs are net on giving credit to the existing 100 kVA, 63 kVA

and 50 kVA transformers.

Table-4.5

Conversion Costs of HVDS, replacing different capacities of existing Transformers

(Rs. in lakhs)

Sl. No. Details

Costs obtained/ validated

2007-08 and 2008-09

1 Conversion cost of LT line to 11 kV and replacement of 100 kVA Transformer with required number of 25 kVA transformers.

10.15


6.39


5.08


13.70


8.63


6.85

20

(iii) 33/11 kV Receiving Stations (Substations)

The utility has a large rural network supplying power to a large number of

agricultural pump sets and rural households.

A number of substations are being constructed in rural areas and few in urban areas.

The utility has standardised the substation layouts with the following transformer

capacities and 11 kV outgoing feeders.

(i) 1x5 MVA 33/11 kV transformer with 3 numbers out going 11 kV feeders.

(ii) 1x5 MVA 33/11 kV transformer with 2 numbers outgoing 11 kV feeders.

(iii) 1x5 MVA 33/11 kV transformers with 4 numbers outgoing 11 kV feeders.

The capacitor banks are not installed in all substations; they are being installed

wherever required. The costs for substation furnished are without capacitor bank.

The cost of substation with capacitor bank is also worked out.

The 11 kV capacitor bank (2 MVAR) with breaker etc., is costing about Rs.8.77

lakhs/unit and this cost is added where substation cost is shown without capacitor

bank. While benchmarking costs of the 33/11 kV substations with 1x5 MVA

transformer with 3 numbers outgoing feeders, a capacitor bank is considered. This is

discussed in Chapter-5.

The utility does not provide 33 kV breaker (s) on the 33 kV side of the transformers

either it is with 1x5 MVA transformer or 2x5 MVA transformers. The substations are

erected with 9.1 meter PSCC poles and a small control room (12 ft. x18 ft.) is

provided.

Since the utility constructs a large number of 33/11 kV substations mostly in rural

areas, the layouts are simple and all are outdoor substations. The same layout is

adopted in urban and rural areas. The utility has not constructed any indoor

substations.

As mentioned earlier the substations are awarded mostly on turnkey basis and also

on partial turnkey basis in some cases and the costs indicated are completed costs.

Substation Costs (Outdoor)

Only outdoor substations are constructed by the utility.

The costs for 33/11 kV substations as obtained from the utility and validated with the

break-up costs of (i) Land (ii) civil works (iii) equipment and material costs and

21

(iv) over heads are as under for 33/11 kV substations with 1x5 MVA transformer with

2,3 and 4 numbers of 11 kV feeders with and without capacitor bank are given in

Table-4.6 below:

Table-4.6

Costs at 33/11 kV substations (Outdoor) (Rs. In lakhs)

Sl. No.

Details Costs as obtained / validated 2007-08 2008-09

1 33/11 kV substation with 1x5MVA transformers and 3 out going 11 kV feeders

(a) Land - -(b) civil works 5.439 9.07(c) Equipment and material 55.603 57.9(d) Contingencies, labour and establishment charges 13.033 14.010

Total including civil works 74.08 80.08(e) Capacitor Bank (2.0 MVAR) with associated

accessories 8.77 8.77

Total including capacitor bank 82.85 89.752 33/11 kV substation with

1x 5MVA transformers and 2 out going 11 kV feeders

(a) Land - -(b) civil works 5.439 9.07(c) Electrical works material and equipment 52.533 54.83(d) Contingencies, labour and establishment charges

etc. 12.31 13.27

Total including civil works 70.28 77.17(e) 11 kV capacitor bank (2.0 MVAR) 8.77 8.77

Total including capacitor bank 79.05 85.04(3) 33/11 kV substation with

1x 5 MVA transformers and 4 out going 11 kV feeders

(a) Land - -(b) civil works 5.439 9.07(c) Electrical works equipment and material 58.673 60.97(d) Contingencies, labour and establishment charges 13.753 14.29

Total cost including civil works 77.865 84.67(e) 11 kV capacitor bank (2.0 MVAR) 8.77 8.77

Total including capacitor bank 86.635 93.44 As mentioned earlier the utility has simplified the layouts with minimum land

requirement etc. The land is obtained either free, donated by the consumers of the

area, or paying nominal cost preferably for Government land. Staff quarters are not

constructed at 33 kV substations. Control room is of 18 ft. x 12 ft. area. No compound

wall is constructed and only fencing is provided. The substation occupies an area of

about 2000 sq. meters or half an acre.

22

(iv) Distribution Transformer Stations

The utility installs distribution transformers of capacities of 15 kVA single phase and

25 kVA, 63 kVA and 100 kVA three-phase. It does not install more than 100 kVA

capacities even in urban areas. The utility procures both CRGO core and amorphous

core transformers. The transformer is installed mostly on a single pole structure with

AB switch etc., the cost includes the structure, cabling etc.

The cost of distribution transformer stations with different capacity transformers

including structure etc., as obtained are given in Table-4.7 below:

Table-4.7

Cost of Distribution Transformer Stations (Rs. In lakhs / each)

Sl.No. Details Costs obtained / validated

2007-08 2008-09

1 Single phase 15 kVA of Amorphous core transformers

- 0.390

2 Single phase 15 kVA oil immersed transformers

0.423 -

4 63 kVA CSP transformer 1.328 1.5795 63 kVA Amorphous core transformer 1.532 1.6256 100 kVA CSP transformer 1.583 1.8117 100 kVA Amorphous core transformer 1.963 1.834

No 25 kVA transformers are erected during the last 2 years. The utility is not

procuring BEE energy efficiency star rating transformers.

The Benchmark costs of the distribution transformer stations of various capacities

along with costs obtained from other utilities are discussed in chapter-5.

(v) Metering Equipment

The costs of metering sets and meters as installed for different categories of

consumers as obtained from APSPDCL are given below. The utility installs only

static meters of different capacities for LT consumers and Trivector meters for HT

consumers. The costs are given in Table-4.8 below:

Table-4.8

Costs of Metering Sets and Meters (Rs. each)

Sl. No.

Details Costs as obtained/validated 2007-08 2008-09

1 33 kV CT set 22337 189642 33 kV PT set 18736 156653 11 kV CT/PT set 27200 283004 Trivector meters 4000 38805 LT 3phase meter 1462 13186 LT Single phase meter 457 445

23

The cost of metering for 33 kV and 11 kV consumers is the cost of metering sets plus

trivector meters.

The benchmark costs would be discussed in Chapter-5 on comparing the costs in

other utilities.

(vi) Service Line Costs

The service line costs are standardised for single-phase installations upto 250 watt

load and for other services the costs are estimated. The estimated costs are

generally worked out.

The service line costs for industrial and commercial services and HT consumers are

worked out in individual cases based on the actual input material costs. In addition,

the utility collects development costs from consumers.

The costs as obtained / validated are given in Table-4.9 below:

Table-4.9

Service Line Costs (in Rupees)

Sl.No. Details 2007-08 2008-09 1. Cost data for Agricultural service erected on

support. 2800 2900

2. Service connection of domestic and non-domestic (single phase) with electronic meter

1600 1600

3. Service connection of domestic and non-domestic (single phase) with high quality meter

1900 1900

4. Service connection of domestic – non-domestic (3 phase) static meter

3000 3000

5. Service connection of domestic – non-domestic (3 phase) with high quality meter

3300 3300

6. Service connection for industrial service (upto 15 HP) with electronic meter

3100 3100

7. Service connection of industrial service (upto 15 HP) with high quality meter

3800 3800

8. Service connection of 3 phase industrial service (above 15 HP) with CT meter

9600 9600

9. Street light service connection 2200 220010. Erection of LT electronic trivector meters on LV

side of DTR 9500 9500

The benchmark costs are discussed in chapter-5 on comparing the costs in other

utilities.

24

2. Central Power Distribution Company of Andhra Pradesh Limited (APCPDCL)

As discussed under APSPDCL (P) the distribution companies in Andhra Pradesh

manage 33 kV, 11 kV and LT systems under distribution. The utility prepares cost

data / cost estimates for various elements in distribution business – 33/11 kV

substations, distribution transformer stations, 33 kV, 11 kV and LT lines etc., and

updates the data yearly based on input costs. This cost data is adopted for

preparation of estimates for works and award of contracts either on turnkey basis or

partial turnkey basis.

It is found generally that the executed costs are well within the estimated costs as per

cost data the variation is about + 5%.

The costs of various elements in distribution business are discussed below:

(i) 33 kV, 11 kV and LT lines (overhead) The construction of lines is generally awarded on partial turnkey basis with major

material supplied by the utility and the erection by the contractor along with supply of

minor materials.

(a) 33 kV lines (overhead)

The utility has standardised the construction of 33 kV line with 100 mm2 AAAC

conductor on 9.1 meter PSCC poles with 105, 80 and 65 meter spans in rural areas.

In urban areas the lines with 65 meter span length over 9.1 meter PSCC poles is

generally adopted. Standard cost data are also available with 50 meter and 60 meter

spans over 12 meter RS Joists and 11 meter PSCC poles for adoption in the cities

where the clearances with 9.1 meter poles may not be adequate.

The cost per km of line as obtained / validated from the utility are given in Table-4.10

below:

25

Table-4.10

Costs of 33 kV lines (Overhead) (Rs. In lakhs/km)


2007-08 2008-09

1 33 kV line with 100 mm2 AAAC over 9.1 meter PSCC poles with 105 meter span

2.99 -


3.18 3.45


3.28 3.54

(b) 33 kV Underground System

33 kV underground cable system is executed in Hyderabad city, wherever the laying

of overhead lines is not possible. The size of the cable standardised is 3x400 mm2

XLPE cable.

The cost of underground cable system as obtained from the utility are given in Table-

4.11 below:

Table-4.11

Costs of 33 kV Underground Cable System (Rs. In lakhs/km)

Sl.No. Details Costs obtained/validated 2006-07 2007-08

1

i) 33 kV underground cable line with 3x400 mm2 XLPE

19.53

24.17

ii) Road Restoration charges 9.23 10.98 Total 28.76 35.15

The major items that influence the cost are the rate per km. of the cable, the type of

soil etc. The road restoration charges which are substantial (about Rs. 10lakhs /KM).

(c) 11 kV Overhead Lines The utility adopts the following norms for construction of 11 kV lines:

11 kV lines are constructed with 34 mm2 and 55 mm2 AAAC on 9.1 and 8.0 meter

supports with 60 and 65 meter spans. The line with 65 meter span is most common.

In city 11 kV lines over 11 meter spun poles / RS joists with 55 mm2 AAAC having 50

meter span are also adopted.

The costs of 11 kV overhead lines as obtained / validated are given in Table-4.12

below:

26

Table-4.12

Costs of 11 kV Overhead Lines (Rs. In lakhs/km)

Sl. No.

Details Costs obtained / validated 2007-08 2008-09

1 11 kV line with 55 mm2 AAAC with 60 meter span over 8 meter PSCC poles

2.16 2.37

2 11 kV line with 55 mm2 AAAC with 60 meter span over 9.1 meter PSCC poles

2.58 2.91


2.00 2.24


2.23 2.36

5 11 kV line with 55 mm2 AAAC with 50 meter span over 11 meter RS Joists.

5.03 8.40

In the case of item 5 the relatively high cost is due to 11 meter RSJs and reduced

span length.

(d) 11 kV Underground System

The utility is providing underground cable system, wherever required in the cities.

The costs of 11 kV underground system as obtained from the utility are given in

Table-4.13 below:

Table-4.13

Costs of 11 kV Underground Cable Feeders (Rs. In lakhs/km)

Sl. No. Details Costs obtained / validated

2007-08 2008-09 1

i) Laying of 11 kV 3x 185 mm2

12.40

-

ii) Road cutting and Restoration charges 6.76 - Total 19.16 -

2 i)

Laying of 11 kV 3x 300 mm2

14.55

-

ii) Road Restoration charges 9.75 - Total 24.30 -

3 x 185 mm2 and 3 x 300 mm2 XLPE cables are the two standard sizes used for the

11 kV underground cable system by the utility.

(e) LT Overhead Lines The utility adopts the following norms for construction of LT lines.

(i) LT 3 phase 5 wire line with 3x55 mm2 + 2x34 mm2 AAAC on 8.0 meter PSCC

poles with 45 meter and 65 meter spans.

(ii) LT 3 phase 5 wire line with 5x34 mm2 AAAC on 8.0 meter PSCC poles with 65

meter span

(iii) 3 phase 4 wire line with 3x55 mm2 AAAC + 1x34 mm2 AAAC over 8.0 meter

PSCC poles with 65 meter span.

27

(iv) 3 phase 4 wire line with 4x34 mm2 AAAC over 8.0 meter PSCC poles with 65

meter span.

(v) Single phase 3 wire line with 3x34 mm2 AAAC over 8.0 meter PSCC poles with

65 meter span.

(vi) Single phase 2 wire line with 2x34 mm2 AAAC over 8.0 meter PSCC poles with

60 meter and 65 meter span



Urban and rural areas for 3 phase supply (4 wires) and for street light supply (5th wire). 45 meter span is adopted mainly in Hyderabad city and 65 meter span in other urban areas.

(ii) 3 phase 5 wire with 34 mm2 AAAC Rural areas for 3 phase supply (4 wires) and for street light supply (5th wire).

(iii) 3 phase 4 wire with 3x55 mm2 + 34mm2 AAAC


(iv) 3 phase 4 wire with 4x34 mm2 AAAC



For single phase supply for loads (2 wire) and street light (3rd wire). Mostly used in urban and rural areas with single phase loads and street light connections.



The costs of LT overhead lines as is being commonly constructed by the utility are

given in Table-4.14 below:

Table-4.14

Costs of LT Overhead Lines (Rs. In lakhs)

Sl. No.

Details

Costs obtained / validated

2007-08 2008-09 1 LT 3 phase 5 wire line with 3x55 mm2 + 2x34mm2 AAAC

with 65 meter span over 8 meter PSCC poles. 2.41 2.60

2 LT 3 phase 5 wire line with 5x34mm2 AAAC with 65 meter span over 8 meter PSCC poles.

1.89 2.05

3 LT 3 phase 4 wire line with 3x55 mm2 + 1x34mm2 AAAC with 65 meter span over 8 meter PSCC poles.

2.21 2.34

4 LT 3 phase 4 wire line with 4x34 mm2 AAAC with 65 meter span over 8 meter PSCC poles.

1.69 1.91

5 LT Single phase 3 wire line with 3x34 mm2 AAAC with 65 meter span over 8 meter PSCC poles.

1.36 1.46

6 LT 4 wire line with 3x16 mm2 + 1x25mm2 AB cable with 65 meter span over 8 meter PSCC poles.

1.44 1.70

The LT AB cable lines are erected, wherever short lengths of LT lines under small

capacity (16/25 kVA) distribution transformers are involved and also where HVDS is

implemented.

28

(f) LT Underground System

The utility is laying LT underground cable in the Hyderabad city wherever erection of

overhead network is not feasible. The standard sizes of cables used by the utility are

3 ½ core 95, 70 and 25 mm2 XLPE cables.

The costs as obtained from the utility for underground cable system are given in

Table-4.15 below.

Table-4.15

Costs of Underground Cable System (Rs. In lakhs)

Sl. No.

Details Costs obtained/validated 2006-07 2007-08

1 3 ½ core 95 mm2 XLPE LTUG cable 3.60 4.87 This is done in a limited area in some housing colonies. No road restoration charges

are involved in the above costs.

(ii) 33 / 11 kV Substations (Receiving stations)

The utility have standardised the transformer capacities and the number of 11 kV

outgoing feeders etc., at the 33/11 kV substations. Since the utility is constructing a

large number of substations, particularly, in rural areas the layout is simplified. The

substation is erected in rural area with 1x5 MVA transformer initially and additional

transformers added based on load development. The utility also is installing indoor

substations in Hyderabad city where availability of land is scarce. The transformer

capacity of the substations in Hyderabad city area are 2x5 MVA or 2x8 MVA.

(a) Outdoor Substations

The costs of 33/11 kV outdoor substations being constructed by the utility are given

in Table-4.16 below:

Table-4.16

Costs of 33/11 kV Substation (Outdoor) (Rs. In lakhs)

Sl. No.

Details

Costs as obtained / validated 2007-08 2008-09

1 33/11 kV substations with 1x5MVA Transformers with 3 Nos. outgoing 11 kV feeder

91.55 94.24

2 33/11 kV substation with 1x5 MVA transformers and 2 Nos. outgoing 11 kV feeders

87.39 93.71

3 33/11 kV substations with 1x5 MVA transformers with 4 Nos. 11 kV outgoing feeders.

93.00 -


146.65


183.85 -

29

The costs with 5 MVA transformers are without 33 kV circuit breaker on 33 kV side of

transformers and without capacitor bank. For the substation under item-4, a group

control 33 kV CB is provided on HV side of power transformers. The power

transformers are protected on the 11 kV side and also the 11 kV feeders with

individual control breakers. Capacitor banks are provided wherever required. The

substation cost including capacitor bank is considered for benchmark costs.

The break-up costs for 33/11 kV substations as obtained from the utility and validated

for (i) land (ii) civil works covering buildings etc., (iii) Equipment cost including

structures, foundations, cabling etc., and (iv) contingencies, labour and establishment

charges etc., are given in Table-4.17 below:

Table-4.17

Break-up Costs for 33/11 kV Substations (Rs. In lakhs)

Sl. No. Details Costs as obtained / validated

2007-08 2008-091 33/11 kV substations with 1x5MVA Transformers

with 3 Nos. outgoing 11 kV feeder

i) Land - 10.00ii) Civil works 14.82 20.82iii) Equipment etc. 54.09 50.75iv) Contingencies, labour and establishment 15.195 15.24

Total including civil works 84.11 96.80v) Capacitor Bank 7.44 7.44

Total 91.55 104.242 33/11 kV substation with 1x5 MVA transformers

and 2 Nos. outgoing 11 kV feeders

i) Land - 10.00ii) Civil works 14.82 20.82iii) Equipment etc. 51.79 50.75iv) Contingencies, labour and establishment 13.342 14.70

Total including civil works 79.952 96.27v) Capacitor Bank 7.44 7.44

Total 87.39 103.713 33/11 kV substations with 1x5 MVA transformers

with 4 Nos. 11 kV outgoing feeders.

i) Land - -ii) Civil works 14.82 -iii) Equipment etc. 56.39 -iv) Contingencies, labour and establishment 14.444 -

Total including civil works 85.65 -v) Capacitor Bank 7.44 -

Total 93.00 -4 33/11 kV substations with 2x5 MVA transformers


i) Land - 10.00ii) Civil works - 22.82iii) Equipment etc. - 91.83iv) Contingencies, labour and establishment - 24.56

Total including civil works 149.21v) Capacitor Bank 7.44

Total 156.65Contd.

30


2007-08 2008-095 33/11 kV substations with 2x8 MVA transformers


i) Land - ii) Civil works 14.82 iii) Equipment etc. 127.68 iv) Contingencies, labour and establishment 33.91 v) Capacitor Bank 7.44

Total 183.85 Note: The costs of land and civil works during 2008-09 are Rs. 30.82 lakhs against Rs. 14.82 lakhs during 2007-08, due to considering land cost at Rs. 10 lakhs and additional cost for control room, compound wall etc. Earlier the utility used to get land free from government or consumers. While benchmarking the land costs are not being included (b) 33/11 kV Substation (Indoor) The indoor 33/11 kV substations are constructed in Hyderabad city because of space

constraint. 33 kV and 11 kV switchgear and control panels are located indoor in the

control room. The cost of control room in indoor substation is about 4 times the cost

of control room in outdoor substation.

The costs of indoor substations executed by the utility are as indicated in Table-4.18

below:

Table-4.18

Cost of Substations (Indoor) (Rs. In lakhs)

Sl. No.

Details Costs obtained/validated 2007-08 2008-09

1 33/11 kV indoor substation with 2x5MVA power Transformers with 5 Nos. outgoing 11 kV feeders

- 237.07

2 33/11 kV indoor substations with 2x8MVA power Transformers with 6 Nos. outgoing 11 kV feeders

307.85 * -

* The land cost of Rs. 20 lakhs is included in the costs. (iii) Distribution Transformer Stations (Outdoor) The utility installs distribution transformer stations with transformer capacities of 25

kVA, 63 kVA, 100 kVA three phase and 15 kVA single phase. The CSP distribution

transformers with CRGO core are used by the utility.

The costs of installation of distribution transformer stations including cost of

structures, cabling, fuse control etc. as furnished by the utility are given in Table-

4.19 below:

31

Table-4.19

Cost of Distribution Transformers Stations (Rs. In lakhs)

Sl. No.


Three Phase 11 kV/433 V Transformer stations 1 25 kVA 0.840 0.978 2 63 kVA 1.193 1.518 3 100 kVA 1.686 1.715 Single Phase 6.6 kV/250 V Transformer Stations

4 15 kVA/16 kVA 0.413 0.429 (iv) Metering Equipment and Meters

The costs of metering equipment and meters being installed by the utility are given in

Table-4.20 below:

Table-4.20

Costs of Metering Equipment and Meters (Rs. )


2007-08 2008-091 33 kV CTs for HT metering 20,029 20,0292 11 kV CT/PT set for HT metering 31,886 26,1003 HT trivector meter 4,907 6,6714 LT 3 Phase meters 1,522 1,6815 LT single phase meter 553 462

The utility provides only static meters to all consumers. (v) Service Line Costs

The service line costs for various classes of consumers as provided by the utility are

given in Table4.21 below:

Table-4.21

Service Line Costs (Rs.)

Sl.No. Details

Costs obtained / validated

2007-08 2008-091 Single Phase service for domestic / non-domestic with

electronic meter 1700 1900

2 Three phase service for domestic / non-domestic with electronic meter

4300 5400

3 Three phase agricultural service with meter 3600 50004 Industrial service upto 20 HP 4600 56005 Industrial service above 20 HP with LT Trivector meter 11,300 11,0006 Street light service 2300 25007 LT Trivector meter erected on LV side of DTR,. 10,900 11,000

The benchmark costs for all components of Distribution Business are discussed in

Chapter-5.

32

3. Tamil Nadu Electricity Board (TNEB)

The Tamil Nadu Electricity Board (TNEB) awards the works mostly on labour contract

with all the material / equipment supplied by the Board. In some cases the contractor

supplies minor materials and executes the work.

The costs of various elements in distribution business as furnished by TNEB are

discussed below:

(i) 33/11 kV, 22 kV,11 kV and LT Lines

TNEB is an integrated utility in-charge of generation as well as the transmission and

distribution network in the State. The voltages of 33 kV, 22kV, 11 kV and LT come

under distribution. 33 kV, 11 kV and LT underground cable system is implemented in

Chennai city.

(a) 33 kV Lines

33 kV Overhead Lines – The cost of 33 kV overhead lines as obtained from TNEB

are given in Table 4.22 below:

Table-4.22

Costs of 33 kV lines (Rs. in lakhs/km)

Sl. No.


1 33 kV line with 100 mm2 (DOG) ACSR with 90 meter span on 9.14 meter special RCC poles.

3.04 3.54

(b) 33 kV Underground cable system

The costs of 33 kV underground cable system, as obtained from TNEB is given

below in Table-4.23.

Table-4.23

Cost of 33 kV Underground Cable System (Rs. in lakhs/km)

Sl. No.


1 i)

33 kV X LPE underground cable 1x630 mm2 (3 circuits) per km.

22.65

22.65

ii) Road restoration charges 30.64 30.64 Total 53.29 53.29

The cost of laying cables varies from route to route as road restoration charges differ

vastly from place to place and the expenditure involved is substantial. Benchmarking

is considered for the costs other than road restoration charges.

33

(c) 11 kV and 22 kV System

11 kV and 22 kV over headlines

The costs for 11 kV and 22kV lines with different sizes of conductor, supports and

spans as obtained from TNEB are given below in Table 4.24.

Table-4.24

Costs of 11 kV Lines (Rs. in lakhs/km)

Sl. No. Details

Costs as obtained / validated 2007-08 2008-09

1 11 kV line with 7/4.09 mm ACSR at 105 meter span on 9.14 meter RCC poles.

2.47 2.65

2 11 kV line with 7/3.35 mm ACSR at 85 meter span on 8 meter RCC poles.

1.98 2.15

3 11 kV lines with 7/3.35 mm ACSR at 67 meter span on 7.5 meter RCC poles

2.13 2.28

4 22 kV line with 7/2.59 mm ACSR at 60 meter span over 8 meter RCC poles

1.89 2.10

5 22 kV line with 7/3.35 mm ACSR at 75 meter span over 8 meter RCC poles

2.20 2.40

TNEB has both 11 kV and 22 kV voltages. The 11 kV line with 85 meter span is

constructed in rural areas and with 67 meter span is constructed in urban areas.

Similarly the 22 kV lines. 22 kV voltage is limited to about 4 districts in the State.

(d) 11 kV Underground cable system

The costs of 11 kV UG cable system as obtained from TNEB is given below in Table-

4.25:

Table-4.25

Costs of 11kV Underground Cable System (Rs. in lakhs/km)


2007-08 2008-09 1

i) Laying of 11 kV 3x300mm2 X LPE underground cable

14.79

11.99


2 i)

Laying of 11 kV 3x120mm2 X LPE underground cable

7.72

7.29


34

The road restoration charges may vary from place to place. The actual costs depend

on the area of working and the extent of road cutting and the type of road, such as

BT, GST or NH road.

The costs include the costs of straight joints, terminations, trough and the cost of

cable.

L T System

(e) LT overhead lines

The costs of LT overhead lines as obtained from TNEB are given in Table4.26 below:

Table-4.26

Costs of LT overhead Lines (Rs. in lakhs/km)

Sl. No.


1 LT 3 phase 4 wire line with 3x7/3.35 + 1x7/2.59 mm ACSR with 60 meter span on 8 M, PSCC poles.

2.19 2.44

2 LT 3 phase 4 wire line with 4x7/2.59 mm ACSR with 75 meter span over 7.5 M, RCC poles.

1.622 1.754

3 LT single phase 3 wire line with 3x2.59 ACSR with 75 meter span over 7.5M, RCC poles .

1.369 1.480

4 LT single phase 2 wire line with 2x2.59 ACSR with 75 meter span over 7.5 M, RCC poles.

1.113 1.204


The underground system in TNEB is mostly in Chennai, the costs as furnished by

TNEB are given in Table-4.27 below:

Table-4.27

Costs of LT Underground System (Rs. in lakhs/km)

Sl. No.

Details Costs as obtained / validated2007-08 2008-09

1 i)

Laying of LT, 4x120mm2 X LPE underground cable

3.58

3.96

ii) Road Restoration charges 12.00 12.00 Total 15.58 15.96

The costs include the costs of straight joints, terminations, trough, and the cost of

cable.

35

(ii) 33/11 kV Substations (Receiving Stations) TNEB adopts power transformer capacities of 1x8 MVA or 2x8 MVA at its 33/11 kV

substations and has both indoor and outdoor substations. The cost of substations

with break-up of costs into (i) land (ii) civil works (iii) equipment and material costs

and (iv) over heads etc., as obtained / validated, are given in Table 4.28 below:

Table-4.28

Break-up costs of 33/11 kV substations costs with break-up details (Rs. in lakhs)

Sl. No.


1 33/11 kV A outdoor with 1x8MVA transformers and 3 out going feeders

(a) land 2.00 2.96(b) Civil works 20.08 18.73(c) Equipment and material 79.075 77.23(d) Contingencies, labour and establishment charges 23.68 22.93

Total including land and civil works 124.83 121.85(e) Capacitor Bank (2.4 MVAR) with associated

accessories 12.346 12.50

Total including capacitor bank 137.19 134.352 33/11 kV Indoor substation with 1x 8 MVA with 4 out

going feeders

(a) land 2.00 (b) Civil works 19.50 -(c) Electrical works material and equipment 117.33 -(d) Contingencies, labour and establishment charges

etc. 35.72 -

Total including land and civil works 174.55 -(e) 11 kV capacitor bank (2.4 MVAR) 12.44 -

Total including capacitor bank 186.99 -(3) 33/11 kV outdoor SS with 2x8 MVA with 3 out going

feeders (without quarters)

(a) land 5.94(b) Civil works 18.10(c) Electrical works equipment and material 148.41(d) Contingencies, labour and establishment charges 45.60

Total cost including land and civil works 218.05(e) 11kV Capacitor bank (4.8 MVA) 25.00

Total including capacitor bank 243.05(4) 33/11 kV indoor substation with 2x8 MVA

Transformers and 6 out going feeders.

(a) land 100.00 (b) Civil works 68.00 (c) Electrical works equipment and material 205.02 (d) Contingencies, labour and establishment charges 68.77

Total cost including land and civil works 441.75 (e) 11 kV capacitor bank (4.8 MVAR) 25.00

Total including capacitor bank 466.79 The actual costs booked for items (2) and (3) are less as the released transformers

from other stations are erected for these works and depreciated costs of removed

transformers are taken into account. Hence the above costs shown in the table are

36

validated ones, with the cost of new transformers, which are to be considered for

bench marking.

The difference in the costs of different substations is only due to the cost of land,

control room (control rooms in some places are constructed to accommodate

different offices). The equipment cost and the contingency, establishment and

general charges vary marginally.

It is the practice in TNEB that in most of the estimates the depreciated costs of the

released power transformers available is provided. The same cost is provided, while

arriving at the cost as per actuals. For benchmarking purpose, the depreciated costs

of equipment cannot be taken into account, only the cost of new equipment procured

/ to be procured during a particular year has to be taken into account. All these

issues are taken into consideration, and the benchmark cost for 33/11 kV substations

are discussed in Chapter-5 considering the substation costs only along with the data

obtained form other States.

(iii) Distribution Transformer Stations

TNEB installs distribution transformer stations with transformer capacities of 63 kVA,

100 kVA, 200 kVA, 250 kVA and 500 kVA of 11 kV/433 V and 22 kV/433 V. The

costs of distribution transformer stations including cost of structure, cabling etc., as

obtained from TNEB are given in Table-4.29 below:

Table-4.29

Costs of Distribution Transformer Stations (Rs. in lakhs)

Sl. No.


11 kV/433V Transformer stations 1 63 kVA CSP Transformers 1.012 2 100 kVA CSP Transformers 1.88 1.97 3 250 kVA CSP Transformers 3.064 3.208 4 500 kVA CSP Transformers 5.952 5.948 22 kV/433V Transformer stations 1 63 kVA CSP Transformers 1.217 - 2 100 kVA CSP Transformers 2.906 3.027 3 200 kVA CSP Transformers 4.183 4.045 4 500 kVA CSP Transformers 7.267 7.267

The actual costs, incurred by TNEB are much less than the above as the costs of

released transformers from other stations are taken in actual execution costs. Hence

for benchmarking purpose, the costs of new transformers ordered during the

particular year are taken into consideration and validated accordingly.

37

TNEB is not ordering Amorphous core transformers and BEE Energy Efficiency star

rating transformers.

(iv) Metering Equipment

The costs of metering equipment and meters being installed by TNEB as obtained

from them are given in Table-4.30 below:

Table-4.30

Costs of Metering Equipment and Meters (Rs. each)

Sl. No.

Details Costs as obtained 2006-07 2007-08

1 33 kV CT (outdoor) 21200 21400 2 11 kV CT (outdoor) 15180 16717 3 33 kV PT (outdoor) - - 4 11 kV PT (outdoor) - 20710 5 33 kV PT (Indoor) 32400 31700 6 11 kV PT (Indoor) 20400 18400 7 HT Trivector meter 7310 8040 8 LT 3 Phase meter 1139 1337 9 LT single phase meter 594 576

TNEB is providing mostly static meters.

For 33kV and 11kV metering , the cost of metering equipment and trivector meter is

to be considered together. (v) Service Line Costs

The service line costs for different categories of consumers based on supply voltage

etc., as obtained from TNEB are given in Table-4.31 below:

Table-4.31

Service Line Costs

(Rs. each) Sl.No. Details Cost as per cost data

2007-08 2008-091 Industrial connection upto 15 HP 4700 50402 Industrial connection above 15 HP upto 50 HP 9080 95703 Agricultural connection 4830 52404 Single phase domestic and commercial connection 790 8505 Street light connection with single phase meter 1830 1600

The service line charges are normally collected as a fixed amount.

The benchmarks costs for various elements in distribution business detailed above

are discussed in Chapter-5 on evaluation of costs from other utilities.

38

4. Uttar Gujarat Vij Company Limited (UGVCL)

The distribution companies in Gujarat handle only 11 kV and LT network under

distribution. There is also 22 kV network which is negligible. The EHV voltages

adopted in Gujarat are 400 kV, 220 kV and 66 kV – 66 kV and above are handled by

Transmission Company. UGVCL draws power at 11 kV and 22 kV from 66/11 kV

and 66/22 kV substations and manage only 11 kV, 22kV and LT network under

distribution.

The costs collected for various components of distribution business from UGVCL are

discussed below:

(i) 22 kV, 11 kV and LT network

(a) 22 kV and 11 kV lines (Overhead)

The cost of 22 kV and 11 kV lines (overhead) being constructed by UGVCL, obtained

from the utility and validated are given in Table 4.32 below:

Table-4.32

Costs of 22kV and 11 kV Lines (Rs. in lakhs/Km)

Sl. No.

Details Costs obtained/validated 2007-08 2008-09*

1 22 kV line with 55 mm2 AAAC on 8 meter PSCC poles with 50 meters span. *2.234 *2.224

2 22 kV line with 34 mm2 AAAC over 8 meter PSCC poles with 50 meters span. *1.824 *1.824

3 11 kV line with 55 mm2 AAAC on 8 meter PSCC poles with 50 meters span. 1.935 1.98

2 11 kV line with 34 mm2 AAAC on 8 meter PSCC poles with 50 meter span. 1.518 1.56

3 11 kV line with “Dog” ACSR conductor on RS Joist supports with 33 meter span. 6.712 6.89

*No new 22 kV line is constructed during 2007-08 and 2008-09. The values shown are as per cost data, which can be adopted for benchmark purpose. There is no 11 kV and 22 kV underground cable system in UGVCL.

(b) LT lines (Overhead)

The LT lines being constructed by the utility to service different classes of consumers

and the costs as obtained from the utility and validated are given in Table 4.33 below:

39

Table-4.33

Costs of LT lines (Overhead) (Rs. in lakhs/Km)

Sl. No.

Details Costs as obtained / validated

2007-08 2008-09

1 LT 3 Phase 5 wire line with 3x55mm2 + 2x34 mm2 AAAC with 30 meter span over RS joists 4.890 4.897

2 LT 3 Phase 5 wire line with 3x55mm2 + 2x34 mm2 AAAC with 50 meter span on 8 meter PSCC poles. 2.174 2.195

3 3 Phase 5 wire line with 34 mm2 AAAC with 30 meter span over 8 meter PSCC poles. 2.378 2.40


5 3 Phase 4 wire line with 3x55 mm2 +1x34 mm2 AAAC with 30 meter span over RS joists. 4.907 4.953

6 3 Phase 4 wire line with 3x55 mm2 +1x34 mm2 AAAC with 30 meter span over 8 meter PSCC poles 2.504 2.528

7 3 Phase 4 wire line with 3x55 mm2 +1x34 mm2 AAAC with 50 meter span over 8 meter PSCC poles 1.916 1.934



10 Single phase 3 wire line with 2x55mm2 +1xc34 mm2 AAAC with 30 meter span over 8 meter PSCC poles 1.665 1.673

11 Single phase 3 wire line with 2x55mm2 +1xc34 mm2 AAAC with 50 meter span over 8 meter PSCC poles 1.402 1.415

12 Single phase 2 wire line with 34 mm2 AAAC with 50 meter span over 8 meter supports 1.057 1.066

As explained under APSPDCL the LT lines with different conductor configuration (5

wire, 4 wire, 3 wire and 2 wire) are constructed for different purposes and also span

lengths adopted are different in urban and rural areas.

LT Underground Cable System

There is no LT underground cable system in UGVCL.

(ii) 33/11 KV Receiving Stations (substations)

As mentioned earlier the utility does not have 33 KV system, the utility draws power

at 11 kV from 66/11 kV substations of Transmission Company.

(iii) Distribution Transformer Stations (Outdoor)

The utility installs 25 kVA, 63 kVA, and 100 kVA, 11 kV/433 V distribution transformer

stations and also 22 kV/433 V transformer stations with of 63 kVA & 100 kVA

capacity transformers.

40

The costs of distribution transformer stations as obtained / validated from the utility

are given in the Table 4.34 below. The costs include the cost of structure, cabling,

erection etc.

Table –4.34

Costs of Distribution Transformer stations (Rs. Lakhs/each)

S. No.

Details

Costs as obtained/validated

2007-08 2008-091 25 KVA, 11 KV/433 V Transformer station 1.136 1.136

2 63 KVA, 11 KV/433 V CSP Transformer Station 1.735 1.735

3 100 KVA 11 KV/433 V CSP Transformer station 2.121 2.121

4 22 KV/433 V, 63 KVA Transformer station 2.283 2.283

5 22 KV/ 433 V, 100 KVA Transformer station 2.803 2.803

The actual costs of the above items is less as the transformers procured during

earlier years were used, when the costs were less. These costs are validated taking

into account, the cost of transformers procured during the year, for benchmarking

purposes.

The utility is not procuring Amorphous core and BEE Energy efficient Star rated

transformers.

(iv) Metering Equipment and Meters The metering equipment includes 11 KV CT/PT set, trivector meters, LT-3 phase and

single phase meters. The costs as obtained are given in Table 4.35 below:

Table – 4.35

Costs of Metering Equipment (Rs./each)

S.No Details Cost of Metering Equipment 2006-07 2007-08

1 11 KV CT/PT Set 33,000 -2 Trivector meter 3850 28103 3 phase meter 1550 10554 Single phase meter 848 840

For 11 kV metering the cost of metering equipment and trivector meter has to be

considered together.

41

(v) Service Line Costs

The service line costs being adopted by UGVCL are given below in Table –4.36

Table –4.36

Service Line costs

S. No

Details Cost in Rs. 2007-08 2008-09

1 Single phase service (upto 6 kW) 1810 1810

2 Single phase street light connection 1932 1932

3 Three phase service connection upto 5 HP 8600 8600

4 Three phase service connection 5 HP to 10 HP 9161 9161



7 Three phase service connection 60 HP and above 18824 18824

The utility normally adopts standard rates to different class of consumers of

Residential, commercial, small industries etc. For other consumers the costs are

worked out individually.

The benchmark costs for various elements in distribution business detailed above are

discussed in chapter-5 on evaluation of costs from other utilities.

42

5. Madhya Gujarat Vij Company Limited (MGVCL)

As discussed under Uttar Gujarat Vij Company Limited (UGVCL), the distribution

companies in Gujarat handle 11 kV and LT systems and they draw power at 11 kV

from 66/11 kV substations of Transmission Company.

The costs collected for various elements of distribution business are discussed

below:

(i) 11 kV and LT System a) 11 kV Lines (Overhead)

The costs furnished by the utility for the 11 kV lines being constructed by them are

obtained / validated as given in Table 4.37 below:

Table-4.37

Costs of 11 kV Lines (Overhead) (Rs. in lakhs/km)

Sl. No.


1 11 kV line – with 55 mm2 AAAC on 8 meter PSCC poles with 50 meters span.

1.897 2.130

2 11 kV line with 34 mm2 AAAC on 8 meter PSCC poles with 50 meter span.

1.540 1.882

(b) 11 kV Underground Cable System

The 11 kV underground cables are used in MGVCL extensively. The costs furnished

by the utility for the 11 kV underground cables are given in Table-4.38

Table-4.38

Costs of 11 kV Underground System (Rs. in lakhs/km)

Sl. No.


1 Laying of 11 kV X LPE aluminium 3 core 185 mm2 including cost of cable and accessories per km.

12.70 9.63

The costs are less during 2008-09, as the cost of cables procured is less during

2008-09. The above cost do not include road restoration charges.

43

(c) LT lines (Overhead)

The costs of LT overhead lines obtained from the utility and validated are given in

Table-4.39 below:

Table-4.39

Costs of LT Overhead lines (Rs. in lakhs/km)

Sl. No.


1 3 Phase 5 wire line with 3x55mm2 + 2x34 mm2 AAAC 50 meter span as 8 meter PSCC poles. 2.086 2.426

2 3 Phase 5 wire line with 5x34 mm2 AAAC 50 meter span on 8 meter PSCC poles. 1.745 2.047

3 3 Phase 4 wire line with 3x55 mm2 +1x34mm2

AAAC 50 meter span on 8 meter PSCC poles. 1.840 2.158

4 3 Phase 4 wire line with 4x34 mm2 AAAC with 50 meter span on 8 meter PSCC poles. 1.486 1.768

5 Single Phase 3 wire line with 3x34 mm2 AAAC 50 meter span on 8 meter PSCC poles 1.278 1.538

6 Single Phase 2 wire line with 2x34 mm2 AAAC with 50 meter span on 8 meter PSCC poles 1.044 1.281

LT Underground Cable System

The utility is not having LT underground cables system.

(ii) 33/11 KV Substations (Receiving Stations) As mentioned earlier the utility manages only 11 kV and LT system and draws power

at 11 kV from 66 / 11 kV substations of Gujarat Transmission Corporation. Hence,

the utility does not have 33 kV system.


The utility installs only 25 KVA, 63 KVA, and 100 AVA 11 KV/433 V distribution

transformer stations.

The cost of distribution transformer stations including the cost of installation, cabling

AB switch etc., as obtained from the utility and validated are given in Table-4.40

below:

44

Table –4.40

Costs of Distribution Transformer Stations (Outdoor) (Rs. Lakhs)

S. No

Details Costs as obtained/validated2007-08 2008-09

1 Installation of 25 KVA, CSP Distribution Transformer station

1.083 1.287

2 Installation of 63 KVA CSP distribution transformers station

1.644 1.74

3 Installation of 100 KVA CSP Distribution Transformers station

2.087 2.230

(iv) Metering Equipment and Meters

The cost of metering equipment and meters as furnished by the utility are given in

Table-4.41 below:

Table – 4.41

Costs of Metering Equipment and Meters (Rs. each)

S.No Details Cost of Metering Equipment and meters as obtained

2006-07 2007-081 11 KV CT/PT Set 34,300 -2 HT Trivector meter 3680 38103 LT 3 phase meters 2729 -4 LT single phase meter 809 810

For 11 kV metering the cost of metering equipment and trivector meters is to be

considered together.


The service line charges are generally standardised based on the class of consumer

and the costs being adopted by the utility are given in Table-4.42 below:

Table –4.42

Service Line Costs S. No

Details Cost in Rs. 2007-08 2008-09

1 Single phase service (upto 6 kW) 1760 23822 Single phase street light connection 1900 25623 Three phase service connection upto 5 HP 8440 7764*4 Three phase service connection 5 HP to 10 HP 8890 8428*5 Three phase service connection 10 HP to 20 HP 9340 8748*6 Three phase service connection 20 HP to 60 HP 12530 143947 Three phase service connection 60 HP and above 14670 17884

*The reduction in the cost in 2008-09 is due to reduction in the cost of 3 phase static meters. The benchmark costs for various elements in distribution business, detailed above

are discussed in Chapter-5 on evaluation of the costs from other utilities.

45

6. Madhya Pradesh Paschima Kshetra Vidyuth Vitaran Company Limited (MPPKVVCL), Indore

The Distribution companies in Madhya Pradesh operate distribution voltages of 33

kV, 11 kV and LT.

The costs collected from MPPKVVCL for various components of distribution business

is discussed below:

i) 33 kV, 11 kV and LT Network (a) 33 kV lines (overhead)

The costs of 33 kV lines (overhead) being constructed by MPPKVVCL are obtained

and validated and the costs are given in Table-4.43 below:

Table-4.43

Costs of 33 kV lines (Overhead) (Rs.lakhs/km.)

Sl. No. Details

Costs as obtained/ validated

2007-08 2008-09 1 33 kV line with 80 mm2 (Raccoon ) ACSR over 9.1

meter PSCC poles with 100 meter span. 2.79 2.76

2 33 kV line with 100 mm2 (Dog) ACSR over 9.1 meter PSCC poles with 100 meter span.

2.94 3.06

The utility has no 33 kV underground system.

(b) 11 kV lines (overhead)

The costs of 11 kV lines (overhead) obtained from the utility and validated are given


Table-4.44

Cost of 11 kV lines (overhead) (Rs. in lakhs/km)

Sl. No. Details Costs as obtained/validated

2007-08 2008-09 1 11 kV line with 50 mm2 (Rabbit ) ACSR over

8 meter PSCC poles with 100 meter span. 1.78 1.95

The utility has no 11 kV underground system.

46

(c) LT Lines (Overhead)

The costs obtained from the utility and validated for LT overhead lines are given in

Table-4.45 below:

Table-4.45

Costs of LT Lines (overhead) (Rs. in lakhs/km)

Sl. No.

Details Costs as obtained/ validated

2007-08 2008-09

1 3 phase 5 wire line with 4x 50 mm2 and 1x30 mm2 ACSR over 8 meter PSCC poles with 67 meter span

2.42 2.53

2 3 phase 5 wire line with 3x 50 mm2 and 2x30 mm2 ACSR over 8 meter PSCC poles with 67 meter span

2.31 2.42

3 3 phase 5 wire line with 5x 30 mm2 (Weasel) over 8 meter PSCC poles with 67 meter span

1.98 2.08

4 3 phase 4 wire line with 3x50mm2 + 1x30mm2 ACSR over 8 meter PSCC poles with 67 meter span

1.85 2.17

5 Single phase 3 wire line with 3x30mm2 ACSR over 8 meter PSCC poles with 67 meter span

1.68 1.77

d) HVDS Scheme

HVDS scheme is conversion of existing LT system to 11 kV system and installation

of 10, 16 and 25 kVA three phase transformers replacing the existing 63 kVA, 100

kVA and 200 kVA three phase transformers. The costs of conversion of existing LT

lines to 11 kV and 6.6 kV and installation of 10 to 25 kVA transformers are as given


Table-4.46

Conversion Costs HVDS Scheme (Rs. in lakh)

Sl. No.


Transformers 1 25 kVA 11 kV/433 V distribution transformer

installed on single pole structure - 1.19

2 16 kVA 11 kV/433 V distribution transformer installed on single pole structure

- 1.06

3 10 kVA 11 kV/433 V distribution transformer installed on single pole structure

- 0.88

Conversion Cost of LT line to 11 kV (Cost / Km.)

4 Conversion of existing LT line to 11 kV on existing poles and conductor per km.

- 0.46

5 Conversion of existing LT line to 11 kV with introduction of additional poles and replacement of conductor (weasel) per km.

- 1.51

6 Conversion of existing LT line to 6.6 kV single phase two wire line on existing poles and replacement of conductor per km.

- 0.55

47

The net conversion costs of LT line to 11 kV and replacement of existing 100 kVA

and 200 kVA transformers with 16 kVA and 25 kVA transformers within the feeding

area of 100 kVA transformer and 200 kVA transformer are as given in Table-4.47

below: The costs are net on giving credit to the existing 100 kVA and 200 kVA

transformers.

Table-4.47

Costs of HVDS (Conversion of LT to 11 kV line etc.) (Rs. in lakhs)

Sl. No. Details

Net cost obtained / validated 2008-09

Conversion costs LT to HT

1 Conversion cost of LT line to 11 kV and replacement of 100 kVA transformer with required number of 25 kVA transformers.

10.31

2 Conversion cost of LT line to 11 kV and replacement of 200 kVA transformer with required number of 25 kVA transformers.

12.74

The costs are net after giving credit to the released 100 kVA and 200 kVA

transformers.

(ii) 33/11 kV Substations (Receiving Stations)

The utility installs 33/11 kV substations with transformer capacities of 1.6 MVA, 3.15

MVA and 5 MVA. The substations are constructed with 1x1.6 or 1x3.5 MVA or 1x5

MVA transformer initially and additional transformer added based on load

development. The provision is made in the substation layout for the second

transformer, switchgear etc.

The costs of 33/11 kV substations as obtained from the utility and validated with

break-up costs of (i) land (ii) civil works (iii) equipment and material costs and

(iv) labour, establishment etc., are given in Table-4.48 below:

48

Table-4.48

Break-up Costs of 33/11 kV substations (Rs. in lakh/each)

Sl. No. Details

Cost as obtained/ validated

2007-08 2008-09 1 1x1.6 MVA transformer substation

i) Land - -ii) Civil works control room, compound wall, bore well

etc. 8.78 9.22

iii) Cost of equipment foundation, cabling, single phasing AB switch etc. 39.54 41.50

iv Labour, establishment, contingencies etc. 5.33 5.00 Total cost 53.65 55.72

2 1x3.15 MVA transformer substation i) Land - -ii) Civil works including control room, compound wall

etc. 9.27 12.3

iii) Equipment structures etc., including cabling 56.64 50.96iv) Labour, establishment, transport and other

contingencies etc. 7.85 7.06

Total Cost 73.76 70.32v) Capacitor bank 3.28 3.30

Substation with capacitor bank 77.04 73.623 1x5 MVA transformer substation

i) Land - -ii) Civil works including control room, compound wall

etc. 12.00 12.80

iii) Equipment, substation structures, cabling etc. 80.25 72.00*iv) Labour, establishment, transport etc. 10.22 9.45

Total 102.47 94.25v) Capacitor bank etc. 4.00 4.00

Total cost 106.47 98.70* The equipment cost in item 3 (iii) for 2008-09 is less due to the reduced cost of power transformer.


The utility installs distribution transformer stations with 16 kVA, 25 kVA, 63 kVA, 100

kVA and 200 kVA distribution transformers.

The costs of distribution transformer stations installed with different capacities of

transformers as obtained from the utility are given in Table-4.49 below. The costs

include structure, cabling etc.

49

Table-4.49

Costs of 11 kV/0.4 kV DTR stations (Rs. in lakh/each)

Sl. No. Details

Cost as obtained / validated 2007-08 2008-09

1 16 kVA, 11 kV/433 V distribution transformer on 8 meter PCC poles 1.04 1.09

2 25 kVA 11/433 V distribution transformer on 8 meter PCC poles 1.09 1.33

3 63 kVA 11 kV/433 V transformer on 8 meter PCC poles 1.45 1.75

4 100 kVA 11 kV/433 V transformer on 8 meter PCC poles 1.94 2.35


The costs of metering equipment and meters as obtained from the utility are given in

table 4.50 below:

Table-4.50

Metering Equipment and Meters (Rs. each)

Sl. No. Details

Costs of procurement2007-08 2008-09

1 33 kV metering equipment and metering 0.99 1.042 11 kV metering set 0.81 -3 Trivector meters 0.059 -4 LT 3 Phase meters - -5 LT Single phase meters 0.009 -

In the case of 33 kV and 11 kV the cost of Trivector meter to be added to the cost of

metering equipment.

50

7. Madhya Pradesh Madhya Kshetra Vidyuth Vitaran Company Limited (MPMKVVCL), Bhopal

As mentioned earlier under MPPMKVVCL the distribution companies in Madhya

Pradesh operate 33 kV, 11 kV and LT systems under distribution.

The costs of various elements of Distribution business are discussed below:

(i) 33 kV, 11kV and LT Lines

(a) 33 kV Lines (Overhead)

The costs of 33 kV lines (overhead) as being constructed by the utility as obtained

from the utility and validated are given in Table-4.51 below:

Table-4.51

Costs of 33 kV Lines (Overhead) (Rs. in lakhs/km)

Sl. No.


1 33 kV line with 80 mm2 ACSR over 9.1 meter PCC Poles with 100 meter span.

3.05 3.38

2 33 kV line with 100 mm2 ACSR over 9.1 meter PCC poles with 100 meter span

3.38 3.77

(b) 11 kV Lines (overhead)

The costs of 11 kV lines (overhead) as being constructed by the utility as obtained

from the utility and validated are given in Table-4.52 below:

Table-4.52

Cost of 11 kV Lines (overhead) (Rs. in lakhs/km)

Sl. No.


1 11 kV line with 50 mm2 ACSR over 8 meter PCC Poles with 100 meter span.

2.38 2.50

51

(c) LT Lines (Overhead) The utility constructs three phase LT 5 wire and 4 wire lines with different sizes of

conductors and supports.

The costs obtained / validated from the utility for the LT overhead lines are given in

Table-4.53 below:

Table-4.53

Costs of LT Lines (overhead) (Rs. in lakhs/km)

Sl. No.

Details

Costs as obtained / validated

2007-08 2008-009 1 3 phase 5 wire line with 4x 50 mm2 + 1x30 mm2

ACSR over 8 meter PCC poles with 67 meter span2.41 2.68

2 3 phase 5 wire line with 5x 30 mm2 ASCR over 8 meter PCC poles with 67 meter span

1.98 2.19

3 3 phase 4 wire line with 3x50 mm2 + 1x30 mm2 ACSR over 8 meter PCC poles with 67 meter span

2.10 2.30

(d) HVDS Scheme:

HVDS scheme is conversion of existing LT lines to 11 kV line on the existing

supports with same conductor or replacement of conductor in some cases and

replacing the existing 100 kVA or 200 kVA transformers with required number of 25

kVA transformers. This is being implemented in the case of LT lines feeding

agricultural pump sets.

The HVDS costs are provided in the cost data for 2007-08 but no works are taken up

sofar.

As per the cost data provided, the existing LT lines are converted to 11 kV with

replacement of conductor and introducing additional supports in some cases. The

existing 100 kVA and 200 kVA transformers replaced with required number of 25 kVA

transformers. The released transformers are returned to the stores giving credit.

As per the cost data, the net costs on the conversion of LT lines being fed by 100

kVA or 200 kVA transformers are given in Table-4.54 below:

52

Table-4.54

Cost of HVDS (Conversion of LT to 11 kV line etc.) (Rs. in lakhs)

Sl. No.

Details Net costs as per cost data 2007-08

1 The net cost of conversion of LT line to 11 kV and replacement of 100 kVA transformer with required No. of 25kVA transformers

9.82

2 The net cost of conversion of LT line to 11 kV and replacement of 200 kVA transformer with required No. of 25kVA transformers

12.13

(ii) 33/11 kV Substations (Receiving Stations) (Outdoor) The utility installs 33/11 kV substations with 1x1.6 MVA, 1x3.15 MVA and 1x5 MVA

power transformer initially with provision to install additional transformers based on

the load growth.

The costs for 33/11 kV substations as obtained from the utility and validated with

break-up costs of (i) land (ii) civil works (iii) equipment and material costs and

(iv) labour, establishment etc. are given in Table-4.55 below:

Table-4.55 Break-up Costs of 33/11 kV substations (Outdoor)

(Rs. in lakhs/each) Sl. No.

Details Costs as obtained/ validated

2007-08 2008-09 1 33/11 kV Substation with 1x1.6 MVA transformer

a) Land - -b) Civil works control room, compound wall etc. 9.76 11.23c) Equipment including, structure foundation costs, cabling

etc. single phasing AB switch etc. 38.38 37.11

d) Labour, establishment, transport etc. 5.30 5.40 Total including civil works 53.44 53.74

e) Capacitor bank - - Total 53.44 54.74

2 33/11 kV 1x3.15 MVA Transformer a) Land - -b) Civil works including control room, compound wall etc. 11.65 13.0c) Equipment, structures etc., including cabling 55.75 56.00d) Labour, establishment, transport etc. 7.91 7.94

Total Cost including civil works 75.31 76.94e) Capacitor bank 1.90 2.0

Total 77.21 78.943 33/11 kV SS with 1x5 MVA power transformer

a) Land - -b) Control room, compound wall and other civil works 12.15 13.0c) Equipment including structures, foundations and cabling

etc. 74.75 65.26*

d) Erection, Establishment, transport etc. 10.58 9.24 Total 97.48 87.50

e) Capacitor bank etc. 3.4 3.4 Total cost 100.88 90.88

* The equipment cost in item 3 (iii) for 2008-09 is less due to the reduced cost of power transformer as per turn key contract.

53

For purpose of benchmark costs, the installation of substation with single transformer

will be considered as the utility constructs the substations mostly with single

transformer and later provides additional transformer. The additional cost is

benchmarked separately.


The utility installs transformer stations with transformer capacities of 16 kVA, 25 kVA,

63 kVA and 100 kVA.

The costs of distribution transformer stations (outdoor) as obtained from the utility

and validated are given in Table-4.56 below:

Table-4.56

Costs of Distribution transformer Stations (outdoor) (Rs. in lakhs/each)

Sl. No. Details Costs as obtained/ Validated

2007-08 2008-09 11 kV/433 V outdoor transformer stations

with 8 meter PCC poles double pole structure.

(i) 16 kVA station 1.11 1.32(ii) 25 kVA station 1.21 1.45(iii) 63 kVA station 1.54 1.88(iv) 100 kVA station 1.95 2.47

54

8. Uttarkhand Power Company Limited (UPCL)

The Uttarkhand Power Company Ltd, a distribution company in Uttarkhand operates

33 kV, 11kv, &LT voltages under distribution. The terrain in the state being hilly the

construction standards and the costs of lines and substations are comparatively high.

The costs of various elements of distribution business as obtained / validated are

discussed below.

(i) 33kv, 11kv & LT lines (Overhead)

(a) 33kv lines (Overhead) The 33kv lines are constructed with steel tubular poles as against PSCC poles in

most of the other states. The steel tubular poles are much costlier than PSCC poles. The costs of 33kv lines as obtained from the utility are given in Table-4.57 below:

Table-4.57

Costs of 33kv lines (over head) (Rs lack/km)

S. No Details


2007-08 2008-091. 33kv line with 100mm2 ACSR over 9 meter steel tubular

(ST) poles 50 meter span with 7/16 SWG steel ground wire 7.69 8.74

2. 33kv line with 100 mm2 ACSR over 11 meter ST poles with 58 meter span with 7/16 SWG steel/ground wire.

10.15 12.95

(b) 11kv lines (Overhead) The costs of 11 kV lines as obtained from the utility and validated are given in the

Table-4.58 below:

Table-4.58

Costs of 11 kV Lines (Rs lakh/km)

S. No Details


2007-08 2008-091. 11kv line with 50mm2 ACSR and 7/16 SWG steel ground

wire over ST poles with 50 meter span 4.10 5.13

2. 11kv line with 50mm2 ACSR and 7/16 SWG ground wire over ST poles with 60 meter span

3.04 3.88

55

(c) 11kv UG Cable

The costs of 11 kV UG cable system as obtained from the utility and validated are


Table-4.59

Cost of 11 kV UG Cable System (Rs lakh/km)

S. No Details


2007-08 2008-09 1. 11kV UG cable line with 3x120mm2 X LPE cable 11.4 12.32 2. 11 kV UG cable line with 3x185 mm2 X LPE cable 14.8 16.00

No road cutting charges are involved in the above costs.

(d) LT lines

The costs of LT lines as obtained from the utility and validated are given in Table4.60

below:

Table-4.60

Costs of LT Lines (Rs lakh/km)

S. No Details


2007-08 2008-09 1. LT 2 wire line with 2x30mm2 ACSR and 7/16 SWG ground

wire over ST poles with 40 meter span. 2.70 3.00

2. LT 3 wire line with 3x30 mm2 ACSR and 7/16 SWG earth wire over ST poles with 40 meter span i) Hilly area ii) plain area.

2.80 1.90

3.14 2.10

3. LT 3 Phase 5 wire line with 4x80mm2 ACSR and 7/16 SWG steel wire over ST poles with 40 meter span.

4.52 5.13

(e) LT AB Cable Lines

The costs of LT AB cable lines as obtained from the utility and validated are given in

Table-4.61 below:

Table-4.61

Costs of LT AB Cable Lines (Rs. lakhs/km)

S. No Details Costs as obtained / validated

2007-08 2008-09 1. LT AB cable 3x16 mm2 + 1x25 mm2 over ST poles

with 50 meter span i) Hilly area ii) Plain area

3.1 2.76

3.45 3.09

2. S Phase 2 wire A.B cable 1x16 +1x25 mm2 over 8 meter ST pole with 50 meter span i) Hilly area ii) Plain area

2.08 1.56

2.33 1.75

56

As mentioned above the lines in the utility area are being constructed over steel

tubular poles, with shorter spans (50 meters) and an earth wire (steel wire) in

addition to ACSR power conductors. The cost / km is much higher than the cost of

similar voltage lines constructed by other utilities with AAAC / ACSR over PSCC /

RCC poles with longer spans (60 to 100 meters) and without continuous steel earth

wire. Hence the costs in Uttarkhand cannot be compared with the costs in other

utilities to benchmark the costs.

(ii) 33/11 KV Substations (Receiving Stations)

The utility constructs 33/11 kV substations with a single transformer of 3 MVA, 5

MVA and 8 MVA capacity initially and additional transformer is added or the

transformer capacity enhanced from 3 MVA to 5 MVA and 5 MVA to 8 MVA based on

the load development.

The costs obtained from the utility and validated with break-up costs for (i) land

(ii) civil works (iii) equipment and (iv) erection, establishment and other expenses are

given in the Table – 4.62 below:

Table – 4.62 Break-up costs of 33/11 KV Substations

(Rs. In lakhs) S.No Details Costs as obtained /

validated 2007-08 2008-09

1 33/11 KV substation with 1x3.15 MVA Transformer i) Land - -ii) Control room, compound wall and other Civil works 20.5 21.00iii) Equipment structures, cabling, etc. 47.11 47.25iv) Erection, establishment and other costs 15.17 15.25

Total 82.78 83.502 33/11 KV substation with 1x5 MVA transformer

i) Land - -ii) Control room, Compound wall etc 23.10 23.50iii) Equipment, structures, cabling etc. 79.61 75.60*iv) Erection, Estt. and other costs 25.65 26.72

Total 128.36 125.823 33/11 KV Substation with 1x8 MVA Transformer

(indoor)

i) Land - -ii) Control room, Compound wall and other civil works. 25.00 25.60iii) Equipment, Structures, cabling etc. 111.03 118.60iv) Erection, establishment and other charges 34.50 36.30

Total 170.53 180.50* The equipment cost in item 2 (iii) is less due to the reduced cost of power transformer.

The utility is not erecting any capacitor bank in the substations.

57

(iii) Distribution Transformer Stations

The utility installs Distribution Transformer stations with single phase 16 KVA and

three phase transformers of 25 KVA, 63 KVA, 100 KVA, 250 KVA and 400 KVA.

The costs of installation of distribution transformer stations as obtained from the utility

and validated are given in Table – 4.63 below.

Table- 4.63

Costs of Distribution Transformer Stations (Outdoor) (Rs. in lakhs)

S.No Details Costs as obtained/

validated 2007-08 2008-09

1 11 KV / 433 V, 400 KVA DTR station on steel supports 7.04 8.002 11 KV / 433 V, 250 KVA DTR station on steel supports 4.84 5.503 11 KV / 433 V, 100 KVA DTR station on steel supports 2.10 2.394 11 KV / 433 V, 63 KVA DTR station on steel supports 1.45 1.655 11 KV / 433 V, 25 KVA transformer station on PSCC

poles 1.01 1.15


The costs of metering equipment and meters as furnished by the utility are given in

Table – 4.64 below:

Table-4.64

Costs of Metering equipment and Meters

S.No Details Cost (Rs.) 2008-09

1 33 KV metering PT 9150 (during 2004-05) 2 33kV CT 20915 (during 2006-07) 3 HT Trivector meters 5000 4 LT 3 phase meters 4900 5 LT 1 phase meters 960

The metering costs to 33 kV and 11 kV consumers are the cost of metering

equipment plus trivector meter cost.

58

9. West Bengal State Electricity Distribution Company

Limited (WBSEDCL)

WBSEDCL prepared cost data / cost estimates for 33kV system during 2003-04 and

updated the same during 2007-08. Similarly cost data / cost estimates were prepared

for 11kV and LT system during 2005-06 and updated during 2007-08. The cost data

provides for 30% extra in hilly area for additional labour charges etc. Cost escalation

at 10% per year is considered during estimation for any work of subsequent year on

the available cost data of earlier year, if cost data is not revised in that year. The cost

data is taken as basis for preparation of estimates for various works and for awarding

works on contract. Works are normally executed within the estimated costs.

The works are generally executed on labour contract i.e. the utility supplying all major

materials or partially turnkey contracts. The cost estimates prepared by the utility

based on the cost data and works as executed have been verified and found that the

completion costs are generally within the cost estimates.

For developing infrastructure in rural areas under Rajiv Gandhi Grameen

Vidyutikaran Yojana (RGGVY) works were awarded under turnkey contracts to

reputed contractors during 2008-09 after inviting open tenders for erection of 33/11kV

substations, 33kV lines, 11kV lines, LT lines and erection of distribution transformer

stations of various capacities. Tenders were called item wise separately for supply of

materials and erection charges. The costs at which the works were awarded are

either less or above estimated costs as the rates quoted are based on the terrain,

distance and area where the works are to be executed. The same procedure is being

continued during 2009-10 also. As these are the actual executed costs, these costs

can be compared with cost data estimates and can be considered for bench marking.

This is discussed in detail in Chapter-5.

The cost estimates, estimates prepared by them based on latest cost data and works

as executed have been verified and found that the completion costs vary about ± 0 to

15% on the cost estimate.

The costs as obtained and validated for each element of distribution business are

discussed below:

59

(i) 33kV, 11kV and LT lines

The utility manages only 33kV, 11kV and LT overhead network. Underground cable

lines are provided at railway crossings only.

The construction of the lines is generally awarded as partial turnkey contracts with

the utility supplying all major materials such as conductor, poles, insulators etc.

(a) 33kV lines

The utility has standardized the construction of 33kV overhead lines on 9 meter PCC/

12.8 Meter Rail Poles with 100 mm2 ACSR / AAAC (maximum span = 100 meter).

The utility prepared cost data updated upto 2007-08 and the utility is erecting 33kV

lines mainly with 100 mm2 ACSR on 9 meter PCC poles.

The costs per Km of line as obtained from the utility are given in Table 4.65 below:

Table – 4.65

Costs of 33kV lines ( Rs. Lakh/ Km)

S.N Item Cost obtained / validated 2006-07 2007-08

1. Erection of 33kV line with 100 mm2 ACSR over 9 meter PCC poles

(Max span 100 meter) 3.67 3.84

It is observed that generally the accounts for completed works do not cover all items

of work and do not fully reflect the cost in number of cases. In such cases the cost of

such materials as per cost data or as per procurement cost is taken for validation.

Rail poles are used mainly in urban areas where both 33kV & 11kV and some times

LT lines also are to be strung on the same supports. 100 mm2 AAAC is also used as

it is comparatively cheaper than 100 mm2 ACSR.

The cost of 33kV line using rail poles and 100 mm2 AAAC are as furnished below:

(Rs. lakhs/Km.) 1. Erection of 33kV line with 100 mm 2 ACSR on 12.8

meter Rail poles with maximum span of 100 meter (as per cost data of 2007-08)

5.2

2. Erection of 33kV line with 100 mm2 AAAC on 9 meter PCC pole with maximum span of 100 meter (as per cost data of 2007-08)

3.1

60

During 2008-09, erection of 33kV lines with 100 mm2 ACSR on 9 meter PCC poles

are awarded on turnkey contracts. The cost per Km of line awarded under some

packages in some districts are as given in Table-4.66 below:

Table-4.66

Costs as per Turn Key Contracts (Rs. lakhs/km)

S.N District Cost Material Labour Total

1 Birbhum 3.38 0.45 3.83 2 Purbamidnapur 3.59 0.41 4.00 3 Hoogly 3.78 0.34 4.16 4 Malda 3.81 0.41 4.215 Raghunathganj-II Block 4.26 0.10 4.36 6 Coochbehar 4.20 0.19 4.38

Average cost = 4.16 The comparative costs as per cost data and as per turnkey contract are given below:

(Rs.lakh/km)

S. N Item

As per cost data during

2007-08

Cost with 10%

escalation for 2008-09

Cost as per turnkey contract

Minimum Maximum

1 33kV line with 100 mm2 ACSR on 9M PCC poles (Max span 100 M)

3.84 4.32 3.83 4.38

The variation in cost is due to transport of materials and erection of lines in difficult

terrain.

As the cost as per turnkey contract is the actual executed cost during 2008-09 these

costs can be considered for bench marking the cost of 33kV lines in WBSEDCL.

(b) 11kV lines

The utility has standardized the construction of 11kV overhead lines as furnished

below: (i) 11kV line with 50 mm2 ACSR on 8 meter PCC poles with 75 meter span in plain area.

(ii) 11kV line with 50 mm2AAAC on 8 meter PCC poles with 75 meter span in plain area.

(iii) 11kV line with 30 mm2ACSR on 8 meter PCC poles with 100 meter span in plain area.

(iv) 11kV line with 30 mm2AAAC on 8 meter PCC poles with 100 meter span in plain area.

(v) 11kV line with 50 mm2ACSR on steel tubular poles with 75 meter span in hilly area.

(vi) 11kV line with 30 mm2 ACSR on steel tubular poles with 75 meter span in hilly area.

61

The utility is erecting the 11kV lines mainly with 50 and 30 mm2 ACSR on 8 meter

poles with a maximum span of 75 meter and 95 meter respectively. The costs of 1

Km of 11kV line as obtained from the utility are given in Table 4.67 below:

Table-4.67

Costs of 11kV Lines (Rs. lakh/Km)


1. 11kV line with 50 mm2 ACSR on 8 meter PCC poles (Max span 75 meter)

2.11 2.21

2. 11kV line with 30 mm2 ACSR on 8 meter PCC poles (Max span 100 meter).

1.50 1.60

The cost of other types of 11kV overhead lines as per cost data of 2007-08 are also

furnished below:

(Rs. lakh/Km) 1. 11kV line with 50 mm2 AAAC on 8 meter PCC poles in plain

area (Max span 75 meter) 1.98

2. 11kV line with 30 mm2 AAAC on 8 meter PCC poles in plain area (Max span 100 meter)

1.43

3. 11kV line with 50 mm2 ACSR on steel tubular poles in hilly area (Max span 75 meter)

2.90

4. 11kV line with 30 mm2 ACSR on steel tubular poles in hilly area (Max span 75 meter)

2.47

During 2008-09, erection of 11kV lines mainly with 50 mm2 and 30 mm2 ACSR on 8

meter PCC poles and at some places in Howrah dt, erection of 11kV line with 3X95 +

1X180 mm2 AB cable are awarded as turnkey contracts. The costs per Km. lines

awarded under some packages in some districts are as given in Table 4.68 below:

Table – 4.68 11kV line with 50 mm2 ACSR

(Rs. lakh/Km)


1 Purbamidnapur 1.88 0.29 2.17

2 Hoogly 2.18 0.26 2.43

3 Birbhum 2.08 0.37 2.46

4 Malda 2.09 0.38 2.47

5 Raghunathganj-II Block 2.55 0.10 2.65

62

11kV line with 30 mm2 ACSR (Rs. lakh/Km)


1 Jalpaiguri 1.37 0.28 1.65 2 24-Paraganas (South) 1.53 0.21 1.74 3 Bardhman 1.53 0.25 1.774 Hoogly 1.56 0.22 1.78 5 Birbhum 1.61 0.25 1.87 6 Coochbehar 1.73 0.21 1.94 7 Birbhum 1.73 0.22 1.96 8 Howrah 1.80 0.27 2.07

The comparative costs as per cost data and as per turnkey contract are given below:

(Rs. lakh/Km)

S.N Item As per cost data during

2007-08

cost with 10%

escalation for 2008-09

Cost as per turnkey contract

Minimum Maximum

1 11kV line with 50 mm2 ACSR (Max span 75 meter)

2.21 2.43 2.17 2.65

2 11kV line with 30 mm2 ACSR on 8M poles (Max span 95 meter)

1.60 1.76 1.65 2.07

3 11kV line with AB cable (Max span 55 meter)

- - 3.03

The variation may be due to transportation and erection in difficult terrains and

sensitive areas. These are completion costs during 2008-09 and so these costs can

be considered for bench marking of erection of 11kV lines in WBSEDCL.

(c) LT Lines

The utility has standardized the following norms for construction of low & medium

voltage (LT & MV) overhead lines. (i) 3Ph 4wire line with 50 mm2 AAAC on 8 meter PCC poles in plain area with 65 meter

span.

(ii) 3Ph 4wire line with 25 mm2 AAAC on 8 meter PCC poles in plain area with 60 meter

span.

(iii) 3Ph 4wire line with 20 mm2 ACSR on 8 meter PCC poles in plain area with 95 meter span

(For STW).

(iv) 1Ph 2 wire line with 25 mm2 AAAC on 8 meter pole PCC poles in plain area with 45 meter

span plain area.

(v) 3Ph 4wire line with 25 mm2 AAAC on 9 meter steel tubular poles in hilly area with 45

meter span . (vi) 1Ph 2 wire line with 25 mm2 AAAC on steel tubular poles in hilly area with 45 meter span.

63

The utility is erecting LT lines mainly with 25 mm2 AAAC and 20 mm2 ACSR over 8

meter PCC poles.

The costs per KM of LT lines as obtained from the utility are given in Table 4.69

below:

Table – 4.69 Costs of LT lines

(Rs. lakh/Km) S.N Item Cost obtained / validated

2006-07 2007-081 3Ph 4wire line with 25 mm2 AAAC on 8

meter PCC poles (Max span 45 meter) 1.84 2.05

2 3Ph 4wire line with 20 mm2 ACSR on 8 meter PCC poles (Max span 85 meter)

1.41 1.41

The costs of construction of other types of LT lines are also given below:

(Rs. lakh/Km) 1 3Ph 4wire line with 50 mm2 AAAC on 8 meter PCC poles

in plain area (Max span 45 meter)2.73

2 1Ph 2wire line with 25 mm2 AAAC on 8 meter poles on PCC in plain area (Max span 45 meter).

1.65

3 3Ph 4wire line with 25 mm2 AAAC on steel tubular poles in hilly area (Max span 45 meter).

2.96

4 1Ph 3 wire line with 25 mm2 AAAC on steel tubular poles on hilly area (Max span 45 meter).

2.50

During 2008-09 erection of LT lines is standardized with 25 mm2 AAAC and works

were awarded on turnkey contract for erection of LT 3 Ph 4wire and LT 1Phase 2

wire lines on 8 meter poles with 45 meters span. The costs per km of line awarded

under some packages in some districts are given in Table 4.70 below:

Table – 4.70 LT 3Ph 4wire line with 25 mm2 AAAC

(Rs. lakh/Km)


1 Bardhman 1.99 0.41 2.40 2 Birbhum 1.99 0.48 2.47 3 Hoogly 2.14 0.40 2.54 4 Coochbehar 2.18 0.36 2.54 5 24- Paraganas (South) 2.26 0.39 2.65 6 Birbhum 2.20 0.46 2.66 7 Howrah 2.26 0.57 2.83

64

LT 1Ph 2 wire line with 25 mm2 AAAC (Rs. lakh/Km)


1 Bardhman 1.60 0.37 1.98 2 Birbhum 1.73 0.34 2.07 3 Hoogly 1.64 0.46 2.11 4 Coochbehar 1.77 0.39 2.16 5 24- Paraganas (South) 1.82 0.38 2.21 6 Birbhum 1.78 0.45 2.23 7 Howrah 1.81 0.56 2.38

The costs as per turnkey contract are the completion costs during 2008-09 and so

these costs can be considered for benchmarking of erection of LT lines.

(ii) 33/11kV Substations

The WBSEDCL has standardized the substations with the following transformer

capacities and 11kV outgoing feeders.

(i) with 2Nos. 3.15MVA power transformers and 4 Nos. 11kV feeders.

(ii) with 2Nos. 6.3 MVA power transformers and 6 Nos. 11kV feeders.

Substations are out door spread out type. Power transformers are provided with one

33kV group control vacuum circuit breaker. Substation layout is also standardized.

The 33kV system is erected outdoor and the 11kV system inside the control room.

11kV switchgear-VCB, 7 or 9 panel (2 incoming, 1 bus coupler, 4 or 6 outgoing

feeders) with CTs, PT, relays and metering are provided.

Capacitor banks are not provided at 33/11kV substations.

Spacious control room with separate rooms for battery charger, stores, staff room,

rest room etc., are provided.

Substation costs as obtained from the utility are given in Table 4.71 below:

Table – 4.71

33/11kV substation costs (Rs. in lakhs)

S.N Item Cost obtained 2006-07 2007-08

1 33/11kV substation with 2X3.15 MVA transformers and with 4 Nos. 11kV outgoing feeders

148.33 182.38

2 33/11kV substation with 2X6.3 MVA transformers and with 6 Nos. 11kV outgoing feeders

184.28 208.72

65

The break-up of above costs of 33/11kV substation i.e (i) land (ii) civil works

(iii) equipment and materials and (iv) overheads are given in Table 4.72 below:

Table – 4.72

Costs break-up of 33/11kV Substation (Rs. in lakhs)

S.N Item 2007-08 2X6.3MVA 2X3.15MVA

1 Land 16.4 16.42 Civil works including control room 43.76 43.763 Equipment and materials 116.53 96.474 Labour charges for erection and

commissioning 6.83 4.90

5 Over heads such as contingencies, establishment, supervision charges etc

25.20 20.85

Total 208.72 182.38

During 2008-09, under RGGVY scheme, erection of 33/11kV substations is awarded

under turnkey contract. Most of the substations are with 2X3.15 MVA transformers.

The costs of works awarded under some packages in some districts are as given in

Table 4.73 below

Table – 4.73 33/11kV substation costs with 2X3.15 MVA transformers on turnkey contracts

(Rs. in lakhs) S.N District Cost

Material Labour Civil works Total1 Purbamidnapur 101.87 6.33 72.44 180.642 Birbhum 112.33 12.83 112.96 238.123 Coochbehar 150.57 17.62 117.07 285.264 Hoogly 133.42 16.95 83.37 233.745 Malda 126.00 8.12 118.59 252.716 Raghunathganj-II Block 163.88 2.10 41.48 207.46

Design and erection of substation is good but costs are high. Control room appears

to be much more than the requirement. Control room is provided with four rooms,

one each for stores, staff, toilets and staircase.

As more number of 33/11kV substations are going to be constructed under RGGVY

scheme mostly in rural areas, it may be economical to simplify the design of

substation so that less land i.e about ½ acre instead of 1.5 acre, (land is said to be

costly at about 20 to 30 lakhs per acre) and also simplify the control room to be a

smaller one.

As the above costs as per turnkey contract are the actual completion costs during

2008-09 and still being executed during 2009-10 also, these costs can be considered

66

for benchmarking. But some of the civil works such as land development; approach

roads etc may not be necessary at all the substations.

(iii) Distribution Transformer stations

The utility installs three phase distribution transformers of capacities 10KVA, 25 KVA,

63KVA, 100 KVA and 315 KVA. The transformers are erected on double pole

structures. Some times 100 KVA or 315 MVA transformers are erected on four pole

structures.


including structure, etc., as obtained from the utility are given in Table-4.74 below:

Table-4.74 Costs of distribution transformer stations

(Rs. in lakh/each) S.N Item Cost as obtained

2006-07 2007-08 1 11/0.4kV 10 KVA distribution transformer

stations - 0.80

2 11/0.4kV 25 KVA distribution transformer stations

0.80 0.86


1.27 1.32


1.62 1.70

During 2008-09, the utility awarded, erection of 11/0.4kV, 10 KVA and 25 KVA

distribution transformer stations on 8 meter PSC pole DPs on turnkey contracts.

The costs awarded under some packages in some districts as obtained are as given

below in Table 4.75.

Table - 4.75 Costs of distribution transformer stations

(Rs. in lakh/each) S.N District Cost

10 KVA Transformer 25 KVA Transformer 1 Coochbehar 1.07 1.23 2 Howrah 1.07 1.17 3 Birbhum 0.90 0.94 4 Birbhum 0.99 1.11 5 Bardman 0.87 1.11 6 24- Paraganas (South) 1.13 1.31 7 Hoogly 0.95 1.20 8 Jalpaiguri 0.78 0.96

The above are the completion costs during 2008-09 and be continuing during 2009-

10 also.

67



consumers as obtained from the utility are given in Table 4.76 below. The utility

installs only static meters of different capacities.

Table – 4.76

Costs of Meter equipment and meters (Rs. each)

S.N Item Cost 2007-08 2008-09

1 Indoor type metering switchgear with VCB and 3 phase PT and single phase CTs.

- 5,47,000

2 AC 3Ph, static trivector meter 13790 91703 3Ph 4 wire LT static whole current meter 20-100A

(TOD meter) 7525 9170

4 3Ph 4 wire LT static whole current meter 5-30A 7340 94185 1Ph 2 wire LT static whole current meter 5-30A - 1249

(v) Service Line Costs The service line costs are standardized for agricultural pumpsets. The metering

equipment will be borne by the DISCOM and the cost of balance materials required

for the service connection has to be borne by the consumer.

The standard estimate costs of pump connection are given in Table-4.77 below:

Table-4.77

Service Line Costs (In Rs.)

S.N Type of pump connection Estimate cost Consumer side DISCOM side Total

1 DTW pump connection 4782 2135 6917 2 RLI pump connection 5843 2404 8247 3 STW connection 2997 203 3200

The service line costs for other service connections are worked out in individual

cases based on the costs. Cost of Line up-to the Terminal Pole (service pole), if

required as per survey, has to be borne by the consumer as per cost data of relevant

year of WBSEDCL. From terminal pole, cost of service connection up-to 30.48 meter

is borne by WBSEDCL and cost of service connection beyond 30.48 meters is

collected from the consumer.

The costs of service connection for 1phase and 3phase, domestic, non domestic and

industrial service connections are as given below:

68

Sl.No. Item Cost in Rs.

(i) Service Connection Cost of LT domestic service:

a) Single Phase Rs 1913 +

Rs 1249 /- (cost of 1ph meter cost

with PP box)

b) Three Phase Rs 4798 +

Rs 9170 /- (cost of 3ph meter)

(ii) Service Connection Cost of LT Industrial and Commercial service:

a) With 3 phase whole current meter Rs 13493 /- +

Rs 9418 /- (cost of 3ph meter)

b) With CTs meter Service connection not given with CT

meter

(iii) Service connection Cost of 11 KV HT Industrial and Commercial service connection :

a) With series Trip meter (for

consumers having contract

demand up-to 120 KVA)

Rs 86,620 /- +

Rs 16,784 /- (cost of LT CT meter

including cost of CT)

b) With series Trip metering Switch

gear (for consumers having

contract demand beyond 120

KVA)

Rs 5,47,000 /- +

Rs 9170 /- (cost of CT Operated 11

KV HT TVM with TOD, Accuracy

Class 0.5)

c) With series Trip Ring Main

Switch-gear (for consumers

having contract demand beyond

120 KVA)

Rs 12,72,000 /- +

Rs 9170 /- (cost of CT Operated 11

KV HT TVM with TOD, Accuracy

Class 0.5)

69

10. Central Assam Electricity Distribution Company

Limited (CAEDCL) 11. Upper Assam Electricity Distribution Company

Limited (UAEDCL)

Though erstwhile Assam State Electricity Board (ASEB) was unbundled and three

DISCOMs namely Central Assam Electricity Distribution Company Limited, Upper

Assam Electricity Distribution Company Limited and Lower Assam Electricity

Distribution Company Limited were established, all the three DISCOMs are

functioning from the same premises in Guwahati. Inviting tenders for procurement of

major materials, preparation of cost data for various elements of rural electrification

works and inviting tenders for RGGVY works etc., are being done centrally by ASEB

which continues to be a holding company and all the DISCOMs are adopting the

same data for preparation of cost estimates or for awarding works. The State

Government is planning to merge all the three DISCOMs into one viz., Assam State

Electricity Distribution Company Limited (ASEDCL).

The Rural Electrification wing of ASEB prepares cost data / cost estimates for various

works such as construction of 33kV, 11kV & LT lines, 33/11kV substations,

distribution transformer stations, etc., every year. The cost data is updated yearly

based on the escalation in cost of equipment / material, labour charges, transport

and other establishment charges. An addition of 15% on the total cost is provided for

Karbi Anglong and North Coacher districts of Assam state because of communication

and transportation bottlenecks in these two districts with hilly terrain, difficult working

area, etc for RGGVY works. The cost data is taken as basis for preparation of

estimates for various works and for award of contracts.

From 2006-07, under Rajiv Gandhi Grameen Vidyutikaran Yojana (RGGVY) for

developing infrastructure in rural areas, works were awarded under turnkey contracts

to reputed contractors after inviting tenders for construction of 33/11kV substations,

33kV, 11kV and LT lines, distribution transformer stations of various capacities.

Tenders are invited item wise separately for supply of material and erection charges.

The costs at which the works were awarded are either less or more than estimated

costs as the rates quoted were based on the terrain, distance involved and other

local factors where the works are to be executed.

70

As these are the actual executed costs, these costs can be considered for bench

marking. This is discussed in detail in Chapter –5.

The cost estimates prepared by the utility based on latest cost data and the

completion costs of works as executed have been verified and found that the

completion costs vary about ± 0 to 20% on the cost estimates.

The costs as obtained / validated where required for each element of distribution

business are discussed below:

(i) 33 kV, 11 kV and LT Lines

The utility manages only 33kV, 11kV and LT overhead network.

(a) 33 kV Lines

The utility has standardized the construction of 33kV lines with AAA ‘Raccoon’

conductor with average span of 100 meters on 9.75 meter PSC poles (single pole

type) and on 10 meter steel tubular poles (double pole suspension type).

The utility is erecting 33kV lines mainly on 9.75 meter PSC poles with AAA Raccoon

conductor.

The costs per Km of line as obtained from the utility are given in Table 4.78 below:

Table – 4.78

Costs of 33kV Line (in Rs. lakh/ Km)

S.N Item Cost obtained/validated 2007-08 2008-09

1 33kV line with AAA “Raccoon’ conductor on 9.75 meter PSC poles (single pole type) with average span of 100 meters

5.42 6.42

The cost per KM of 33kV line with AAA ‘Raccoon’ conductor with a span of

100meters on 10 meters steel tubular poles (double pole suspension type) as per the

cost data for 2007-08 is Rs. 9.31 lakhs and for 2008-09 is Rs. 10.94 lakhs.

During 2008-09, erection of 33kV line with AAA “Wolf” conductor on 9.75 meter PSC

poles (double pole suspension type) with an average span of 50 meters are also

awarded on turnkey contract. The cost per km this line, awarded under some

packages in some districts are as given below:

71

(In Rs.lakh/Km)


1 Tinsukia 8.48 1.82 10.302 Dibrugarh 9.80 1.58 11.38

(b) 11kV lines

The utility has standardized the construction of 11kV lines as furnished below:

(i) 11kV line with AAA “Weasel” conductor on 8.5 meter PSC poles with an

average span of 100 meters.

(ii) 11kV line with AAA “Weasel” conductor on 8.5 meter RS Joist poles with an

average span of 100 meters.

(iii) 11kV line with AAA “Weasel’ conductor on 8.5 meter steel tubular poles with

an average span of 100 meters.

The utility is erecting the 11kV lines mainly with AAA “Weasel” conductor on 8.5

meter PSC poles with an average span of 100 meters. The cost per Km of 11kV line

as obtained from the utility is given in Table 4.79 below:

Table – 4.79

Costs of 11kV lines (in Rs. lakhs/kM)

S.N Item Cost obtained / validated2007- 08 2008-09

5. 11kV line with AAA “Weasel” conductor on 8.5 meter PSC pole (Average span 100 meter)

2.78 3.29

The cost of other types of 11kV lines as per cost data of 2007-08 and 2008-09 are

also furnished below:

(in Rs. lakhs/kM) 2007-08 2008-09

1. 11kV line with AAA “Weasel” conductor on 8.5 meter RS Joist pole (Average span 100 meter)

3.47 4.10

2. 11kV line with AAA “Weasel” conductor on 8.5 meter steel tubular pole (Average span 100 meter)

3.33 3.95

During 2008-09, erection of 11kV lines with AAA Raccoon conductor on 9.75 meter

PSC poles with average span of 50 meters are awarded on turnkey contracts. The

costs per KM of line awarded under some packages in some districts are as given

below:

(in Rs. lakhs/kM) S.N District Cost

Material Labour Total 1 Tinsukia 4.04 1.11 5.152 Dibrugarh 3.74 0.60 4.34

72

(c) LT lines The utility has standardized construction of 3phase 4 wire and 1phase 2 wire LT lines

with AAA “squirrel” conductor at an average span of 50 meters on 7.5 meter PSC

poles, RS Joists and steel tubular poles.

The costs per Km of LT line as obtained from the utility are given in Table 4.80

below:

Table – 4.80

Costs of LT Lines (In Rs. Lakhs/Km)

S.N Item Costs obtained 2007-08 2008-09

1 3Phase 4 wire LT line with AAA “squirrel” conductor on 7.5 meter PSC poles (Average span of 50 meters)

2.39 2.83

2 3Phase 4 wire LT line with AAA “squirrel” conductor on 7.5 meter RS Joists (Average span of 50 meters)

3.50 4.14

3 3Phase 4 wire LT line with AAA “squirrel” conductor on 7.5 meter steel tubular poles (Average span of 50 meters)

3.32 3.93

4 1Phase 2 wire LT line with AAA “squirrel” conductor on 7.5 meter PSC poles (Average span of 50 meters)

1.72 2.04

5 1Phase 2 wire LT line with AAA “squirrel” conductor on 7.5 meter RS Joists (Average span of 50 meters)

2.83 3.35

6 1Phase 2 wire LT line with AAA “squirrel” conductor on 7.5 meter steel tubular poles (Average span of 50 meters)

2.85 3.14


The utility has standardized the 33/11kV substations with the following transformer

capacities

(a) 1 No. 2.5 MVA power transformer

(b) 1 No. 3.15 MVA power transformer

(c) 2 Nos. 2.5 MVA power transformers

The 33/11kV substations are outdoor type only. Power transformer(s) provided with 1

No. 33kV circuit breaker for HV side protection. 11kV indoor type switchgear with 9

unit VCB panel (2 incoming, 1 bus coupler, 6 outgoing) is provided for transformer LV

and feeders protection at all substations. 9.75M PSC poles are used as structures.

Capacitor banks are not provided.

Control room of 120 Sq Meter is constructed. Staff quarters, stores, security office

are constructed where necessary and where space is available.

73

The costs of the 33/11kV substations as obtained from the utility are given in

Table- 4.81 below:

Table – 4.81

33 / 11kV substation costs ( Rs. in lakhs)


1. 33/11kV SS with 1X2.5 MVA power transformer 151.31 176.14 2. 33/11kV SS with 2X2.5 MVA power transformer 166.23 204.62 3. 33/11kV SS with 1X3.15 MVA power transformer 153.94 180.00

The break-up of above costs of 33/11kv substation i.e (i) land (ii) civil works

(iii) equipment and materials and (iv) overheads are as given below.

Cost break-up of 33/11kV Substations

(Rs. in lakhs) S.N Item Costs during 2008-09

1X2.5 MVA 2X2.5 MVA 1X3.15 MVA 1 Land 7.86 7.86 7.862 Civil works including control room 26.95 26.95 26.953 Equipment and materials 100.95 121.02 103.654 Labour charges 23.22 28.00 23.505 Overheads such as contingencies

on materials etc 17.14 20.79 18.04

Total 176.14 204.62 180.00

During 2008-09 erection of 33/11kV substations with 2X5.0 MVA power transformers

are also awarded under RGGVY scheme on turnkey contract. The costs awarded

under some packages in some of the districts are given below:

33/11kV substation costs with 2X5.0 MVA transformers on turnkey contract

(Rs. in lakhs)

S.N District Cost Material Labour Civil works Total

1 Tinsukia 178.55 18.01 77.35 273.922 Diburgarh 175.56 38.80 56.77 271.133 Bamunimaidan 191.65 31.19 28.18 251.02

(iii) Distribution transformer stations

The utility installs distribution transformer stations with transformer capacities of 25

KVA, 63 KVA and 100 KVA three phase and 16 KVA single-phase.

The transformers are erected on double pole structures with 8.5 meter PSC poles or

RS Joists.

74


including structure etc as obtained from the utility are given in Table 4.82 below:

Table – 4.82

Costs of Distribution Transformer Stations (Rs. in lakhs each)

S.N Item Costs obtained / validated 2007-08 2008-09

1. 11/0.433kV 25 KVA distribution transformer station on 8.5 meter PSC poles double pole structure

1.69 2.00


2.10 2.48


2.42 2.87

4. 6.6/0.220kV single phase 16 KVA distribution transformer station on 8.5 meter PSC poles double pole structure

1.36 1.61

During 2008-09, the utility has also awarded erection of distribution transformer

stations with capacities 25 KVA, 63 KVA and 100 KVA three phase transformers on

turnkey contract. The costs per each transformer station under some packages in

some of the districts are given below:

Distribution transformer station costs on turnkey contract

(in Rs. Lakhs/each) S.N District 25 KVA 63 KVA 100 KVA 250 KVA 1 Tinsukia 2.05 2.39 2.56 -2 Diburgarh 2.54 5.37



consumers as obtained from the utility are given below. The utility installs only static

meters of different capacities for LT consumers and trivector meters for HT

consumers. The costs are given in Table 4.83 below:

Table 4.83 Costs of metering sets and meters

(In Rs.)

S.N Details Costs as obtained 2007-08 2008-09

1 11kV CT/PT set 31744 317442 Static trivector meter 14780 147803 LT 3phase meter (CT type) 5920 59204 LT 3phase meter (Electronic) 4752 47525 LT single phase meter (Electronic) 1234 1234

75

(v) Service Lines

The service line costs are standardized for single-phase installations upto 60W load

to Below Poverty Line (BPL) rural household at Rs. 1800-00 per each connection.

The service line costs for other domestic, industrial and commercial services and HT

consumers are worked out in individual cases based on the load length of line etc.

The costs as obtained / validated are given in Table 4.84 below:

Table-4.84

Service Lines Costs (Rs. each)

S.N Details 2007-08 2008-091 Service connections of domestic and non domestic

(single phase) with electronic meters 2976 2976

2 Service connections of domestic and non domestic (three phase) with electronic meters

9642 9642

3 Service connections for industrial service (above 25 kVA,HT)

183930 183930

76

12. Southern Electricity Supply Company of Orissa Ltd.

(SOUTHCO)

The distribution companies in Orissa manage 33 kV, 11 kV and LT network under

distribution. The utility prepares cost data / cost estimates for various elements in

distribution business – 33/11 kV substations, distribution transformer stations, 33 kV,

11 kV and LT lines etc., and updates the data yearly based on input costs. The

Orissa Electricity Regulatory Commission (OERC) has approved the cost data for

different works of the distribution system in 2005-2006. Subsequently every year the

cost of various materials used for the cost data are approved by the Commission for

adoption in the cost analysis. This cost data / cost analysis is adopted for preparation

of estimates for works and award of contracts either on turnkey basis or on partial

turnkey basis.


(i) 33 kV, 11 kV and LT lines (overhead)

The construction of lines is generally awarded on partial turnkey basis with major

material supplied by the utility and the erection by the contractor along with supply of

minor materials. The major works at present are carried out by M/s NTPC, NHPC

and PGVCL under RGGVY programme. The distribution company is executing some

works under system improvement and other schemes.


The utility has standardised the construction of 33 kV line with 100 mm2 AAAC

conductor on 9.1 meters PSCC poles with 100 and 70 meter spans in rural areas. In

urban areas lines with 70 meter span length over 9.1 meter PSCC poles is generally

adopted. 33 kV UG cable works are not carried out by the utility in the recent years.

The cost per km of line as obtained from the utility and validated are given in Table-

4.85 below:

77

Table-4.85

Costs of 33 kV Lines (Overhead) (Rs. In lakhs/km)


2007-08 2008-09


2.70 2.74


3.07 3.22

(b) 11 kV Overhead Lines The utility adopts the following norms for construction of 11 kV lines:

11 kV line with 34 mm2 and 55 mm2 AAAC on 9.0 and 8.0 meter supports with 100

and 70 meter spans. Lines with 80 mm2 AAAC are also constructed for some 11 kV

overloaded lines. Cost data is also available with 9 meter long 100X 116 mm RS

joists. The line with 70 meters span is most common. No underground cable works

for 11 kV lines are carried in the utility except for the railway crossings.


below:

Table-4.86

Costs of 11 kV Overhead Lines (Rs. In lakh/km)

Sl. No. Details

Costs obtained / validated 2007-08 2008-09


1.807 1.922


1.987 2.09


1.553 1.57


1.67 1.69

(c) LT Overhead Lines


(i) 3 phase 5 wire line with 3x55 mm2 + 2x34 mm2 AAAC on 8.0 meter PSCC

poles with 50 meter span.

(ii) 3 phase 5 wire line with 5x34 mm2 AAAC on 8.0 meter PSCC poles with 50

meter span.

78

(iii) 3 phase 4 wire line with 4X55 mm2 AAAC over 8.0 meter PSCC poles with 50

meter span

(iv) 3 phase 4 wire line with 4x34 mm2 AAAC over 8.0 meter PSCC poles with 50

meter span.

(v) Single phase 3 wire line with 3x34 mm2 AAAC over 8.0 meter PSCC poles with

50 meter span.

(vi) Single phase 2 wire line with 2x34 mm2 AAAC over 8.0 meter PSCC poles with

60 meter and 65 meter span


(i) 3 phase 5 wire with 55 mm2 AAAC

Urban areas for 3 phase supply (4 wires) and for street light supply (5th wire).

(ii) 3 phase 5 wire with 34 mm2 AAAC

Rural areas for 3 phase supply (4 wires) and for street light supply (5th wire).


For supply to Agricultural pump sets and other loads 3 phase loads.



(v) Single phase 3 wire line with 34mm2

For single phase supply loads (2 wire) and street light (3rd wire). Used in urban and rural areas with single phase loads and street light connections.

(vi) Single phase 2 wire line with 34 mm2


The costs of LT overhead lines being commonly constructed by the utility are given in

Table-4.87 below:

Table-4.87

Costs of LT Overhead Lines (Rs. In lakh/km)

Sl. No.


1 LT 3 phase 5 wire line with 5x34mm2 AAAC with 50 meter span over 8 meter PSCC poles.

1.64 1.66

2 LT 3 phase 4 wire line with 4x55 mm2 AAAC with 50 meter span over 8 meter PSCC poles.

2.18 2.19

3 LT 4 wire line with 3x35 mm2 + 1x25mm2 AB cable with 35 meter span over 8 meter PSCC poles.

1.88 2.41

4 LT Single phase 3 wire line with 3x34 mm2 AAAC with 50 meter span over 8 meter PSCC poles.

1.32 1.41

79


The utility has standardised the transformer capacities and the number of 11 kV

outgoing feeders etc., at the 33/11 kV substations. The number of substations

installed in the past few years is limited. The substations are erected in rural area

with 1x3.15 MVA transformer initially and additional transformers added based on

load development. The transformer capacity of the substations in Urban area are

1x5 MVA or 2x3.15 MVA.

Outdoor Substations

The costs of 33/11 kV outdoor substations being installed by the utility are given in

Table-4.88 below:

Table-4.88


Sl. No. Details


2007-08 2008-09 1 33/11 kV substations with 1x3.15MVA

Transformers with 3 Nos. outgoing 11 kV feeders 63.11 65.69

2 33/11 kV substation with 1x5 MVA transformer and 3 Nos. outgoing 11 kV feeders

81.81 84.79

3 33/11 kV substations with 2x3.15 MVA transformers with 3 Nos. 11 kV outgoing feeders.

126.06 126.90

The costs with one 3.15 /5.0 MVA transformer are without 33 kV circuit breaker on 33

kV side of transformer. For the substation under item-3, a group control 33 kV CB is

provided on HV side of power transformers. The power transformers are protected on

the 11 kV side and the 11 kV feeders with individual control breakers. The

substations in the rural areas are provided with small control rooms. In urban areas,

with more than one power transformer and 33 kV breaker control is provided and

large size control room is built.

The break-up costs for 33/11 kV substations for (i) Land (ii) Civil works and building

etc., (iii) Equipment cost including structures, foundation, cabling and

(iv) contingencies, labour and establishment charges etc., are as given in Table-4.89

below:

80

Table-4.89


Sl. No. Details Break-up Costs

2007-08 2008-091 33/11 kV substations with 1x3.15MVA

transformer with 3 Nos. outgoing 11 kV feeder

i) Land 2.5 2.5

ii) Civil works 2.59 2.77iii) Equipment costs etc. including capacitor bank 43.26 45.12iv) Contingencies, labour and establishment 14.76 15.30

Total 63.11 65.692 33/11 kV substation with 1x5 MVA transformer

and 3 Nos. outgoing 11 kV feeders

i) Land 2.5 2.5


Total 81.81 84.793 33/11 kV substations with 2x3.15 MVA

transformers with 3 Nos. 11 kV outdoing feeders.

i) Land 2.5 2.5


Total 126.06 126.90 Note: (i) The utility made a provision Rs.2.5 lakhs in the cost analysis towards cost of

land which is usually one acre. This generally varies depending upon the

market value of the land in the location concerned. (ii) The equipment costs under (3) are high as the provision is for 2x3.15 MVA

transformers instead of 1x3.15 MVA with HV control breaker etc. (iii) No indoor 33/11kv S.S are being constructed by the utility.

(iii) Distribution Transformer Stations (Outdoor) The utility installs distribution transformer stations with transformer capacities of 25


transformers with CRGO core are used by the utility. Transformers with amorphous

core are proposed to be utilised by the company in future.

The costs of installation of distribution transformer stations including cost of structure,

cabling, fuse control etc. as furnished by the utility are given in Table-4.90 below:

81

Table-4.90

Costs of Distribution Transformer Stations (Rs. In lakhs/each)


2007-08 2008-09 Three Phase 11 kV/433 V Transformer stations

1 25 kVA 1.16 1.15 2 63 kVA 1.55 1.48 3 100 kVA 2.04 2.24 Single Phase 6.6 kV/230 V Transformer stations

4 15 kVA/16 kVA 0.82 0.74 The costs of 63 kVA and 16 kVA transformer stations in 2008-09 are less than

2007-08 due to lower cost of the transformers procured.

(iv) Metering Equipment and Meters The costs of metering equipment and meters being installed by the utility are given in

Table-4.91 below:

Table-4.91

Costs of Meter Equipment and Meters (Rs. )


2007-08 2008-091 33 kV CT PT HT metering 64423 644232 11 kV CT/PT set for HT metering 25272 419633 HT trivector meter 15485 133004 LT 3 Phase meter 9524 95245 LT single phase meter 960 935

The utility provides only static meters to all consumers.

(v) Service Line Costs The service line costs for various class of consumers as provided by the utility are


Table-4.92


Sl.No. Details Costs 2007-08 2008-09

1 Single Phase service for domestic / non-domestic with electronic meter

2290 2320


13,040 13,120

3 Three phase agricultural service with meter 3120 32304 Industrial service above 20 HP with LT Trivector meter 13580 137505 Street light service 2630 27306 LT Trivector meter erected on LV side of DTR,. 14790 14950


Chapter-5

82

13. Central Electricity Supply Utility of Orissa (CESU)

The distribution companies in Orissa manage 33 kV, 11 kV and LT systems under

distribution. The utility prepares cost data / cost estimates for various elements in

distribution business – 33/11 kV substations, distribution transformer stations, 33 kV,

11 kV and LT lines etc., and updates the data yearly based on input costs. The

Orissa Electricity Regulatory Commission (OERC) has approved the cost data for

different works of the distribution system in 2005-2006. Subsequently every year the

cost of various materials used for the cost data are approved by the Commission for

adoption in the cost analysis. This cost data / cost analysis is adopted for preparation

of estimates for works and award of contracts either on turnkey basis or on partial

turnkey basis.


(i) 33 kV, 11 kV and LT Lines (overhead)

The construction of lines is generally awarded on partial turnkey basis with major

materials supplied by the utility and the erection by the contractor along with supply

of minor materials. The major works including erection of 33 kV substations are

presently carried out by M/s NTPC, NHPC and PGVCL under RGGVY programme.

The distribution company is executing some works under system improvement and

other schemes.


The utility has standardised the construction of 33 kV line with 100 mm2 AAAC on 9.1

meter PSCC poles with 100 and 70 meter spans. In both rural and urban areas lines

with 70 meter span length over 9.1 meter PSCC poles is generally adopted.

The cost per km of line as obtained from the utility / validated are as below:

The costs of 33 kV lines as being constructed by the utility are given in Table- 4.93

below:

83

Table- 4.93

Costs of 33 kV lines (Overhead) (Rs. In lakhs/km)

Sl.No. Details Costs obtained / validated 2007-08 2008-09


3.20 3.71

2 33 kV line with 100 mm2 AAA conductors over 9.0 meter PSCC poles with 70 meter span

3.38 3.93

(b) 33 kV Underground System:

33 kV underground cable system is executed in the cities wherever the laying of

overhead lines is not possible. The size of the cable standardised is single core 300

mm2 XLPE cable.

The costs of underground cable system as obtained from the utility are given in

Table- 4.94 below.

Table- 4.94

Costs of Underground Cable system (Rs.in lakhs/km.

S.No Details Costs as Obtained / Validated

2007-08 2008-09 1

i) 33 kV underground cable line with single core 300 mm2 XLPE (3 circuits)

-

42.70

ii) Road restoration charges - 10.74 Total 53.24

The above work is carried out on Turnkey contract basis. The major items that

influence the cost are the rate per km. of the cable, the type of soil and the road

restoration etc.

(c)11 kV Overhead Lines The utility adopts the following norms for construction of 11 kV line:

11 kV lines are constructed with 34 mm2 and 55 mm2 AAAC on 8.0 meter supports

with 100 and 70 meter spans. Lines with 80 mm2 AAAC are also constructed

wherever required. Cost analysis is also available for lines with 9 meter long 100X

116 mm RS joists. The line with 70 meter span is most common. U.G cable works for

11 kV lines are carried in the utility in the areas where laying of overhead lines is not

possible.


below:

84

Table-4.95

Costs of 11 kV Overhead Lines (Rs. In lakhs/Km)

Sl. No. Details

Costs obtained / validated 2007-08 2008-09

1 11 kV line with 55 mm2 AAA Conductor with 100 meter span over 8 meter PSCC poles

1.72 2.09


1.86 2.22


1.54 1.61


1.72 1.81


2.18 2.74

(c) LT Overhead Lines


(i) LT 3 phase 5 wire line with 3x55 mm2 + 2x34 mm2 AAAC on 8.0 meter PSCC

poles / 7.5 meter RS Joists with 50 meter span.

(ii) LT 3 phase 5 wire line with 5x34 mm2 AAAC on 8.0 meter PSCC poles/7.5

meter RS Joists with 50 meter span.

(iii) 3 phase 4 wire line with 4X55 mm2 AAAC over 8.0 meter PSCC poles /7.5


(iv) 3 phase 4 wire line with 4x34 mm2 AAAC over 8.0 meter PSCC poles/7.5 meter

RS Joists with 50 meter span.

(v) Single phase 3 wire line with 3x34 mm2 AAAC over 8.0 meter PSCC poles/7.5


(vi) Single phase 2 wire line with 2x34 mm2 AAAC over 8.0 meter PSCC poles/7.5

meter RS Joists with 60 meter and 65 meter spans.



Urban areas for 3 phase supply (4 wires) and for street light supply (5th wire).

(ii) 3 phase 5 wire with 34 mm2 AAAC Rural areas for 3 phase supply (4 wires) and for street light supply (5th wire).






For single phase supply loads (2 wire) and street light (3rd wire). Used in urban and rural areas with single phase loads and street light connections.



85

The costs of LT overhead lines being commonly constructed by the utility are given in

Table-4.96 below:

Table-4.96

Costs of LT Overhead Lines (Rs. In lakhs/km)

Sl. No.


1 LT 3 phase 4 wire line with 3x55 mm2 + 1x34 mm2

AAAC with 50 meter span over 8 meter PSCC poles

1.98 2.45

2 LT 3 phase 4 wire line with 4x34 mm2 AAAC with 50 meter span over 8 meter PSCC poles

1.84 1.90

3 LT Single phase 3 wire line with 3x34 mm2 AAAC with 50 meter span over 8 meter PSCC poles

1.46 1.53

4 LT Single phase 2 wire line with 2x34 mm2 AAAC with 50 meter span over 8 meter PSCC poles

1.20 1.30

5 LT 4 wire line with 3x35 mm2 + 1x25 mm2 AB cable with 50 meter span over 8 meter PSCC poles

1.68 1.88

6 LT 4 wire line with 3x35 mm2 + 1x25 mm2 AB cable with 50 meter span over 125x75 mm RS Joist

2.23 2.25


The utility has standardised the transformer capacities and the number of 11 kV

outgoing feeders etc., at the 33/11 kV substations. The number of substations

constructed in the past few years is limited. The substation is constructed in rural

area with 1x3.15 MVA or 1x5 MVA transformer initially and additional transformers

added based on load development. The transformer capacity of the substations in

urban area are 2x5 MVA or 2x8 MVA.

Outdoor Substations

The costs of 33/11 kV outdoor substations being installed by the utility are given in

Table-4.97 below:

Table-4.97


Sl. No. Details


2007-08 2008-09 1 33/11 kV substations with 1x3.15 MVA Transformer

with 3 Nos. outgoing 11 kV feeders 79.53 -

2 33/11 kV substation with 1x5 MVA transformer and 3 Nos. outgoing 11 kV feeders

110.98 -

3 33/11 kV substations with 2x8 MVA transformers with 5 Nos. 11 KV outgoing feeders with indoor 11 kV control panel board

- 303.20

No land costs included in the data of 2007-08.

86

The costs with 3.15 or 5 MVA transformers are without 33 kV circuit breaker on 33 kV

side of transformers and without capacitor bank. For the substation under item-3,

individual 33 kV CBs are provided on HV side of power transformers. The power

transformers are protected on the 11 kV side and the 11 kV feeders through the

indoor 11 kV switchgear control board. Capacitor banks are not provided in the new

substations. The substations in the rural areas are provided with small control rooms.

In urban areas, with more than one power transformer and 33 kV breaker control

fairly large control room is built.

The break-up costs for 33/11 kV substation for (i) Land (ii) civil works and building

etc., (iii) Equipment cost including structures, foundations, cabling and

(iv) contingencies, labour and establishment charges etc., are given in Table-4.98

below:

Table-4.98


Sl. No. Details

Break-up Costs2007-08 2008-09

1 33/11 kV substations with 1x3.15MVA transformer with 3 Nos. outgoing 11 kV feeder

i) Land 2.00

ii) Building and other civil works 3.87 -iii) Equipment costs etc. 54.82 -iv) Contingencies, labour and establishment 18.84 -

Total 79.53 -2 33/11 kV substation with 1x5 MVA transformer and 3

Nos. outgoing 11 kV feeders

i) Land 2.00

ii) Building and other civil works 3.87 -iii) Equipment costs etc. 78.33 -iv) Contingencies, labour and establishment 26.78 -

Total 110.98 -3 33/11 kV substations with 2x8 MVA transformers

with 5 Nos. 11 kV outgoing feeders and indoor 11 kV panel board

i) Land 10.00

ii) Building and other civil works - 14.80iii) Equipment costs etc. - 214.40iv) Contingencies, labour and establishment - 64.00

Total 303.20Note: i The land for the Substation is usually one acre and the cost generally varies depending

on the market value of the land in the location concerned. ii The equipment costs under (3) are high as the provision is made for 2x8 MVA power

transformers with individual HV control breakers and 11 kV indoor switchgear panel for transformer LV and feeder control.

87

(ii) Distribution Transformer Stations (Outdoor) The utility installs distribution transformer stations with transformer capacities of 25


transformers with CRGO core are used by the utility. Transformers with amorphous

core are proposed to be utilised by the utility in future.

The costs of installation of distribution transformer stations including cost of structure,

cabling, fuse control etc. as furnished by the utility / validated are given in

Table-4.99 below:

Table-4.99

Costs of Distribution Transformer Stations (Rs. In lakhs/each)

Sl. No.


Three Phase 11 kV/433 V Transformer Stations

1 25 kVA 1.62 1.73

2 63 kVA 2.07 2.78

3 100 kVA 2.39 2.55

Single Phase 6.6 kV/433 V Transformer Station

4 15 kVA/16 kVA 0.898 0.953


The costs of metering equipment and meters being installed by the utility are given in

Table-4.100 below:

Table-4.100

Cost of Meter Equipment and Meters (Rs. )

Sl.

No.

Details Costs obtained / validated

2007-08 2008-09

1 33 kV CT PT HT metering 38455 38455

2 11 kV CT/PT set for HT metering 15288 15288

3 HT trivector meter 9000 9000

4 LT 3 Phase meter 1284 1284

5 LT single phase meter 402/826 402/826

The utility provides only static meters to all consumers.

88


The service line costs for various class of consumers as provided by the utility are

given in Table-4.101 below:

Table-4.101


Sl.No. Details Costs 2007-08 2008-09

1 Single Phase service for domestic / non-domestic with electronic meter

1990 2040


3990 4110

3 Three phase agricultural service with meter 4760 49104 Industrial service upto 20 HP 4740 48905 Industrial service above 20 HP with LT Trivector meter 6300 64506 Street light service 2500 25807 LT Trivector meter erected on LV side of DTR,. 6390 6550


Chapter-5.

89

14. Punjab State Electricity Board (PSEB)

The Punjab State Electricity Board is an integrated utility managing Generation,

Transmission and Distribution of electricity in the State. The transmission and

distribution voltages are 400 kV, 220 kV, 132 kV, 66 kV, 11 kV and LT (400 V).

When the State Electricity Board is unbundled on functional basis the 11 kV and LT

voltages are likely to come under distribution management as in the case of

Kanataka and Gujarat. In Delhi, however, the 66 kV voltage is under distribution

companies. In PSEB, 66 kV is also considered under distribution and 66 kV, 11 kV

and LT are considered as distribution voltages to benchmark costs.

The 33/11 kV lines and substations are executed upto 2005-06 only. Now the PSEB

is upgrading the 33 kV system to 66 kV system. There are no indoor stations in

PSEB. Most of the works are being executed departmentally.

The costs obtained from PSEB for various elements of distribution business are

discussed below:

(i) 66 kV, 11 kV and LT Lines (Overhead)

(a) 66 kV Lines (Overhead) The utility constructs 66 kV single circuit and double circuit lines on towers with

‘Panther’ (200 mm2) ACSR and ‘Wolf’ (150 mm2) ACSR with spans varying from 250

Mts to 300 Mts.

The costs of 66 kV single circuit (SC) and double circuit (DC) lines on single and

double circuit towers as obtained from PSEB / validated are given in Table 4.102

below:

Table-4.102

Costs of 66 kV lines (Overhead) (Rs. in lakhs/km)

Sl. No. Details


2007-08 2008-09 1 66 kV SC line on single circuit towers with 200 mm2

ACSR (“panther”) with 300 meters span 12.46 13.22

2 66 kV SC line on double circuit towers with 200 mm2 ACSR (“panther”) with 250 meters span

14.12 14.71

3 66 kV DC line on DC towers with 200 mm2 ACSR (“panther”) with 250 meters span.

19.37 20.33

4 66 kV SC line on single circuit towers with 150 mm2 ACSR (“Wolf”) with 300 meters span.

8.77 9.22

5 66 kV SC line on DC towers with 150 mm2 ACSR (“Wolf”) with 250 meters span.

13.25 13.76

6 66 kV DC line on DC towers with 150 mm2 ACSR (“Wolf”) with 250 meters span.

17.56 18.34

90

(b) 11 kV lines (overhead)

The 11 kV lines are being constructed by PSEB with different sizes of conductor i.e.

80 mm2, 50 mm2, and 30 mm2 ACSR on 8 meter and 9 meter PCC supports with

spans varying from 50 meter to 70 meter.

The costs of 11 kV overhead lines as obtained from the utility / validated are given in

Table-4.103 below:

Table-4.103

Costs of 11 kV Overhead Lines (Rs. in lakhs/km)

Sl. No. Details


2007-08 2008-09 1 11 kV line with 80mm2 (“Raccoon”) ACSR over 9

meter PCC poles with 50 meter span. 2.3 2.6

2 11 kV lines with 50 mm2 (“Rabbit”) ACSR over 9 meter PCC Poles with 60 meter span.

1.89 1.99

3 11 kV line with 30 mm2 (“Weasel”) ACSR over 9 meter PCC poles with 70 meter span

1.76 1.95

(c) LT lines (Overhead)

The utility constructs LT lines – 3 phase 5 wire, 3 Phase, 4 wire, and single phase

3 wire and single phase 2 wire lines with 50 mm2, 30 mm2 and 20 mm2 ACSR on 8

meter supports with spans varying from 50 meter to 70 meter.

The costs of LT lines (Overhead) as obtained / validated are given in Table-4.104

below:

Table-4.104

Costs of LT lines (overhead) (Rs. in lakhs/km)

Sl. No. Details


2007-08 2008-09 1 3 phase 5 wire line with 30 mm2 ACSR (weasel) over 8

meter PCC poles with 67 meter span 1.98 2.19

2 LT 3 phase 4 wire line with 30 mm2 ACSR (weasel) over 8 meter PCC poles with 55 meter span

1.53 1.71

3 3 phase 4 wire line with 3x50 mm2 + 1x20 mm2 ACSR over 8 meter PCC poles with 55 meter span

2.18 2.30

4 3 phase 4 wire line with 3x 30 mm2 + 1x20 mm2 ACSR over 8 meter PCC poles with 67 meter span

1.50 1.61

91

(ii) 66/11 kV Substations (Receiving Stations) As discussed above the 66 kV voltage system is also considered under distribution.

The utility generally constructs the substations with 1x8 MVA and 1x12.5 MVA power

transformers initially. Substations with 1x20 MVA transformers are also in operation.

The costs with break-up as below are obtained from PSEB / validated, (i) Civil works

(ii) Equipment costs including structure etc., and (iii) labour, transport, establishment

etc.

The costs as obtained from the utility / validated are given in Table-4.105 below:

Table-4.105

Costs of 66/11 kV Substations (Outdoor) (Rs. In lakhs)

Sl. No. Details


2007-08 2008-09 1 66/11 kV substation with 1x20MVA Transformer

with 8 Nos. 11 kV outgoing feeders

i) Control room, compound wall and other civil works including bore well etc.

40.58 49.93

ii) Equipment costs including structures, foundations, cabling etc.

267.92 259.78

iii) Labour, establishment, transport and other charges 33.50 32.39 Total 342.00 342.10

iv) 66 kV line bay 27.00 27.00 Total cost 369.00 369.10

2 66/11 kV substation with 1x12.5 MVA Transformer and 6 Nos. outgoing feeders

i) Civil works including control room, compound wall, bore well etc.

40.58 49.93


210.35 205.28

iii) Labour, Transport & other charges 26.29 26.37 Total 277.22 281.58 66 kV line bay 27.00 27.00 Total cost 304.22 308.58

3 66/11 kV substation with 1X 8 MVA power transformer with 5 Nos. 11 kV outgoing feeders.

i) Civil works including control room, compound wall, bore well etc.

40.58 49.93


114.61 111.49

iii) Labour, establishment, transport etc. 14.33 13.78 Total 169.52 175.20 66 kV line bay 27.00 27.00 Total cost 196.52 202.20

The costs of 66/11 kV substations do not include the cost of land, capacitor bank,

residential quarters etc.

92


The utility installs distribution transformer stations with transformer capacities of 25

kVA, 63 kVA and 100 kVA. DTR stations with transformer capacity of 200 kVA and

250 kVA are also existing.

The distribution transformers of 6.3 kVA, 10 kVA and 25 kVA are proposed under

‘OYT ’ scheme for giving connections to agricultural pump sets from 2008-09.

The costs of distribution transformer stations including of cost of structure etc., are

given in Table-4.106 below as obtained from the utility / validated.

Table-4.106

Costs of Distribution Transformer Stations (Outdoor) (Rs. in lakhs/each)

Sl. No. Details


2007-08 2008-09 Distribution Transformer stations (3 Phase) with,

1 6.3 kVA - 0.66 2 10 kVA - 0.75 3 16 kVA - 0.88 4 25 kVA 0.96 1.09 5 63 kVA 1.20 1.30 6 100 kVA 1.66 1.84

(iv) Metering Equipment, Meters etc.

The utility is extending H.T supply at 11 kV upto 2500 kVA demand and at 66 kV

above 2500 kVA demand.

The costs of metering equipment, meters etc., as being used by the utility are given

in table 4.107 below. The cost includes installation costs.

Table-4.107

Costs of Metering Equipment and Meters (in Rs)

Sl. No. Details Costs as obtained

2007-08 2008-091 66 kV CTs & PTs 338000 3600002 11 kV CT PT sets 26872 268723 Trivector meter 3803 -4 LT 3 Phase meter 3320 18005 LT Single phase meter 480 440

For 66 kV and 11 kV the cost of CTs, PTs and trivector meter has to be taken

together to arrive at total cost of metering.

93

(v) Service Lines

The costs of service connection estimates obtained from the utility for different

classes of consumers are given in Table-4.108 below:

Table –4.108

Service Line Costs

S.No Details Costs of Service (Rs.)

2007-08 2008-091 Single phase domestic & non domestic 2775 28302 Three phase domestic & non domestic 9235 94203 Three phase industrial 10380 105904 Agricultural (un metered) 6125 6250

94

15. BSES Rajadhani Power Limited (BRPL), New Delhi BSES Rajadhani Power Limited distributes power in 19 districts across South and

West area of Delhi. The distribution voltages are 66kV, 33kV, 11kV and LT (400V).

Most of system is with underground cables. The utility prepares cost estimates for

various works such as substations, distribution transformer stations, underground

cable feeders, replacement of aged equipment, augmentation works, etc based on

input costs arrived at twice a year in the months of January and June based on

moving average prices calculated.

The construction works are generally awarded on partial turnkey basis i.e. the utility

purchasing and supplying all major materials and erection by the contractor along

with supply of minor materials. The cost estimates prepared by the utility and costs

as executed have been verified and found that the completion costs are generally

within the cost estimates.

The costs as obtained from the utility for each of the elements of distribution business

are discussed below:

(i) 66kV, 33kV, 11kV and LT lines: The utility manages 66kV, 33kV, 11kV and LT network. Most of the network is

underground cable system. There are also some 11kV and LT overhead lines.

(a) 66kV line (Underground cable) The utility generally uses single core 630 mm2, XLPE 66kV cable for 66kV system.

The cost per Km of underground cable system as obtained from the utility is given in

Table 4.109 below:

Table – 4.109

Cost of 66kV UG Cable Lines (Rs. in lakhs / Km)

Sl.No. Item Costs obtained 2006-07 2007-08

1 i)

66kV UG cable line with XLPE power cable, 1CX630 mm2

85.70 84.04

ii) Road cutting and restoration charges 20.00 50.00 Total 105.70 134.04

Data for the year 2008-09 is not available.

95

(b) 33kV Line (Underground) The utility generally uses three core 400 mm2 XLPE, 33kV cable for 33kV system.

The cost per Km of underground cable system as obtained from the utility is given in

Table 4.110 below:

Table – 4.110

Cost of 33kV Underground Cable Line (Rs. in lakhs / Km)


1 i)


34.11

35.62


(b) 11kV line (Overhead)

The utility generally erects 11kV overhead line with ‘DOG’ (100 mm2 ) ACSR on 11

meter PCC supports.

The cost per Km of line as obtained from the utility is given in Table 4.111 below:

Table – 4.111

Cost of 11kV Lines (Overhead) (Rs. in lakhs / Km)


1 11kV overhead line with ‘DOG’ (100 mm2 ACSR on PCC, 11 meter supports.

5.77 6.59

(c) 11kV UG cable The utility generally uses three core 300mm2 XLPE, 11kV cable for 11kV UG cable

system.

The cost per Km of 11kV underground cable line as obtained from the utility is given

in Table 4.112 below:

Table – 4.112

Cost of 11kV UG Cable Line (Rs. in lakhs / Km)


1 i)

11kV UG cable line with 3C X 300 mm2 XLPE cable

14.88

15.38


96

(d) LT Lines (Overhead)

The utility generally erects LT overhead line with ‘DOG’ (100 mm2) ACSR on 9 meter

PCC supports.

The cost per Km of line as obtained from the utility is given in Table – 4.113 below:

Table – 4.113

Cost of LT Overhead Line (Rs. in lakhs / Km)


1 3 phase 4 wire LT overhead line with ‘DOG’ ACSR on 9 meter supports

5.60 6.34

(e) LT Underground Cable The utility generally uses 3½ core 300 mm2 XLPE cable for LT system.

The costs as furnished by the utility are given in Table – 4.114 below:

Table – 4.114

Cost of LT UG Cable Line (Rs. in lakhs / Km)


1 i)

3phase LT UG cable line with 3½C X 300 mm2 XLPE cable.

11.93

NA

ii) Road Restoration charges 3.47 Total 15.40


The utility generally constructs 66/11kV substations with 20/25 MVA power

transformers. As and when the substations with 1X20 MVA transformer are fully

loaded additional 20 MVA is being installed. 33/11 kV substations with 1x16 MVA,

2x16 MVA and 2x20 MVA are also in service.

Delhi Vidyut Board has transferred land on lease to respective distribution licencees

at the time of restructuring at the rate of Rs.1/sq. meter. Construction of substations

is being taken up in the land so transferred.

In certain cases, the distribution licencee procures land on lease basis on zonal

variant rate for taking up any new substation.

33/11 kV outdoor substations are not being executed by the utility over the last 5

years.

97

Cost of the 66/11kV and 33/11kV substations as obtained from the utility / validated


Table – 4.115

Costs of 66/11kV and 33/11kV Substations (Rs. in lakhs)

S.N Item Costs obtained /

validated 2007-08 2008-09

1 Erection of 66/11kV substation outdoor type with 2X25 MVA 66/11kV transformers and 25 Nos. 11kV feeders with capacitor bank and control room

- 1350

2 Erection of 33/11kV substation indoor type with 2Nos. 20 MVA 33/11kV transformers and 11kV switchgear panels with 5.4 MVAR 11kV capacitor bank including control room

1343.80 -

Break-up of costs for land and civil works, equipment and overheads etc., are not

available to analyse the costs.


At present, the utility generally installs distribution transformer stations with

transformer capacities of 400 KVA, 660KVA and 990 KVA.

DTR stations with 100, 500, 630 and 750 KVA capacity are also in operation.

The costs of distribution transformer stations including cost of structures etc as

obtained from the utility are given in Table 4.116 below:

Table – 4.116

Costs of Distribution Transformer Stations (Rs. in lakhs / Km)


1 990 KVA distribution transformer station 19.14 19.27

2 Augmentation of Transformers 630 to 990 KVA 9.67 -

The utility is generally augmenting the distribution transformer capacity with higher

rating transformers and utilizing the released transformers for augmentation at other

locations or for erection at new transformer stations and hence the costs do not

reflect the real costs of a new station.

98

(iv) Service Lines

The service line cum development charges being adopted by BRPL from 2007 are

given in Table 4.117 below:

Table-4.117

Service Line Costs

S.N Sanctioned load (kW) Amount (Rs.) 1 Upto 5 3000 2 More than 5 upto 10 7000 3 More than 10 upto 20 11000 4 More than 20 upto 50 16000 5 More than 50 upto 100 31000 6 More than 100kW (at 11kV) 50% of the cost of HT cables line /

OH line and switchgear

The HT supply is extended to consumers for a load of 45kw and more. The service

line and development charges are collected at fixed rates upto 100kW. For 100kW

and more, the charges are shared by the utility and the consumer.

99

16. North Delhi Power Limited (NDPL), New Delhi

NDPL distributes electricity in North & North west parts of Delhi. The distribution

voltages are 66kV, 33kV, 11kV and LT (400V). Majority of the lines are underground.

The utility prepares cost estimates for various works such as substations, distribution

transformer stations, underground cable lines, replacement of aged equipment,

augmentation works, etc based on input costs arrived at twice a year in April and

October based on moving average cost and % inflation rate.

The construction works are generally awarded on partial turnkey basis i.e. the utility

purchasing and supplying all major materials and erection by the contractor along

with supply of minor materials.

The costs as obtained from the utility for each element of distribution business are

discussed below:

(i) 66kV, 33kV, 11kV and LT lines

The utility manages 66kV, 33kV, 11kV and LT network. All the substations are

outdoor type with voltage ratings of 66/11kV & 33/11kV and no indoor substations

are existing. With most of the network is underground cable system, some 11kV and

LT overhead lines are also existing.

(a) 66kV line (Underground) The utility generally uses 66 kV single core 1000 mm2, XLPE cable for 66 kV system.

The utility has not taken up any 66kV line since 2004. However the cost per Km of

under ground cable system as obtained from the utility is given in Table 4.118 below:

Table-4.118 Cost of 66kV UG cable line

(Rs. in lakhs / Km) S.N Item Costs obtained

2006-07 2007-08 1

i) 66kV UG cable line with XLPE power cable, 1CX1000 mm2

-

174.85

ii) Road Restoration charges - 50.00 Total - 224.85

Data for the year 2008-09 is not available. (b) 33kV Line (underground)

The utility generally uses 33 kV three core 400 mm2, XLPE, cable for 33kV system.

The cost per Km of laying 33 kV UG cable line as obtained from the utility is given in

Table 4.119 below:

100

Table-4.119



1 i)


-

41.44

ii) Road Restoration charges - 20.00 Total - 61.44

(c) 11kV line (Overhead)

The utility generally erects 11kV overhead line with ‘DOG’ ACSR on 11 meter, PCC

supports.


Table-4.120

Cost of 11kV Lines (Overhead) (Rs. in lakhs / Km)


1 Erection of 11kV overhead line with ‘DOG’ ACSR on PCC, 11 meter supports.

- 5.35

(d) 11kV UG cable

The utility uses 11 kV three core 300 mm2 XLPE cable for 11kV UG cable line.

The cost per Km of laying 11 kV UG cable as obtained from the utility is given in

Table 4.121 below:

Table-4.121



1 i)

11 kV UG cable line with 3C X 300 mm2, XLPE cable

-

20.74

ii) Road Restoration charges 12.75 Total - 33.49

(e) LT lines (overhead)

The utility generally erects LT overhead line with ‘DOG’ (100 mm2) ACSR on 9 meter

PCC supports.


101

Table-4.122

Cost of LT Overhead Line (Rs. in lakhs / Km)


1 3phase 4wire LT overhead line with ‘DOG’ (100 mm2) ACSR on 9 meter supports

- 5.12

(f) LT UG Cable

The utility generally uses 3½ core 300 mm2, XLPE cable for LT system.

The costs could not be obtained from the utility for LT UG cable system.

(ii) 66/11kV substations

The utility generally constructs 66/11kV substations with 20/25 MVA transformers.

Cost of 66/11kV substation as obtained from the utility is given below in Table-4.123.

Table – 4.123

Cost of 66/11kV Substations (Rs. in lakhs / each)


1 Erection of 66/11kV substation with 2 Nos. 20/25 MVA 66/11kV transformers and 11kV switchgear panels for 10 Nos. 11kV feeders and 12kV 7.2MVAR capacitor bank

1556.89 NA

Delhi Vidyut Board has transferred land on lease to respective distribution licencees

at the time of restructuring at the rate of Rs.1/sq.m.Construction of substations is

being taken up in the land so transferred.

In certain cases, the distribution licencee procures the land on lease basis on zonal

variant rate for taking up any new substation.

The break-up of costs (i) land and civil works (ii) equipment and material and (iii)

transport, erection, overheads etc., are not available to analyse the costs.


The utility generally installs distribution transformer stations with transformer

capacities of 63 kVA, 160 kVA, 315 kVA, 400 KVA, 630 KVA and 990 kVA.

The costs of distribution transformer stations including cost of structures etc as

obtained from the utility are given in Table 4.124 below. Most of the DTRs are pole

mounted.

102

Table – 4.124

Costs of distribution transformer stations (Rs. in lakhs / each)


1 990 KVA distribution transformer station - 13.87 2 315 KVA distribution transformer station - 7.94


Metering equipment includes 11 kV CT, PT set, trivector meters, LT three phase and

single phase meters. The costs are given in Table 4.125 below.

Table – 4.125

Costs of metering sets and meters (in Rs)

S.N Item Costs obtained 2005-06 2006-07 2007-08

1 11kV CT PT set (60/5) 21000 25000 - 2 LT 3 phase meter 4500 - 3600 3 LT single phase meter 1200 1100 1100

(v) Service Lines

The service line cum development charges being adopted by NDPL from 2007 are

given in Table 4.126 below:

Table – 4.126

Service line costs

S.N Sanctioned load (kW) Amount (Rs.) 1 Upto 5 3000 2 More than 5 upto 10 7000 3 More than 10 upto 20 11000 4 More than 20 upto 50 16000 5 More than 50 upto 100 31000 6 More than 100kW (at 11kV) 50% of the cost of HT cable line /

OH line and switchgear

103

17. Chhattisgarh State Power Distribution Company Limited

Chhattisgarh is not one of the States identified for the study. Chhattisgarh State

Electricity Regulatory Commission has obtained the data from CSPDCL and

furnished. The data / information obtained is considered for the study.

Chhattisgarh State Electricity Board which was an integrated utility managing

generation, transmission and distribution of electricity in the State has been

restructured on functional basis w.e.f. 31/12/2008 and the distribution business in the

state is being managed by the Chhattisgarh state power distribution company limited.

The utility manages 33kV, 11kV and LT network.

The utility prepares cost data / cost estimates every year based on the procurement

cost of materials for various works such as 33/11kV substations, distribution

transformer stations, overhead lines etc.

The utility procures all the materials and gets the works executed through labour

contracts.

The costs are obtained from the utility for each element of distribution business from

2003-04 to 2007-08. The costs furnished are discussed below:

(i) 33kV, 11kV and LT lines

(a) 33kV Lines

The utility has standardized the construction of 33kV overhead lines with ‘Raccoon’

(80mm²) ACSR / AAAC on 9.1 meter PCC poles / 9.0 meter Rail poles with 100 and

125 meter spans and also constructs few lines with Dog (100mm2) ACSR.

The costs per Km of line obtained are given in Table 4.127 below:

104

Table 4.127

Costs of 33kV Lines (Rs. in lakhs / Km)


1 With 80mm² ACSR on 9.1 meter PCC poles (span 125 meter) 2.33 2.65 2 With 80mm² ACSR on 9 meter Rail poles (span 125 meter) 3.67 4.05 3 With 80mm² ACSR on 9 meter ‘H’ beams (152X152mm)

(span 125 meter) 3.31 3.64

4 With 100mm² ACSR on 9.1 meter PCC poles (span 100 meter)

2.98 3.43

5 With 100mm² ACSR on 9 meter Rail poles (span 100 meter) 4.66 5.18

(b) 11kV Lines

The utility has standardized the construction of 11kV overhead lines with ‘Rabbit’

(50/55mm²) ACSR / AAC and ‘Weasel’ (30/34mm²) ACSR/AAC on 8.0 meter PCC

poles with 100/125 meter spans.

Few lines are constructed over Rail poles, ‘H’ beams & R S joists.

The costs per Km of line obtained are given in Table 4. 128 below:

Table-4.128 Costs of 11kV Lines


2006-07 2007-08 1 With 50mm² ACSR on 8.0 meter PCC poles (span 100 meter) 1.55 1.85 2 With 30mm² ACSR on 8.0 meter PCC poles (span 125 meter) 1.18 1.37 3 With 50mm² ACSR on 9.0 meter Rail poles (span 100 meter) - 3.69 4 With 50mm² ACSR on 9.0 meter ‘H’ Beams (152X152mm)

(span 100 meter) - 3.17

5 With 50mm² ACSR on 9.0 meter R S Joists (135X85mm) (span 100 meter)

- 2.64

5 With 30mm² ACSR on 9.0 meter R S Joists (135X85mm) (span 100 meter)

- 2.16

(c) LT Lines The utility has standardized the construction of LT lines - 3 phase 5 wire, 3 phase 4

wire and 1 phase 3 wire with 30mm² or 50mm² ACSR for phases and 20mm² ACSR

for neutral on 8.0 meter PCC poles with 60 meter span. In urban areas 9.3 meter RS

Joists are also used as supports.

The costs per KM of line as obtained are given in Table 4.129 below:

105

Table – 4.129 Costs of LT Lines


2006-07 2007-08 1 3 Phase 5 wire line on 8.0 meter PCC poles (span 60 meter)

with ACSR of following sizes

(a) 4X50mm² + 1X20mm² 2.17 2.56 (b) 3X50mm² + 2X20mm² 1.98 2.32 (c) 4X30mm² + 1X20mm² 1.67 1.92 (d) 3X30mm² + 2X20mm² 1.61 1.84 (e) 5X20mm² 1.42 1.612 3 Phase 4 wire line on 8.0 meter PCC poles (span 60 meter)


(a) 3X50mm² + 1X20mm² 1.82 2.13 (b) 3X30mm² + 1X20mm² 1.44 1.65 (c) 4X20mm² 1.25 1.42 3 1 Phase 3 wire line on 8.0 meter PCC poles (span 60 meter)


(a) 1X50mm² + 1X30mm² + 1X20mm² 1.33 1.54 (b) 2X30mm² + 1X20mm² 1.20 1.38 (c) 3X20mm² 1.08 1.23 4 (a) 3 Phase 5 wire line on 9.3 meter RS Joists (125X70mm)

(span 45 meter) in urban areas with 3X50mm² + 2X30mm² ACSR

3.25 3.58

(b) 3 Phase 5 wire line on 9.3 meter RS Joists (175X85mm) (span 65 meter) in urban areas with 3X80mm² + 2X30mm²

3.61 4.03

5 1 Phase 3 wire line on 9.3 meter RS Joists (125X70mm) (span 45 meter) in urban areas with ACSR of following sizes

(a) 1X50mm² + 1X30mm² + 1X20mm² 2.37 3.06 (b) 2X30mm² + 1X20mm² 2.25 2.90 (c) 3X20mm² 2.12 2.75

(ii) 33/11kV substations

The utility has standardized the construction of 33/11kV substations with single

transformer with provision to install 2nd power transformer with the following

transformer capacities and 11kV outgoing feeders.

(a) with 1X1.6 MVA power transformer and 2 Nos. 11kV outgoing feeders and 600

KVAR capacitor bank.

(b) with 1X3.15 MVA power transformer and 2 Nos. 11kV outgoing feeders and 1200


(c) with 1X5.0 MVA power transformer and 3 Nos. 11kV outgoing feeders and 1200


The substation casts obtained from the utility are given in Table 4.130 below:

106

Table – 4.130 Costs of 33/11kV Substations

(Rs. in lakhs)


1 33/11kV SS with 1X1.6 MVA power transformer and 2 Nos. 11kV outgoing feeders and 600 KVAR capacitor bank.

33.20 54.52

2 33/11kV SS with 1X3.15 MVA power transformer and 2 Nos. 11kV outgoing feeders and 1200 KVAR capacitor bank.

50.43 81.90

3 33/11kV SS with 1X5.0 MVA power transformer and 3 Nos. 11kV outgoing feeders and 1200 KVAR capacitor bank

64.82 95.41

The break-up of above costs of 33/11kv SS i.e land and civil works, equipment and

materials, labour charges and overheads are given in Table 4.131 below:

Table-4. 131 Costs break-up of 33/11kV Substations

(Rs. in lakhs)

S.N Item Cost during 2007-08 1X1.6 MVA 1X3.15 MVA 1X5.0 MVA

1 Civil works including control room

12.09 12.09 12.09

2 Equipment and materials 36.69 61.01 74.01 3 Labour charges for erection and

commissioning, contingencies, establishment charges, etc.

5.74 8.80 9.31

Total 54.52 81.90 95.41 The above costs do not include the cost of land


The utility installs three phase distribution transformers of capacities 25 kVA, 63 kVA,

100 kVA, 200 kVA, 315kVA and 500 kVA. The utility procures mainly conventional

type transformers. During 2007-08, the utility purchased amorphous core

transformers of capacities 100 kVA and 200 kVA also. The utility has standardized

cost estimates for erection of 25 KVA, 63 KVA, 100 KVA and 200 KVA distribution

transformers. The cost of distribution transformer stations with different capacity

transformers including structure etc are given in Table 4.132 below.

Table 4.132 Costs of Distribution Transformer Stations

(Rs. in lakhs)


1 25 KVA distribution transformer stations 0.82 1.16 2 63 KVA distribution transformer stations 1.16 1.65 3 100 KVA distribution transformer stations 1.65 2.31 4 200 KVA distribution transformer stations 2.28 3.49

107

(iv) Metering equipment The costs of metering sets and meters as installed for different categories of

consumers as obtained from the utility are given in Table 4.133 below:

Table 4.133 Costs of Meters and Metering Equipment

(in Rs)


1 (a) Single phase energy meters, high precision, 5 to 20 Amps

1030 1030

(b) Single phase static meters 5-30Amps 756 1000 2 Poly phase static energy meters

(a) 10-40 Amps 2494 2900 (b) 20-100 Amps with data storage 6182 6185 (c) CT operated, 100/5 Amps with data storage 5900 5900 (d) High precision meter, 10-40Amps 4400 4400

3 HT static trivector meter 7222 7225 Box for HT meter 1908 2500

108

18. Maharashtra State

Though Maharashtra is not one of the identified States for the study, the Maharashtra

Electricity Regulatory Commission collected some information regarding costs of

substations, lines and distribution transformer stations from Maharashtra State

Electricity Distribution Company Limited, Tata Power Company Ltd and BEST ltd.

and forwarded to the consultant. The data / information furnished is not complete and

it is based on cost estimates for 2009-10. However the data furnished is discussed

below:

A. MAHARASHTRA STATE ELECTRICITY DISTRIBUTION COMPANY LTD

The utility furnished item wise cost data / cost estimate for 2009-10 for the following

works.

(i) 33kV, 11kV and LT overhead lines

(a) 33kV lines The utility generally uses 100mm² ACSR on 9.0M PSC poles for construction of 33kv

lines. The estimated cost per Km of line furnished by the utility separately for rural,

urban and hilly areas are given in Table 4.134 below.

Table 4.134

Costs of 33kV Lines (Rs. in lakhs / Km)

S.N Item Cost during 2009-10 Rural Urban Hilly

1 33kV line with 100mm2 ACSR on 9.0 meter PSC poles

4.80 4.94 5.15

(b) 11kV lines

The utility generally uses 55mm2 AAAC on 9.0 meter PSC poles and 100mm2 ACSR

on 11.0 meter RS Joists for construction of 11kV lines.

The estimated costs per Km of line furnished by the utility are given in Table 4.135

below.

Table – 4.135 Costs of 11kV Lines

(Rs. in lakhs / Km) S.N Item Cost during 2009-10

Rural Urban Hilly 1 11kV line (pin type) with 55mm2 AAAC on 9.0 meter PSC

poles 3.17 3.26 3.40

2 11kV lines (suspension type) with 100mm2 ACSR on 11.0 meter RS Joists of size 100X116mm

6.97 7.17 7.47

109

(c) LT lines The utility generally erects LT lines 3phase 4 wire on 8.0 meter PSC poles and

3phase 5 wire 9.0 meter R S Joists using 50mm2 AAAC for phases and 25mm2

AAAC for neutral with 50 meter span.

The estimated costs per Km of line furnished by the utility are given in Table 4.136

below:

Table – 4.136 Costs of LT Lines

(Rs. in lakhs / Km) S.N Item Cost during 2009-10

Rural Urban Hilly 1 3 Phase 4 wire line with 50mm2 AAAC for phases

and 25mm2 AAAC for neutral on 8 meter PSC poles (span 50 meter)

1.98 2.03 2.12

2 3 Phase 5wire line with 50mm2 AAAC for phases and 25mm2 AAAC for neutral on 9 meter R S Joists (span 50 meter)

3.04 3.12 3.25

(ii) 33 and 11kV underground cable systems

(a) 33kV UG cable lines

The utility generally uses 33kV, 3C/300mm2 XLPE cable for 33kV underground

system. The estimated cost per Km of laying 33kV UG cable furnished by the utility is

given in Table 4.137 below.

Table 4.137 Cost of laying 33kV UG cable lines

(Rs. in lakh / Km) S.N Item Cost during 2009-10

Rural Urban Hilly 1 33kV, 3 core, 300mm2 XLPE underground cable

system 30.33 31.20 32.49

(b) 11kV UG cable The utility generally uses 11kV. 3 core /300mm2 XLPE cable for 11kV underground

system.

The estimated cost per Km of laying 11kV UG cable furnished by the utility is given in

Table 4.138 below:

110

Table 4. 138 Cost of laying 11kV UG cable line

(Rs. in lakh / Km) S.N Item Cost during 2009-10

Rural Urban Hilly 1 11kV, 3 core, 300mm2 XLPE underground

cable system 19.30 19.85 20.67

(iii) 33/11kV substations

The utility generally erects 33/11kV substations with the following power transformer

capacities and 11kV outgoing feeders.

(a) 33/11kV substation with 1X5.0 MVA transformer and 3Nos. 11kV outgoing

feeders (outdoor type).

(b) 33/11kV substation with 1X10.0 MVA transformer and 4Nos. 11kV outgoing

feeders (33kV side is outdoor and 11kV side is indoor type).

The estimated costs for construction of 33/11kV substations furnished by the utility


Table 4. 139 Costs of 33/11kV Substations

(Rs. in lakhs / each SS)


1 33/11kV substation with 1X5.0 MVA transformer and with 11kV switchgear (outdoor type) comprising 1 incoming and 3 outgoing

138.81 141.55 145.65

2 33/11kV substation with 1X10.0 MVA transformer and with 11kV switchgear (indoor type) comprising 1 incoming, 1 bus coupler and 4 outgoing

186.23 190.32 196.45

(iv) Distribution transformer stations

The utility installs of 3Phase distribution transformers of capacities 63KVA, 100 KVA,

200 KVA, 315 KVA and 630 KVA of both 22kV / 0.4kV and 11kV / 0.4kV voltages and

1phase 11kV / 0.25kV distribution transformers of capacities 15 KVA and 25 KVA at

distribution transformer stations.

The utility has furnished the cost of erection of distribution transformer stations with

200 KVA, 11kV / 0.4kV transformer which is given below in Table 4.140.

111

Table-4.140 Cost of distribution transformer stations

(Rs. in lakhs / each)


1 Erection of 11kV / 0.4kV, 200KVA distribution transformer centre on 9 meter RS Joists of size 100X116mm with MCCB distribution box.

5.27 5.42 5.65

(v) Metering equipment

The costs of meters as installed for different categories of consumers as obtained

from the utility are given in Table 4.141 below:

Table 4. 141 Costs of Meters and Metering Equipment

(in Rs)

S.N Item Costs obtained 2007-08

1 LT single phase meters 5-30 AMPS 798 2 HT three phase meters 2499 3 HT trivector meter 4002

B. TATA POWER COMPANY LIMITED

The utility has furnished the costs of the following works as executed for one year i.e

2007-08

(i) 33/11kV Substation

Table 4. 142 Cost of 33/11kV Substation

(Rs. in lakhs) S.N Item Costs

obtained 1 33/11kV substation with 2 Nos. 20 MVA power

transformers and 17 Nos. 11kV feeders (Outdoor type) 144.00

Cost of many items such as 11kV PTs, 33kv and 11kV lightning arrestors, 33kV and

11kV isolating switches are not included. Further the cost of 20 MVA power

transformers is taken as Rs. 20 lakhs which is the procurement cost during 2004-05.

hence, the cost cannot be considered as executed cost of 33/11kV substation with 2

Nos. 20 MVA transformers.

112

(ii) 33kV Underground Cable System Table 4. 143

Cost of 33kV UG cable System (Rs. in lakhs / Km)

S.N Name of work Cost obtained 1 Laying of 33kV, 3core, 400mm2 UG cable, testing

and commissioning including road restoration charges payable to the Authorities

64.40

(iii) 11kV underground cable system Table 4. 144

Cost of 11kV UG Cable System (Rs. in lakhs / Km)

S.N Name of work Cost obtained 1 Laying of 11kV, 3core, 300mm2 UG cable, testing

and commissioning including road restoration charges payable to the Authorities

48.89

(iv) Distribution transformer stations

Table 4. 145 Cost of Distribution Transformer Station

(Rs. in lakhs) S.N Name of work Cost obtained 1 11/0.4 kV 1250 KVA distribution transformer on

double pole structure 56.20

(v) Meters and metering equipment Table 4. 146

Costs of Metering Equipment and Meters (Rs. in lakhs)

S.N Item Costs obtained 1 22kV CT, PT unit 1.55 2 11kV CT, PT unit 0.99 3 HT trivector meter 0.15 4 LT trivector meter 0.07 5 LT three phase meter 0.05 6 LT single phase meter -

C. BEST Limited The utility erects indoor type 33/11kV substations, 33kV & 11kV lines with

underground cables and erects both indoor and outdoor type distribution transformer

stations.

The costs as executed are furnished for the year 2007-08 for the following works:

113

(i) 33/11kV Substations Table 4. 147

Cost of 33/11kV Substation (Rs. in lakhs)

S.N Item Cost obtained 1 33/11kV substation (indoor type) with 2 Nos. 16 MVA

power transformers and 12 Nos. 11kV feeders including 2X5 MVAR capacitor bank

831.50

(ii) 33kV Underground Cable System

Table 4. 148 Costs of 33kV UG cable system

(Rs. in lakhs / Km) S.N Name of work Cost obtained

1 Laying of 33kV, 3core, 185mm2 XLPE copper cable, including road restoration charges payable to the Authorities

115.47

(iii) 11kV Underground Cable System Table 4. 149

Costs of 11kV UG cable system (Rs. in lakhs / Km)

S.N Name of work Cost obtained 1 Laying of 11kV, 240mm2 XLPE cable, including road

cutting and restoration charges payable to the Authorities

51.80

(iv) Distribution Transformer Stations Table 4. 150

Costs of Distribution Transformer Stations (Rs. in lakhs)

S.N Name of work Costs obtained 1 11/0.4kV, 2 Nos. 630 KVA distribution transformers

station (outdoor type) 28.53

2 11/0.4kV, 2 Nos. 630 KVA distribution transformers station (indoor type)

36.35

114

5. Cost Analysis and Cost Benchmarks 5.1 The data collected from various utilities for benchmarking costs of various elements

in the Distribution Business is discussed in Chapter-4. The costs collected are

analysed and Benchmark costs arrived at in this chapter.

5.2 Cost Analysis

As discussed in Chapter-4, different utilities have adopted different practices in the

construction of 33 kV, 11 kV and LT overhead lines, 33/11 kV substations and

distribution transformer stations. The costs differ based on the practices followed.

For instance, 33 kV, 11 kV and LT lines are constructed with different sizes of

conductors, types of supports, span lengths etc., which have impact on costs.

Similarly the case with 33 kV/11 kV substations (layouts of substation, transformer

capacities) and distribution transformer stations. As explained in Chapter-4, the costs

obtained from different utilities (validated where required) are compared and a range

of cost benchmarks arrived at. These benchmark costs for elements in Distribution

Business are discussed below:

The costs include cost of material, transport, erection, supervision and other charges.

Since these are all small gestation projects, being completed within 12 to 18 months,

the interest during construction is not added to the project cost. The interest during

construction is taken overall on all works by the utility.

Taxes, duties etc., are included in the cost of equipment and material and hence they

are not considered separately.

5.3 Benchmarking Costs 5.3.1 33kV, 11kV and LT Lines

As discussed in chapter-4 the costs for the year 2007-08 and 2008-09 are

considered for benchmarking costs of various elements in distribution business.

As mentioned above different utilities adopt different norms in construction of 33

kV,11 kV and LT lines. Some utilities use All Aluminium Alloy Conductor (AAAC), of

115

different sizes; some use Aluminium Conductor Steel Reinforced (ACSR). The lines

are erected over different types of supports - PSCC, RCC, RS Joists, rail poles, steel

tubular poles etc., and adopt different spans in urban and rural areas. There are no

separate design / norms for urban and rural areas. Normally longer span is adopted

in rural area and shorter span for urban area with same supports and conductor. As

such no separate costs could be benchmarked for urban and rural areas and most of

the States do not have separate cost data for urban and rural areas. Some utilities

use RS Joists and rail poles in urban areas for 33 kV and 11 kV lines. The costs of lines – 33 kV, 11 kV and LT differ from utility to utility with the size of

conductors, type of supports used and spans adopted. The lines being constructed

are categorised into a number of groups based on conductor size, type of supports

and range of spans and a range of costs arrived at for benchmarking.

The costs for 2008-09 for some utilities in the states like West Bengal and Assam are

based on the turnkey contracts executed / under execution and they are state

specific.

The 33 kV, 11 kV and LT lines as being constructed by various utilities discussed in

Chapter-4 are summarised in Tables-5.1, 5.3 and 5.5 and comparative costs of

various utilities are given in Tables 5.2, 5.4 and 5.6. The benchmark costs are

arrived at for each voltage line.

(a) 33 kV Overhead Lines

The distribution utilities in Gujarat – UGVCL and MGVCL and Punjab State Electricity

Board do not have 33 kV system. The utilities draw power at 11 kV from 66/11 kV

substations.

The utilities construct the lines either with 100 mm2 / 80 mm2 All Aluminium Alloy

Conductor (AAAC) or Aluminium Conductor with Steel Reinforced (ACSR), mostly

over PSCC and RCC supports and in few cases over RS Joists and rail poles mostly

in urban areas with a normal span of 80 to 100 meters. The Uttarkhand Power

Corporation constructs the lines with the steel tubular poles with shorter span of 50

meters being hilly area. They also run continuous 7/16 SWG steel wire as ground

wire on the line. The costs differ from utility to utility based on the conductor size,

supports used, span lengths adopted and construction costs. The costs of lines are

categorised based on conductor size and type of supports used with a range of

spans to arrive at a range of costs and benchmark costs across the utilities. The cost

of line in UPCL is substantially high due to use of steel tubular poles with shorter

116

spans and also running continuous steel wire (ground wire) on the lines and transport

and construction practices. Hence the costs of the lines in UPCL are not taken to

benchmark the cost and this is given separately as state specific cost.

The types of 33 kV lines constructed by the utilities and the comparative costs are

given in Tables 5.1 and 5.2 below. The benchmark costs are arrived at from the

comparative costs in Table 5.2.

Table-5.1 33 kV Line with Different sizes of Conductors, Type of Supports and Span lengths

Sl. No.

Utility Conductor Supports Span lengths (Meters)

Ground wire

1 APSPDCL, Andhra Pradesh

1 100mm² AAAC 9.1 meter PSCC 105

2 100mm² AAAC 9.1 meter PSCC 80 2 APCPDCL,

Andhra Pradesh 1 100mm² AAAC 9.1 meter PSCC 105 2 100mm² AAAC 9.1 meter PSCC 80 3 100mm² AAAC 9.1 meter PSCC 65

3 TNEB, Tamil Nadu

1 100mm² ACSR 9.1 meter RCC 90

4 UGVCL, Gujarat 1 33kV lines not constructed 5 MGVCL, Gujarat 1 33kV lines not constructed 6 MPPKVVCL,

Madhya Pradesh 1 2

80mm² ACSR 100 mm2 ACSR

9.1 meter PSCC 9.1 meter PSCC

100 100

7 MPMKVVCL, Madhya Pradesh

1 80mm² ACSR 9.1 meter PSCC 100 2 100mm² ACSR 9.1 meter PSCC 100

8 UPCL, Uttarkhand 1 100mm² ACSR 9 meter ST poles 50 7/16 SWG Steel wire

2 100mm² ACSR 11 meter S.T Poles

58 7/16 SWG Steel wire

9 WBSEDCL, West Bengal

1 100mm² ACSR 9 meter PCC 100 2 100mm² ACSR 12.8 Rail 100 3 100mm² AAAC 9 meter PCC 100

10 CAEDCL, Assam 1 80mm² AAAC 9.75 meter PSC 100 2 3

150mm² AAAC 80 mm2 AAAC

9.75 meter PSC (Double pole) 10 meter ST poles

50

50

11 UAEDCL, Assam 1 80mm² AAAC 9.75 meter PSC 100 2 3

150mm² AAAC 80mm2 AAAC

9.75 meter PSC (Double pole) 10 meter ST poles

50

50

12 CESU Orissa 1 100mm² AAAC 9 meter PSC 100 2 100mm² AAAC 9 meter PSC 70

13 SOUTHCO, Orissa 1 100mm² AAAC 9 meter PSC 100 2 100mm² AAAC 9 meter PSC 65

14 PSEB, Punjab 1 33 kV lines not constructed 15 NDPL, Delhi 1 33 kV OH lines not constructed 16 BRPL, Delhi 1 33 kV OH lines not constructed 17. CSPDCL,

Chhattisgarh 1 100mm² AAAC 9.1 meter PCC 100

2 100mm² ACSR 9 meter Rail poles 100 3 80mm² ACSR 9.1 meter PCC 125 4 80mm² ACSR 9.1 meter Rail poles 125 5 80mm² ACSR 9 meter H Beams 125

A standard cost estimate for 1KM of 33kV line with 100SQ MM AAA conductor over 9.1 meters PSCC poles at 65 meters span, 75 kg. per square meter wind pressure is given in Annexure-5.1.

117

Table-5.2

Comparative costs of 33 kV over head line with different conductor sizes, supports and span lengths (Cost Rs. in lakhs / km)

Sl.No. Utility Cost of 33 kV lines

80/100 mm2 AAAC on PSCC poles 65 to

105 meter span

80/100mm2 ACSR RCC/ PSCC poles 90

to 100 meter span

80 mm2 ACSR on Rails 100-125 meter

span

100 mm2 ACSR on ST poles 60 meter span

with Ground wire

80 mm2 AAAC on PSCC poles 100

meter span

150 mm2 AAAC on PSCC poles DPs 50

meter span

80 mm2 AAAC on ST pole DPs 100 meter span

(1) (2) (3) (4) (5) (6) (7) (8) (9) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 1 APSPDCL,

Andhra Pradesh 3.49 to 3.59

3.16 to 3.29

2 APCPDCL, Andhra Pradesh

2.99 to 3.28

3.45 to 3.54

3 TNEB, Tamil Nadu 3.04 3.54 4 UGVCL, Gujarat 5 MGVCL, Gujarat 6 MPPKVVCL,

Madhya Pradesh 2.79 to

2.94 2.76 to 3.06


3.05 to 3.38

3.38 to 3.79

8 UPCL, Uttarkhand 7.69 to 10.15

8.74 to 12.95


3.1 3.42 3.89 3.83 to 4.38 *

5.20 5.72

10 CAEDCL, Assam 5.42 6.42 10.30 to 11.38 *

9.31 10.94

11 UAEDCL, Assam 5.42 6.42 10.30 to 11.38 *

9.31 10.94

12 CESU, Orissa 3.20 to 3.38

3.71 to 3.93

13 SOUTHCO, Orissa 2.70 to 3.07

2.74 to 3.22

14 PSEB, Punjab - - 15 NDPL, Delhi - - 16 BRPL, Delhi - - 17 CSPDCL, Chhattisgarh 3.43 - 4.5 to

5.18 -

Cost Range 2.70 to 3.59

2.75 to 3.89

2.79 to 3.89

2.76 to 3.80

4.0 to 5.20

5.72

Benchmark costs for 33 kV line with 80/100 mm2 AAAC / ACSR over PSCC/RCC supports (2008-09)

Rs. 3.00 to 3.60 lakhs/km. Benchmark costs for 33 kV line with 80/100 mm2 AAAC / ACSR over Rail poles (2008-09)

Rs.5.20 to 5.75 lakhs / km.

The 33 kV lines in Assam and UPCL are on the higher side in view of use of higher size conductor, steel tubular poles, short spans adopted, difficult terrain etc. The costs are as under. Separate Benchmarking is recommended for them. Assam: 1. 80mm2 AAAC on PSCC poles with 100M span & 80mm2 AAAC on steel tubular DPs, 100meter span = Rs.9.00 to Rs.11.00 lakh 2. 80mm2 AAAC on PSCC poles with 100M span =. Rs.5.50 to Rs.6.40 lakh UPCL: 100mm2 ACSR on steel tubular poles 60Meters span with ground wire = Rs.9.00 to Rs.12.00 lakh.

118

It is seen from Table-5.2 the benchmark cost for 33 kV line with AAAC and ACSR

over PSCC or RCC poles would be Rs.3.00to Rs.3.60 lakh / km and those

constructed over RS Joists and rail poles would be Rs.5.20 to Rs.5.75 lakh except in

the case of Uttarkhand Power Corporation and the utilities in Assam where the costs

would be Rs.7.00 to 13.00 lakhs / km.

(b) 33 kV Underground System

Five utilities –(i) Central Power Distribution Company of Andhra Pradesh Limited (ii)

Tamil Nadu Electricity Board (iii) Central Electricity Company of Orissa Limited and

two Utilities in Delhi are using underground cable system.

The cost of 33 kV underground system includes the cost of cable, road cutting, laying

of cable and road restoration charges. The road restoration charges are substantial

and the charges have to be paid as levied by the respective Municipal Corporations

and the distribution licensee has no control. The cost of cable and the road

restoration charges are given in Table 5.1(a) below: The costs include cost of all

accessories, laying etc.

Table-5.1 (a)

Costs of 33 kV Underground System

Sl. No. Name of the Utility

UG cable with 3x400 mm2 XLPE


UG cable with 1x300 mm2 XLPE (3

circuits) 07-08 08-09 07-08 08-09 07-08 08-09

1 APCPECL (i) Cost of cable, accessories laying, etc.

24.17

(ii) Road restoration charges 10.98 35.15

2 T TNEB (i) Cost of cable,

accessories laying etc. 22.65 22.65

(ii) Road restoration charges 30.64 30.64 Total 53.29 53.29

3 CESU, Orissa (i) Cost of cable,

accessories laying etc. 42.70

(ii) Road restoration charges 10.74 Total 53.44

4 NDPL, Delhi (i) Cost of cable,


(ii) Road restoration charges etc.

20.00

Total 61.44

5 BRPL, Delhi (i) Cost of cable,

accessories laying etc. 34.11 35.62


119

Since there is substantial difference in road restoration charges being levied by the

Municipal Corporation from city to city on which utility has no control, it is considered

appropriate to benchmark the cost of cable, cable laying including all accessories

excluding road restoration charges.

The benchmark costs for underground cable for 2008-09 for 3x400 mm2 XLPE

underground cable with all accessories and laying would be Rs.25 to 30 lakhs per

Km. in Andhra Pradesh (Hyderabad city) and Rs.35 to 42 lakhs in Delhi. The

benchmark costs for 1x630 mm2 (3 circuits) x LPE under ground cable with all

accessories and laying could be Rs.25 to 30 lakh per Km. in Tamil Nadu.

The benchmark costs for 1x 300 mm2 UG cable (3 circuits) with all accessories and

laying could be Rs. 40 to 43 lakhs per Km. in CESCO, Orissa under the turn key

contract.

(c) 11 kV Overhead Lines:

As in the case of 33 kV lines the utilities construct 11 kV lines with 50/55 mm2 and

30/34 mm2 AAAC and ACSR mostly over PSCC and RCC supports with a span of 50

to 70 meters and in some cases with 80 to 100 meter spans. UPCL however, uses

steel tubular poles with 80 meter span and also run a continuous steel wire on the

lines as ground wire. The costs differ utility to utility based on the size of the

conductor and type of supports used and also the construction practices followed.

As in the case of 33 kV lines, the 11 kV lines are categorised (grouped) based on the

size of conductor and supports with a range of spans to arrive at a range of costs and

benchmark costs across the utilities except UPCL. The costs of lines in UPCL are

high in view of use of the steel tubular poles, running of continuous ground wire and

the high transport and construction costs due to hilly terrain, hence the costs of

UPCL are to be treated separately as state specific. The types of 11 kV lines

constructed by the utilities and comparative costs are given in Tables 5.3 and 5.4

below. The benchmark costs are arrived at from the range of comparative costs in

Table 5.4.

120

Table-5.3 11 kV Line with Different sizes of Conductors, Type of Supports and

Span lengths Sl. No.

Utility Conductor Supports Span lengths

(M)

Others


1 55mm² AAAC 8 meter PSCC 65 2 55mm² AAAC 8 meter PSCC 60 3 34mm² AAAC 8 meter PSCC 65 4 34mm² AAAC 8 meter PSCC 60


1 55mm² AAAC 8 meter PSCC 60 2 55mm² AAAC 9.1 meter PSCC 60 3 34mm² AAAC 8 meter PSCC 60 4 34mm² AAAC 9.1 meter PSCC 60 5 55mm² AAAC 11M RS Joists 50

3 TNEB, Tamil Nadu 1 7/4.09mm² ACSR 9.14 meter RCC 105 2 7/3.35mm 8 meter RCC 85 3 7/3.35mm ACSR 7.5 meter RCC 67 4 7/2.59 ACSR 8 meter RCC 60 5 7.3.35ACSR 8 meter RCC 75

4 UGVCL, Gujarat 1 55mm² AAAC 8 meter PSCC 50 2 34mm² AAAC 8 meter PSCC 50 3 55mm² AAAC 8 meter PSCC 50 4 34mm² AAAC 8 meter PSCC 50 5 100mm² ACSR RSJS 33

5 MGVCL, Gujarat 1 55mm² AAAC 8 meter PSCC 50 2 34mm² AAAC 8 meter PSCC 50

6 MPPKVVCL, Madhya Pradesh

1 50mm² ACSR 8 meter PCC 100


1 50mm² ACSR 8 meter PCC 100

8 UPCL, Uttarkhand 1 50mm² ACSR ST Poles 50 7/16 SWG Steel wire

2 50mm² ACSR ST Poles 80 7/16 SWG Steel wire


1 50mm² / ACSR/AAAC 8 meter PCC 75 2 30mm² / ACSR/AAAC 8 meter PCC 100 3 50mm² ACSR ST Pole 75 4 30mm² ACSR ST Pole 75

10 CAEDCL, Assam 1 Weasel (34mm²) AAAC

8.5 meter PSC 100

2 Weasel (34mm²) AAAC

8.5 meter RSJS 100


8.5 meter ST Pole 100

4 Raccoon (80mm² AAAC)

9.75 meter PSC pole

50

11 UAEDCL, Assam 1 Weasel (34mm²) AAAC

8.5 meter PSC 100


8.5 meter RSJS 100


8.5 meter ST Pole 100

4 Raccoon (80mm² ) AAAC

9.75 meter PSC pole

50

12 CESU, Orissa 1 80mm² AAAC 8 meter PSC 70 2 55mm² AAAC 8 meter PSC 70 to 100 3 34mm² AAAC 8 meter PSC 70 to 100

121

13 SOUTHCO, Orissa 1 55mm² AAAC 9/8 meter PSC 70 to 100

2 34mm² AAAC 9/8 meter PSC 70 to 100 14 PSEB, Punjab 1 80mm² ACSR 8/9 meter PCC 50

2 50mm² ACSR 8/9 meter PCC 60 3 30mm² ACSR 8/9 meter PCC 70

15 NDPL, Delhi 1 DOG (100mm2) ACSR

11 meter PCC

16 BRPL, Delhi 1 DOG (100mm2) ACSR

11 meter PCC

17. CSPDCL, Chhattisgarh

1 50mm² ACSR 8 meter PCC 100 2 50mm² ACSR 9 meter Rail poles 100

3 50mm² ACSR 9 meter RS Joists 100

4 50mm² ACSR 9 meter H Beams 100

5 30mm² ACSR 8 meter PCC poles 125

6 30mm² ACSR 9 meter RS Joists 100

A standard cost estimate for 1 km of 11 kV line with 55 sq. mm. AAA conductor over 8 meters PSCC poles at 60 meters span, 75 kg/sq.mt. wind pressure is given in Annexure-5.2.

122

Table-5.4

Comparative costs of 11 kV overhead line with different conductor sizes, supports at different span lengths (Cost Rs. in lakhs / km)

Cost of 11 kV linesSl. No.

Utility 50/55 mm2 AAAC on PSCC poles 50 to 75

meter span

34 mm2 AAAC on PSCC poles 50 to

65 meter span

80 mm2 ACSR on RCC/ PSCC

poles 105 meter span

50 mm2 ACSR on RCC/PSCC poles

50 to 80 meter span

50 mm2 ACSR on PSCC poles 100 meter span

50 mm2 ACSR on ST poles 50

to 80 meter span

55mm2 AAAC on 11 meter RSJ poles 50 meter span

50mm2 ACSR on 9 meter rail poles/RS Joists 100 meter span

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 1 APSPDCL,


2.12 to 2.15

1.49 to 1.52

1.67 to 1.71


2.16 to 2.58

2.37 to 2.91

2.00 to 2.23

2.24 to 2.36

5.03 8.40

3 TNEB, Tamil Nadu 2.47 2.65 1.98 to 2.20

2.15 to 2.40

4 UGVCL, Gujarat 1.94 1.98 1.52 1.56 5 MGVCL, Gujarat 1.90 2.13 1.54 1.89 6 MPPKVVCL,

Madhya Pradesh 1.78 1.95


2.38 2.50


3.88 to 5.13


1.98 2.18 2.21 2.17 to 2.65

2.90 3.19

10 CAEDCL, Assam 11 UAEDCL, Assam 12 CESU, Orissa 1.86 2.22 1.72 1.81 1.72 2.09 13 SOUTHCO, Orissa 1.99 2.09 1.67 1.69 1.81 1.92 14 PSEB, Punjab 1.89 1.99 15 NDPL, Delhi 16 BRPL, Delhi 17 CSPDCL, Chhattisgarh 1.85 - 2.64 to

3.69 -


1.98 to 2.91

1.49 to 2.23

1.56 to 2.24

2.47 2.65 1.98 to 2.21

2.00 to 2.65

1.81 to 2.38

1.78 to 2.50

2.90 to 4.10

3.19 to 5.13

5.03 8.40 2.70 to 3.70

-

123

Table-5.4 (Contd.) Comparative costs of 11 kV overhead line with different conductor sizes, supports at different span lengths (Rs. lakhs/km.)

Cost of 11 kV lines

Sl. No.

Utility 34 mm2 AAAC on PSC pole 100 meter span

34 mm2 AAAC on RS Joist pole 100

meter span

34 mm2 AAAC on ST pole 100

meter span

80 mm2 AAAC on PSC pole 50

to 70 meter span

30 mm2 ACSR on PSC/RCC

pole 6o to 100 meter span

30 mm2 ACSR on ST pole 75

meter span

100 mm2 AAAC on RS Joist 33

meter span

100mm2 ACSR on PSCC poles 50

meter span

(11) (12) (13) (14) (15) (16) (17) (18) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 1 APSPDCL,

Andhra Pradesh


3 TNEB, Tamil Nadu 1.89 2.10 - 4 UGVCL, Gujarat 6.71 689 5 MGVCL, Gujarat 6 MPPKVVCL,

Madhya Pradesh


8 UPCL, Uttarkhand 9 WBSEDCL,

West Bengal 1.43 1.54 1.60 1.65 to

2.07 2.47 2.72

10 CAEDCL, Assam 2.78 3.29* 3.47 4.10 3.33 3.95 - 4.34 to 5.15 *

11 UAEDCL, Assam 2.78 3.29* 3.47 4.10 3.33 3.95 - 4.34 to 5.15 *

12 CESU, Orissa 1.54 1.61 2.18 2.74 13 SOUTHCO, Orissa 1.55 1.57 14 PSEB, Punjab 2.30 2.60 1.76 1.95 15 NDPL, Delhi - 5.35 16 BRPL, Delhi 5.77 6.59 17 CSPDCL,

Chhattisgarh 1.37 -


1.54 to 3.29

3.47 4.10 3.33 3.95 2.18 to 2.30

2.60 to 5.15

1.60 to 1.89

1.65 to 2.10

2.47 2.72 6.71 6.89 5.77 5.40 to 6.60

Benchmark Costs for 11 kV line with 50/55 mm2 AAAC / ACSR over PSCC/RCC supports Rs. 2.00 to 2.50 lakhs/km. Benchmark Costs for 11 kV line with 30/34 mm2 AAAC/ACSR over PSCC/RCC supports Rs.1.50 to 2.20 lakhs/km. The lines constructed over Rail poles, ST poles and with higher size conductor and short spans in Assam and UPCL and other utilities are not brought under Benchmark costs. The costs would be Rs.2.50 to Rs.4.10 lakh/km. The costs for the utilities in Delhi with 100 mm2 ACSR over 9 meter PCC poles range from Rs.5.4 to 6.6 lakhs/km. Such lines and other specific lines with higher size conductor over special support etc. to be mentioned specifically by the utilities for approval of SERC/appropriate authority. For hilly areas separate benchmark costs are considered as follows:

UPCL & ASSCM: Rs. 4.00 to 5.00 lakhs

124

It is seen from Table-5.4 the benchmark costs for 11 kV line with 55/34 mm2 AAAC

and ACSR over PSCC and RCC supports would be Rs.1.50 lakh to Rs. 2.50 lakh

per km. In the case of UPCL and Assam where the cost would be Rs.2.80 lakh to Rs.4.10 lakh per km. In the case of NDPL and BRPL, Delhi, the 11 kV OH line with 100mm2 ACSR over PSCC supports ranges from Rs.5.50 to 6.60 lakhs per km.

(d) 11 kV Underground System


Tamil Nadu Electricity Board (iii) Madhya Gujarat Vij Company Limited and two

Utilities in Delhi are using underground cable system.

The cost of 11 kV underground system includes the cost of cable, road cutting, laying

of cable and road restoration charges. The road restoration charges are substantial

and the charges have to be paid as levied by the respective Municipal Corporations


restoration charges are given in Table 5.3 (a) below: The costs include cost of all


Table-5.3 (a) Costs of 11 kV Underground System

Sl. No. Name of the Utility



UG cable with 1x300 mm2 XLPE (3

circuits) 2007-08 2008-09 2007-08 2008-09 2007-08 2008-09

1 APCPECL (i) Cost of cable, accessories

laying, etc. 12.40 14.55


2 TNEB (i) Cost of cable, accessories

laying etc. 7.72 7.29 14.79 11.99

(ii) Road restoration charges 15.00 15.00 15.00 15.00 Total 22.72 22.29 29.79 26.99

3 MGVCL, Gujarat (i) Cost of cable, accessories

laying etc. 12.70 9.63

(ii) Road restoration charges - - Total 12.70 9.63

4 NPDL, Delhi (i) Cost of cable, accessories

laying etc. 20.74


12.75

Total 33.49

5 BRPL, Delhi (i) Cost of cable, accessories

laying etc. 14.88 15.38


125




excluding road restoration charges.

The benchmark costs for underground cable for 2008-09 for 3x300 mm2 XLPE


Km. in Andhra Pradesh (Hyderabad city) Rs.12 to 15 lakhs in Tamil Nadu and Rs.12 to 20 lakhs in Delhi. The benchmark costs for 3x185 mm2 XLPE under ground

cable with all accessories and laying could be Rs.10 to 14 lakh per Km. in Andhra

Pradesh and MGVCL in Gujarat.

The benchmark costs for 3x120 mm2 UG cable with all accessories and laying could

be Rs. 7 to 8 lakhs per Km. in Tamil nadu.

(e) LT overhead System

As explained in Chapter-4 the utilities construct different types of LT lines to serve

different categories of consumers.

LT 5 wire line is to service three phase consumers and street lights, 4 wire line to

service three phase loads mostly 3 phase residential, commercial, industrial and

agriculture loads, 3 wire line is to service single phase consumers along with street

lights and 2 wire line to feed exclusively, single phase consumers.

The utilities use 55 mm2 and 34 mm2 AAAC and ACSR, normally higher size

conductor for three phases and lower size for neutral and street lights or for all

phases and neutral based on load. As in the case of 33 kV and 11 kV lines the

utilities use mostly PSCC and RCC supports but of 8M with spans ranging 50 to 70

meters except UPCL which uses steel tubular poles with 40 meter span.

As in the case of 33 kV and 11 kV lines, the costs differ from utility to utility based on

the conductor size, number of wires, type of supports used, span lengths and

construction practices adopted.

The cost of LT lines are broadly categorised as 5 wire, 4 wire and 3 wire based on

conductor size and type of supports used with a range of span lengths to arrive at

range of costs and benchmark costs. The cost of LT lines in UPCL is high due to use

of steel tubular poles with shorter spans.

126

The costs in UPCL are treated separately as they do not fit into benchmark costs

comparable across all the utilities. The types of LT lines constructed by each utility

and the costs are given in Tables-5.5 and 5.6 respectively below. The benchmark

costs are arrived at based on the range of costs across the utilities.

Table-5.5

LT Line with Different sizes of Conductors, Type of Supports and Span lengths Sl. No. Utility Conductor Supports

Span lengths (Meters)

Others


1 3X55mm² + 2X34mm² AAAC

8 meter PSCC poles 65



3 5X34mm² AAAC 8 meter PSCC poles 65 4 5X34mm² AAAC 8 meter PSCC poles 60 5 3X55mm² + 1X34mm²

AAAC 8 meter PSCC poles 65



7 4X34mm² AAAC 8 meter PSCC poles 65 8 4X34mm² AAAC 8 meter PSCC poles 60 9 3X34mm² AAAC 8 meter PSCC poles 65 10 2X34mm² AAAC 8 meter PSCC poles 60


1 3x55 mm²+2x34 mm² AAAC


2 5x34 mm² AAAC 8 meter PSCC poles 65 3 3X55mm² + 1X34mm²

AAAC 8 meter PSCC poles 65

4 4X34mm² AAAC 8 meter PSCC poles 65 5 3X34mm² AAAC 8 meter PSCC poles 65 6 3X16mm² + 1X25mm² AB

cable 8 meter PSCC poles 65

3 TNEB, Tamil Nadu

1 3X7/3.35 +1 X7/2.59 mm ACSR

RCC poles 60

2 4X7/2.59mm ACSR RCC poles 75 3 3X7/2.59mm ACSR RCC poles 75 4 2X7/2.59mm ACSR RCC poles 75

4 UGVCL, Gujarat

1 3X55mm² + 2x34 mm² AAAC

RSJS 30



3 5X34 mm² AAAC 8 meter PSCC poles 30/50 4 3X55mm² + 1x34 mm²

AAAC RSJS poles 30





7 4X34 mm² AAAC 8 meter PSCC poles 30/50 8 3X34 mm² AAAC 8 meter PSCC poles 30/50 9 2X34 mm² AAAC 8 meter PSCC poles 50

5 MGVCL, Gujarat

1 3X55mm² + 2x34 mm² AAAC RSJS 50 2 5x34 mm² AAAC 8 meter PSCC poles 50 3 3x55mm2+1x34mm2 8 meter PSCC poles 50 4 3X34 mm² AAAC 8 meter PSCC poles 50

5 3x34 mm² AAAC 8 meter RSJS 50 6 2X34mm² AAAC 8 meter PSCC poles 50 6 MPKVVCL,

Madhya Pradesh 1 4X55mm² + 1x30 mm²

ACSR 8 meter PSCC poles 67

2 3X55mm² + 2x30 mm² ACSR


3 5X30mm² ACSR 8 meter PSCC poles 67 4 3X50mm² + 1x30 mm²

ACSR 8 meter PSCC poles 67

5 3X30mm² ACSR 8 meter PSCC poles 67

127


1 4X50mm² + 1x30 mm² ACSR

8 meter PCC poles 67

2 5X30mm² ACSR 8 meter PCC poles 67 3 3X50mm² + 1x30 mm²

ACSR 8 meter PCC poles 67

8 UPCL, Uttarkhand

1 4X80mm² + 1x7/16 SWG steel wire

S T Poles 40

2 2X30mm² ACSR + 1x7/16 SWG Steel wire

S T Poles 40

3 3X30mm² ACSR+ 1x7/16 SWG Steel wire

S T Poles 40

4 3X16mm² + 1x25 mm² AB cable

S T Poles 50

5 1X16mm² + 1x25 mm² AB cable

S T Poles 50


(a) 3Ph 4wire line 1 50 mm² AAAC 8 meter PCC poles 65 2 25 mm² AAAC 8 meter PCC poles 60 3 20 mm² ACSR 8 meter PCC poles 95 (STW) 4 25 mm² AAAC ST Pole

(In hilly area) 45

(b) 1Ph 2wire line 1 25 mm² AAAC 8 meter PCC poles 45 2 25 mm² AAAC ST pole

(in hilly area) 45

10 CAEDCL, Assam (a) 3Ph 4wire line 1 Squirrel

(20 mm²) AAAC 7.5 meter PCC poles 50

2 Squirrel (20 mm²) AAAC

7.5 meter RSJS 50


7.5 meter ST Poles 50

(b) 1Ph 2/3 wire line 1 Squirrel



7.5 meter RSJs 50


7.5 meter ST poles 50

11 UAEDCL, Assam (a) 3Ph 4wire line 1 Squirrel



7.5 meter RSJs 50


7.5 meter ST Poles 50

(b) 1Ph 2/3 wire line 1 Squirrel



7.5 meter RSJs 50


7.5 meter ST poles 50

12 CESU, Orissa 1 3X55mm² + 1x34mm AAAC


2 4X34 mm² AAAC 8 meter PSCC poles 50 3 2X34 mm² AAAC 8 meter PSCC poles 50 4 3X35+1X25 mm² AB cable 8 meter PSCC poles 50

13 SOUTHCO, Orissa

1 5X55 mm² AAAC 8 meter PSCC poles 50 2 5X34 mm² AAAC 8 meter PSCC poles 50 3 3X34 mm² AAAC 8 meter PSCC poles 50 4 3X35+1X25 mm² AB cable 8 meter PSCC poles 35

14 PSEB, Punjab

1 5X30mm² ACSR 8 meter PCC poles 67 2 4X30mm² ACSR 8 meter PCC poles 55 3 4X20mm² ACSR 8 meter PCC poles 55 4 3X50mm² + 1x20 mm²


5 3X30mm² ACSR + 1x20 mm² ACSR

8 meter PCC poles 67

6 4x20 mm² ACSR 8 meter PCC poles 67 15 NDPL, Delhi 1 4x100mm2 ACSR 9 meter PCC poles

128

16 BRPL, Delhi 1 4x100mm2 ACSR 9 meter PCC poles 17 CSPDCL,

Chhattisgarh 1 4x50+1x20mm2 ACSR 8 meter PCC poles 60 2 3x50+2x20mm2 ACSR 8 meter PCC poles 60 3 1x50+1x30+1.20mm2


4 3x50+1x20mm2 ACSR 8 meter PCC poles 60 5 3x30+1x20mm2 ACSR 8 meter PCC poles 60 6 3x30+1x20mm2 ACSR 8 meter PCC poles 60 7 2x30+1x20mm2 ACSR 8 meter PCC poles 60 8 3x50+2x30mm2 ACSR 9.3 meter RS Joists 45 9 3x80+2x30mm2 ACSR 9.3 meter RS Joists 45 10 2x30+1x20mm2 ACSR 9.3 meter RS joists 45 11 3x20mm2 ACSR 9.3 meter RS joists 45

A standard cost estimate for 1 km. of LT three phase 5 wire line (horizontal formation) 3X55 sk.mm + 2X34 sq. mm AAA conductor over 8 meters PSCC poles at 65 meters span, 75 kg/sq. mt. wind pressure is given in Annexure-5.3.

129

Table-5.6

Comparative costs of LT overhead line with different conductor sizes, supports at different span lengths (Cost Rs. in lakhs / km)

Sl. No.

Utility

Cost of LT Lines 3x55 mm2 + 2x34

MM2 AAAC on PSCC poles 50 to

65 meter span 5 wire line





34 mm2 AAAC on PSCC poles 60 to 70 meter span 4

wire

3x7/3.35 mm2 + 1x7/2.59 ACSR RCC poles 60

meter span 4 wire

4x7/2.59 mm2 ACSR on RCC poles 60 to 75

meter span 4 wire

3x7/2.59 mm2 ACSR RCC poles 75 meter span 3

wire line

3x50/55 mm2 + 1x30mm2 AAAC/ACSR PSCC poles 50 to 70

meter span 4 wire line

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 1 APSPDCL,


2.30 to 2.37

1.83 to 1.89

1.86 to 1.93

1.34 1.37 1.58 to 1.63

1.61 to 1.67

1.78 to 1.82

2.05 to 2.10


2.41 2.60 1.89 2.05 1.36 1.46 1.69 1.91 2.21 2.34

3 TNEB, Tamil Nadu 2.19 2.44 1.62 1.75 1.37 1.48 4 UGVCL, Gujarat 2.17 2.20 1.80 1.81 1.40 1.42 1.92 1.93 5 MGVCL, Gujarat 2.09 2.43 1.75 2.05 1.28 1.54 1.84 2.16 6 MPPKVVCL,

Madhya Pradesh 2.42 2.53 1.98 2.08 1.68 1.77 1.85 2.17


2.41 2.68 1.98 2.19 2.10 2.30


West Bengal

10 CAEDCL, Assam 11 UAEDCL, Assam 12 CESU, Orissa 1.46 1.53 1.84 1.90 1.98 2.45 13 SOUTHCO, Orissa 1.64 1.66 1.32 1.41 14 PSEB, Punjab 1.53 1.71 2.18 2.30 15 NDPL, Delhi 16 BRPL, Delhi 17 CSPDCL, Chhattisgarh 2.13 1.60 1.37 2.13 - Cost Range 2.03 to

2.42 2.30 to 2.68

1.64 to 1.98

1.66 to 2.08

1.28 to 1.68

1.37 to 1.77

1.58 to 1.84

1.61 to 1.91

2.19 2.44 1.53 to 1.62

1.71 to 1.75

1.37 1.48 1.78 to 2.21

1.93 to 2.45

130

Table-5.6 (contd.) Comparative costs of LT overhead line with different conductor sizes, supports at different span lengths

(Cost Rs. in lakhs / km) Sl. No.

Utility

Cost of LT Lines 20/25 mm2 AAAC on PSCC poles 50 meter

span 4 wire line

20/25 mm2 AAAC on ST poles /RSJs 50 meter span 4 wire

line

20 mm2 AAAC/ACSR on

PSCC poles on 95 meter span 4 wire

line

5x30 mm2 ACSR on PSCC poles 50 to 70 meter span

5 wire line

4x50/55 mm2 AAAC on PSCC poles 50 to 70


3x30 mm2 ACSR on ST poles 40


4x80 mm2 ACSR on ST poles 40

meter span

3x35 mm2 +1x25 mm2

AB Cable on PSCC poles 35 to 60 meter

span

(11) (12) (13) (14) (15) (16) (17) (18) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 1 APSPDCL,

Andhra Pradesh


3 TNEB, Tamil Nadu 4 UGVCL, Gujarat 5 MGVCL, Gujarat 6 MPPKVVCL,

Madhya Pradesh 1.98 2.08


1.98 2.19


2.10 to 3.14

4.52 5.13


2.05 2.40 to 2.83 *

2.96 - 1.41 1.54

10 CAEDCL, Assam 2.39 2.83 * 3.32 to 3.50

3.92 to 4.14 *

11 UAEDCL, Assam 2.39 2.83 * 3.32 to 3.50

3.92 to 4.14 *

12 CESU, Orissa 1.68 1.88 13 SOUTHCO, Orissa 2.18 2.19 1.88 2.41 14 PSEB, Punjab 1.98 2.19 15 NDPL, Delhi 5.12 16 BRPL, Delhi 5.60 6.34 17 CSPDCL, Chhattisgarh 3.58 - 1.42 - Cost Range 2.05 to

2.39 2.40 to 2.83

2.96 to 3.50

3.92 to 4.14

1.41 1.54 1.98 2.08 to 2.19

2.18 2.19 1.90 to 2.8

2.10 to 3.14

4.52 to 5.60

5.12 to 6.34

1.68 to 1.88

1.88 to 2.41

Benchmark costs for LT lines three phase 5 wire and 4 wire with 55 mm2 /34 mm2 AAAC / ACSR over PSCC/RCC supports Rs. 2.00 to 2.40 lakhs/km. Benchmark costs for LT lines 3 wire with 34 mm2 AAAC / ACSR over PSCC/RCC supports Rs. 1.30 to 1.60 lakhs/km.

The lines constructed over Rail poles, ST poles and PSCC poles with short span in Assam and UPCL and other utilities are brought separately under Benchmark costs. The costs would be Rs.5.5 to 6.4 lakhs for U mm2

ACSR, Rs.3.50 to 4.00 lakhs for 20/25mm2 AAAC. Such lines and specific lines with higher size conductor over special support etc. to be mentioned specifically by the utilities for approval of SERC/appropriate authority. NDPL and BRPL are constructing LT lines with 100mm2 DOG, ACSR, the cost of which is high. This is not considered for benchmarking.

* The costs are as per turnkey contracts.

131

It is seen from Table-5.6 the benchmark costs for LT three phase 4/5 wire lines would

be Rs.2.00 lakh to Rs.2.40 lakh per km and that of LT single-phase 3 wire line

would be Rs.1.30 lakh to Rs.1.60 lakh per km.

The costs in UPCL would however, be Rs.4.50 lakh to Rs.5.20 lakh per km for three

phase 4/5 wire line and Rs.2.00 to 3.20 lakh/km for single-phase 3 wire line. The

costs of 4 wire line with 100mm2 in NDPL and BRPL of Delhi would be Rs.5.5 to 6.4 lakhs per km. The LT lines constructed with higher size conductor in utilities in Delhi

are not considered for benchmarking.



Tamil Nadu Electricity Board and (iii) two Utilities in Delhi are using underground

cable system.

The cost of LT underground system includes the cost of cable, road cutting, laying of

cable and road restoration charges. The road restoration charges are substantial

and the charges have to be paid as levied by the respective Municipal Corporation


restoration charges are given in Table 5.6 (a) below: The costs include cost of all


Table-5.6 (a) Costs of LT Underground System

Sl.

No.

Name of the Utility LT UG cable with

3 ½ x95 mm2 XLPE LT UG cable with 3 ½ x120 mm2 XLPE

LT UG cable with 3 ½ x300 0 mm2

XLPE 2007-08 2008-09 2007-08 2008-09 2007-08 2008-09

1 APCPECL (i) Cost of cable,

accessories laying, etc. 3.60 4.87

(ii) Road restoration charges 3.60 4.87 7.20 9.74

2 TNEB (i) Cost of cable, accessories

laying etc. 3.58 3.96

(ii) Road restoration charges 12.00 12.00 15.58 15.96

3 NPDL, Delhi (i) Cost of cable,

accessories laying etc.


4 BRPL, Delhi (i) Cost of cable,


(ii) Road restoration charges 3.47 15.40

132




including road restoration charges.

The benchmark costs for underground cable for 2008-09 for 3 ½ x300 mm2 XLPE LT


Km. in Delhi. The benchmark costs for 3 ½ x120 mm2 XLPE LT under ground cable

with all accessories and laying could be Rs.4 to 5 lakh per Km. in TNEB.

The benchmark costs for 3 ½ x95 mm2 UG cable with all accessories and laying

could be Rs. 4 to 5 lakhs per Km. in Andhra Pradesh.

5.3.2 66/11 kV and 33/11 kV Substations (Receiving Stations)

Different utilities are adopting different practices in the layout of 33/11 kV substations,

power transformer capacities installed, number of 11 kV outgoing feeders, control

room etc. The costs differ based on the practices followed by each utility. The

practices followed by each of the utilities and methodology followed for benchmarking

the costs are dealt below:

(1) The utilities in Andhra Pradesh – APSPDCL installs 1x5 MVA transformer with 2

to 4 outgoing 11 kV feeders initially, as the load develops they install second

transformer. APCPDCL installs 1x5 MVA transformer in rural areas and 1 or 2x8

MVA or 2x5 MVA in urban areas with 3 to 5 outgoing 11 kV feeders. Provision is

made to install second transformer later in the substations with single power

transformer. The utilities do not provide 33 kV breakers either individual or group

control on HV side if it is either single transformer or two transformers upto 5

MVA. Since the utilities are constructing large number of substations mostly in

rural areas, they have simplified the layout of substations, with a small control

room. No compound wall is constructed, only outer fencing is provided in rural

areas. They also obtain land at no cost or at marginal cost as the consumers

generally donate the land or Government land is acquired. The costs are

generally low.

The substations are totally outdoor in APSPDCL and some indoor substations

mostly are constructed by APCPDCL in urban areas mostly in Hyderabad city.

133

(2) Tamil Nadu Electricity Board (TNEB) constructs both indoor and outdoor

substations. The indoor substations are mostly in Chennai and other cities. The

Board constructs the substation with 1x8 MVA or 2x8 MVA transformers with 3 to

4 outgoing 11 kV feeders. The land and control room costs are substantial.

Wherever substation is constructed with single transformer initially, provision is

made for installation of second transformer. In some substations the utility

constructs staff quarters and these are not considered for benchmarking costs.

(3) The utilities in Gujarat – UGVCL and MGVCL do not handle 33 kV system and

hence no 33/11 kV substations are constructed.

(4) The utilities in Madhya Pradesh – MPPKVVCL and MPMKVVCL construct 33 /11

kV substations with 1x1.6 MVA or 1x3.15 MVA or 1x5 MVA transformers initially

with 2 to 3 outgoing 11 kV feeders and add second transformer or replace the

existing transformer with higher capacity transformer as load develops. Provision

is made in the substation for installation of second transformer. The layout is

fairly simple.

(5) UPCL, Uttaranchal constructs the substations with 1x3.15 MVA or 1x5 MVA or

1x8 MVA transformer, based on the load. Second transformer is added later

based on load development for which provision is made in the layout.

(6) Punjab Electricity Board does not have 33 kV system under distribution.

However 66/11 kV substations are considered for this study.

PSEB installs 1x8 MVA or 1x12.5 MVA or 1x20 MVA transformer initially later

adds additional transformer or up-rate it with higher capacity transformer.

Provision is made in the layout to install second transformer later.

(7) West Bengal State Electricity Distribution Company Limited (WBSEDCL)

constructs the substations with 2x3.15 MVA or 2x5 MVA transformers. The utility

constructs substations partly indoor and partly outdoor. The transformers and 33

kV switchgear etc., is outdoor and 11 kV switchgear installed indoor. The layouts

are extensive and also the control rooms are fairly large. Hence the cost of land,

control room, land development costs etc., are high. The land acquired is stated

to be one and half acres against half an acre acquired in Andhra Pradesh.

However the cost of the land is not considered for benchmarking, as the extent

and value of the land differs from state to state. The value of land has to be

considered as per the State Government norms.

(8) The two utilities in Assam - the Central Assam Electricity Distribution Company

and Upper Assam Electricity Distribution Company construct the 33/11 kV

substations with 1x2.5 MVA or 2x2.5 MVA or 1x3.15 or 1x5 MVA or 2x5 MVA

transformers based on the load development in a particular area.

134

The substation layouts have provision for installation of second transformer

where a single transformer is installed initially.

(9) The utilities in Orissa – the Central Electricity Utility (CESU) and the Southern

Electric Supply Company construct the 33/11 kV substations with a single 3.15 or

5.0 MVA power transformer with provision for erection of a 2nd power transformer

later. In urban areas like Bhubaneswar, Cuttak etc. the substations are erected

with one or two 8 MVA power transformers with individual HV breaker control and

indoor switchgear for transformer LV side and 11 kV feeders control and

protection. In SOUTHECO, wherever two power transformers are erected, a

33 kV group control breaker is provided on HV side.

(10) BRPL, Delhi constructs 66/11 kV substations with 2x25 MVA power transformers

and 33/11 kV indoor substations with 2x20 MVA power transformers. In both the

cases the 11 kV capacitor banks are erected. In NDPL, Delhi 66/11 kV

substations with 2x20/25 MVA power transformers and capacitor bank are

constructed.

(11) Chhattisgarh State Power Distribution Company Limited (CSPDCL) constructs

33/11 kV outdoor substations with 1x1.6 MVA or 1x3.15 MVA or 1x5.0 MVA

power transformers depending on the existing demand. Provision is made in the

layout for erection of a second transformer at a later date depending on the load

development. 11 kV capacitor banks of 600 kVAR and 1200 kVAR are installed at

the substations for reactive compensation.

BENCHMARKING COSTS OF 33/11 KV SUBSTATIONS

The costs obtained from various utilities are discussed in Chapter-4. As mentioned

earlier the costs obtained are validated wherever required. The costs obtained are

segregated into cost of (i) civil works (ii) equipment and material costs including

cabling etc., and (iii) overheads – transport, erection, supervision, testing and

commissioning, etc. It is observed that the equipment, cabling costs etc., are fairly

comparable across the utilities. The cost of civil works are substantially high in some

cases, particularly in West Bengal. However, total costs including (i) civil works (ii)

equipment and erection costs and (iii) overheads are considered together to

benchmark costs. The costs of land and staff quarters, provided in some cases are

not considered for comparison of costs and benchmarking as the land costs differ

from state to state. Since the capacitor banks are not installed in all substations, the

cost of capacitor bank is added separately.

135

The practices followed by the utilities in construction of substations are given in

Table-5.7 and the comparative costs 33/11 kV substations in Tables-5.8 and 5.10.

The costs of 66/11 kV substations are analysed in para 5.3.5 (c).

Table-5.7

66/11 kV and 33/11 kV Substations (Outdoor) Sl. No.

Utility Voltage & capacity of transformers

Number of outgoing feeders

Availability of capacitor bank

Others


1 33/11kV, 1X5MVA 3 Yes 2 33/11kV, 1X5MVA 2 No 3 33/11kV, 1X5MVA 4 Yes


1 33/11kV, 1X5MVA 3 Yes 2 33/11kV, 1X5MVA 2 No 3 33/11kV, 1X5MVA 4 Yes 4 33/11kV, 2X5 MVA 5 Yes 5 33/11kV, 2x8MVA 6 Yes

3 TNEB, Tamil Nadu

1 33/11kV, 1X8MVA 3 Yes 2 33/11kV, 2X8MVA 3 Yes

4 UGVCL, Gujarat 1 33kV substations are not in existence 5 MGVCL, Gujarat 1 33kV substations are not in existence 6 MPPKVVCL,

Madhya Pradesh 1 33/11kV, 1X1.6 MVA 2 No 2 33/11kV, 1X3.15 MVA 3 Yes 3 33/11kV, 1X5 MVA 3 Yes


1 33/11kV, 1X1.6 MVA 2 No 2 33/11kV, 1X3.15 MVA 3 Yes 3 33/11kV, 1X5 MVA 3 Yes

8 UPCL, Uttarkhand

1 33/11kV, 1X3.15MVA 3 No 2 33/11kV, 1X5MVA 4 No 3 33/11kV, 1X8MVA 4 No


1 33/11kV, 2X3.15MVA 4 No 2 33/11kV, 2X6.3MVA 6 No

10 CAEDCL, Assam

1 33/11kV, 1X2.5MVA 4 No 2 33/11kV, 2X2.5MVA 6 No 3 33/11kV, 1X3.15MVA 6 No 4 33/11kV, 2X5.0MVA 6 No

11 UAEDCL, Assam

1 33/11kV, 1X2.5MVA 4 No 2 33/11kV, 2X2.5MVA 6 No 3 33/11kV, 1X3.15MVA 6 No 4 33/11kV, 2X5.0MVA 6 No

12 CESU, Orissa 1 33/11kV, 1X3.15MVA 3 No 2 33/11kV, 1X5.00 MVA 3 No 3 33/11kV, 1X8.0 MVA 5 No

13 SOUTHCO, Orissa

1 33/11kV, 1X3.15MVA 3 No 2 33/11kV, 1X5.00 MVA 3 No 3 33/11kV, 2X3.15MVA 3 No

14 PSEB, Punjab

1 66/11kV, 1X20MVA 8 No 2 66/11kV, 1X12.5MVA 6 No 3 66/11kV, 1X8MVA 5 No

15 NDPL, Delhi

1 66/11 kV 2x20 MVA 10 Yes 2 66/11 kV 2x25 MVA 10 Yes

16 BRPL, Delhi 1 66/11 kV 2x25 MVA 25 Yes 17 CSPDCL,

Chhattisgarh 1 33/11 kV 1x1.16 MVA 2 Yes 2 33/11 kV 1x3.15 MVA 2 Yes 3 33/11 kV 1x5.0 MVA 3 Yes

A standard layout and cost estimate for 33/11kV substation with 2X5 MVA power transformers are given in Annexure-5.5 (a) & 5.5 (b).

136

Table-5.8

Costs of 33/11 kV Substation (Outdoor) (Cost Rs. in lakhs)

Sl. No.

Utility

Cost of 33/11 kV Substation 1x5 MVA

transformer with 2 to 4 11 kV feeders and

capacitor bank

2x5 MVA transformers with 5 to 6 11kV feeder and

capacitor bank

1x8MVA transformers 3 to

4 outgoing feeders

2x8 MVA transformers 5

to 6 11 kV outgoing feeders

1x1.6 MVA CAGR power transformers

1x3.15 MVACAGR

Transformers with 3 to 6

outgoing feeder

2x3.15 MVA transformer with 4

to 6 outgoing feeders

2x6.3 MVA transformers

with 4 to 6 outgoing feeders

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09

1 APSPDCL, Andhra Pradesh 79.05 to

86.63

85.04 to

93.44

129.65 to 136.94

136 to 144.04

2 APCPDCL, Andhra Pradesh 87.39 to

93.00

93.71 to

94.24 - 146.65 183.85

3 TNEB, Tamil Nadu 135.19 131.39 - 237.11 4 UGVCL, Gujarat No 33/11 kV substations 5 MGVCL, Gujarat No 33/11 kV substations 6 MPPKVVCL,

Madhya Pradesh 106.47 98.70 150.47 147.95 53.65 55.72 77.04 73.62 123.76 112.87

7 MPMKVVCL, Madhya Pradesh 100.88 90.88 156.39 134.41 53.44 54.74 77.21 78.94 110.21 118.32

8 UPCL, Uttarkhand 128.36 125.82 170.53 180.50 82.78 83.50

9 WBSEDCL, West Bengal 165.98 180.64 to

285.26 * 192.32 252.0 *

10 CAEDCL, Assam 147.10 172.14 11 UAEDCL, Assam 153.95 180.00 12 CESU, Orissa 108.98 - - +293.20 77.53 - 13 SOUTHCO, Orissa 79.31 82.29 60.61 63.19 123.56 124.40 14 PSEB, Punjab No 33/11 kV substations 15 NDPL, Delhi No 33/11 kV substations 16 BRPL, Delhi No 33/11 kV substations 17 CSPDCL, Chhattisgarh 95.41 - 54.52 - 81.90 -

Cost Range 70 to 128 73.30 to 100

130 to 156

136 to 148

135 to 170

132 to 180 184 240 to

300 54 55 52 to 82

54 to 84

110 to 124

113 to 124 192.32 252

Note: All substations with single transformer have provision to install second transformer. + The cost includes 11 kV indoor VCB 13 panel control board.

137

Table-5.8 (contd.) Costs of 33/11 kV Substation (Outdoor) (Cost Rs. in lakhs)

Sl. No.

Utility

Cost of 33 kV Substation1x2.5 MVA transformer with 4 outgoing feeder

2x2.5 MVA transformers with 4-6 outgoing

feeders

2x5.0 MVA transformers with 4-6 outgoing feeders

(11) (12) (13) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09

1 APSPDCL, Andhra Pradesh 2 APCPDCL, Andhra Pradesh 3 TNEB, Tamil Nadu 4 UGVCL, Gujarat 5 MGVCL, Gujarat 6 MPPKVVCL,

Madhya Pradesh

7 MPMKVVCL, Madhya Pradesh 8 UPCL, Uttarkhand 9 WBSEDCL, West Bengal

10 CAEDCL, Assam 144.49 168.20 159.39 196.76 - 251.02 to 273.92 * 11 UAEDCL, Assam 144.49 168.20 159.39 196.76 251.02 to 273.92 * 12 CESU, Orissa 13 SOUTHCO, Orissa 14 PSEB, Punjab 15 NDPL, Delhi 16 BRPL, Delhi 17 CSPDCL, Chhattisgarh

Cost Range 144 168 159 197 - 250 to 274

Note: All substations with single transformers have provision to install second transformer. Benchmark costs for 33/11 kV substations outdoor depends on the capacity of the power transformer (s) in the substation. The benchmark cost would be as under Substation with 1x1.6 MVA – Rs.54 to Rs.55 lakhs / SS 1x3.15 MVA – Rs.77 to Rs.84 lakhs/SS 1x5.0 MVA – Rs.85 to Rs.100 lakhs/SS 1x8MVA – Rs.140 to Rs.170 lakhs

Substation with 2x3.15MVA – Rs.110 to 125 lakhs / SS (WBSEDCL-180 to 250) 2x5 MVA – Rs.135 to Rs,155 lakhs/SS 2x6.3 MVA – Rs.190 to Rs.260 lakhs/SS (This is specific to WBSEDCL) 2x8 MVA – Rs.185 to RS.240 lakhs/SS

The substation in hilly areas constructed by the utilities in Assam with 1x2.5 MVA, 1x3.15 MVA, 2x2.5 MVA and 2x5 MVA are much on the higher side and hence separate benchmarking is considered as follows:

1x2.5 MVA – Rs.144 to Rs.168 lakhs / SS 2x3.15 MVA – Rs.170 to Rs.180 lakhs/SS 2x2.5 MVA – Rs.160 to Rs.196 lakhs/SS 2x5.0 MVA – Rs.250 to Rs.274 lakhs/SS * The costs are as per turnkey contracts.

138

It is seen from Table-5.8 the costs of substations with similar capacity are compared

and cost range is obtained capacity-wise and the benchmarking costs are arrived

across various utilities, except Uttarkhand, West Bengal and Assam where the costs

are high due to large control room and construction costs etc., being high.

The benchmark cost for 33/11 kV substations (outdoor) work out to as under for

various transformer capacities:

Substation with 1x1.6 MVA – Rs.54 to Rs.55 lakhs / SS 1x3.15 MVA – Rs.77 to Rs.84 lakhs/SS 1x5.0 MVA – Rs.85 to Rs.100 lakhs/SS

1x8MVA – Rs.140 to Rs.170 lakhs

2x3.15MVA – Rs.110 to Rs.125 lakhs / SS 2x5 MVA – Rs.135 to Rs,155 lakhs/SS 2x6.3 MVA – Rs.210 to Rs.260 lakhs/SS (This is specific to WBSEDCL)

2x8 MVA – Rs.185 to RS.240 lakhs/SS The distribution companies have to indicate the cost of land separately and authority

for such costs.

(a) 33/11 kV Substations (Indoor)

APCPDCL and TNEB have 33/11 kV indoor substations with transformer capacities

of 5 MVA or 8 MVA. The utilities in Delhi have 66/11 kV substations. 33/11 kV

substations are not being constructed at present.

The details of 33/11 kV indoor substations being constructed and the costs are given

in Tables-5.9 and 5.10 respectively.

Table-5.9

33/11 kV Substations (Indoor)

Sl. No. Utility Voltage & capacity

of transformers

Number of

outgoing feeders

Availability of capacitor bank


1 33/11kV, X5MVA 5 Yes 2 33/11kV, X8MVA 6 Yes

2 TNEB, Tamil Nadu

1 33/11kV, 1X8 VA 4 Yes 2 33/11kV, 2X8 MVA 6 Yes

139

Table-5.10 Costs of 33/11 kV Substation (Indoor) (Cost Rs. in lakhs)

Sl. No.

Utility

Cost of 33/11 kV Substation 2x5 MVA

transformers with 5 to 6 Nos. 11 kV outgoing feeders

2x8 MVA transformers

with 5 to 6 Nos. 11 kV out going feeders

1x8 MVA transformers

with 4 Nos. 11kV out going feeders

2x8 MVA transformers 5 to

6 Nos. 11 kV outgoing feeders

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09



- 237.07 287.85

3 TNEB, Tamil Nadu 184.99 366.79 4 UGVCL, Gujarat 5 MGVCL, Gujarat 6 MPPKVVCL,

Madhya Pradesh



West Bengal

10 CAEDCL, Assam 11 UAEDCL, Assam 12 CESU, Orissa 13 SOUTHCO, Orissa 14 PSEB, Punjab 15 NDPL, Delhi 16 BRPL, Delhi 16 CSPDCL, Chhattisgarh

Cost Range 237 288 185 367 The Benchmark costs 33/11 kV Substation (Indoor) could be as under: Substation with 2x5 MVA Rs.235 to 240 lakhs per SS

1x8 MVA Rs.181 to 200 lakhs per SS 2x8 MVA Rs.350 to 370 lakhs per SS

140

As seen from the Table-5.10 the benchmark cost of 33/11 kV substation (indoor) with

2x5 MVA transformers would be Rs.235 lakh to Rs.240 lakhs. The benchmark costs

would Rs.350 lakh to Rs.370 lakh for 2x8MVA. For a substation with 1x8 MVA

power transformer capacity, benchmark costs are Rs.180 to 190 lakhs per

substation.

5.3.3 Distribution Transformer Stations

The utilities construct Distribution transformer stations with different transformer

capacities as given below:

- 15/16 kVA single phase

- 16 kVA, 25 kVA, 63 kVA, 100 kVA, 200 kVA, 250 kVA and 500 kVA three phase

The most commonly installed transformers are 15/16 kVA single phase, 16/25 kVA,

63 kVA and 100 kVA three phase. In few cases, mostly in urban areas, the utilities

install 200 kVA, 250 kVA and 500 kVA transformers.

The utilities in Andhra Pradesh normally install the distribution transformers upto 100

kVA on single pole structure or on a plinth and the other utilities on a double pole

structure.

The costs obtained include the cost of transformer, cost of structure, AB switch, LAs,

cabling, installation, etc.

The costs of distribution transformer stations are compared transformer capacity

wise. Except one or two, no utility is purchasing amorphous core and BEE star rating

transformers at present.

The capacities of distribution transformers installed by various utilities are given in

Table-5.11 and the costs obtained in Table-5.12. Table-5.11

Distribution Transformer Stations (Outdoor) Sl. No.

Utility Voltage Capacity of transformers

Type


1 11kV/230V 15KVA Single phase amorphous core

2 11kV/230V 15KVA Single phase oil immersed

3 11kV/433V 63KVA Three phase CSP 4 11kV/433V 63KVA Three phase

amorphous core 5 11kV/433V 100 KVA Three phase CSP 6 11kV/433V 100 KVA Three phase

amorphous core 2 APCPDCL, 1 11kV/230`V 15/16KVA Single phase

141

Andhra Pradesh 2 11kV/433V 25 KVA Three phase 3 11kV/433V 63 KVA Three phase 4 11kV/433V 100 KVA Three phase

3 TNEB, Tamil Nadu 1 11kV/433V 63 KVA Three phase CSP 2 11kV/433V 100 KVA Three phase CSP 3 11kV/433V 250 KVA Three phase CSP 4 11kV/433V 500 KVA Three phase CSP 5 22kV/433V 63KVA Three phase CSP 6 22kV/433V 100KVA Three phase CSP 7 22kV/433V 200KVA Three phase CSP 8 22kV/433V 250KVA Three phase CSP

4 UGVCL, Gujarat 1 11kV/433V 25KVA Three phase CSP 2 11kV/433V 63KVA Three phase CSP 3 11kV/433V 100KVA Three phase CSP 4 22kV/433V 63KVA Three phase CSP 5 22kV/433V 100KVA Three phase CSP

5 MGVCL, Gujarat 1 11kV/433V 25KVA Three phase CSP 2 11kV/433V 63KVA Three phase CSP 3 11kV/433V 100KVA Three phase CSP

6 MPPKVVCL, Madhya Pradesh

1 11kV/433V 16KVA Three phase CSP 2 11kV/433V 25KVA Three phase CSP 3 11kV/433V 63KVA Three phase CSP 4 11kV/433V 100KVA Three phase CSP 5 11kV/433V 200KVA Three phase CSP


1 11Kv/433V 16KVA Three phase 2 11kV/433V 25KVA Three phase 3 11kV/433V 63KVA Three phase 4 11kV/433V 100KVA Three phase

8 UPCL, Uttarkhand 1 11kV/433V 25KVA Three phase 2 11kV/433V 63 KVA Three phase 3 11kV/433V 100 KVA Three phase 4 11kV/433V 250 KVA Three phase 5 11kV/433V 400 KVA Three phase

9 WBSEDCL, West Bengal 1 11/0.4kV 10 KVA Three phase 2 11/0.4kV 25 KVA Three phase 3 11/0.4kV 63 KVA Three phase 4 11/0.4kV 100 KVA Three phase

10 CAEDCL, Assam 1 11/0.433kV 25 KVA Three phase 2 11/0.433kV 63 KVA Three phase 3 11/0.433kV 100 KVA Three phase 4 11/0.250kV 16 KVA Single phase

11 UAEDCL, Assam 1 11/0.433kV 25 KVA Three phase

2 11/0.433kV 63 KVA Three phase

3 11/0.433kV 100 KVA Three phase

4 11/0.250kV 16 KVA Single phase 12 CESU, Orissa 1 11/0.433kV 25 KVA Three phase

2 11/0.433kV 63 KVA Three phase 3 11/0.433kV 100 KVA Three phase 4 11/0.250kV 16 KVA Single phase

13 SOUTHCO, Orissa 1 11/0.433kV 25 KVA Three phase 2 11/0.433kV 63 KVA Three phase 3 11/0.433kV 100 KVA Three phase 4 11/0.250kV 16 KVA Single phase

14 PSEB, Punjab 1 11kV/433V 25KVA Three phase 2 11kV/433V 63 KVA Three phase 3 11kV/433V 100 KVA Three phase 4 11kV/433V 200 KVA Three phase 5 11kV/433V 250 KVA Three phase

142

15 NDPL, Delhi 1 11kV/433V 63 KVA Three phase

2 11kV/433V 160 KVA Three phase 3 11kV/433V 315 KVA Three phase 4 11kV/433V 400 KVA Three phase 5 11kV/433V 630 KVA Three phase 6 11kV/433V 990 kVA Three phase

16 BRPL, Delhi 1 11kV/433V 100 kVA Three phase 2 11kV/433V 400 kVA Three phase 3 11kV/433V 660 kVA Three phase 4 11kV/433V 990 kVA Three phase

17 CSPDCL, Chhattisgarh 1 11kV/433V 25 kVA Three phase 2 11kV/433V 63 kVA Three phase 3 11kV/433V 100 kVA Three phase 4 11kV/433V 200 kVA Three phase 5 11kV/433V 315 kVA Three phase 6 11kV/433V 500 kVA Three phase

A standard cost estimate for one number 100KVA distribution transformer station is given in Annexure-5.4.

143

Table-5.12

Distribution Transformer stations (Outdoor)(Cost Rs. in lakhs)

Sl. Utility Cost of Transformers Station (outdoor) 15/16 kVA

single phase CRGO core

transformers

16/25 kVA three phase CRGO transformers

63 kVA CSP transformers

100 kVA CSP transformers

100 kVA Amorphous

core transformers

200/250 kVA CRGO

transformers

315/400 kVA CRGO

Transformers

990 kVA Transformers

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09

1 APSPDCL, Andhra Pradesh 0.42 - - - 1.33 1.58 1.58 1.81 1.96 1.83 2 APCPDCL, Andhra Pradesh 0.41 0.43 0.84 0.98 1.19 1.52 1.69 1.72 3 TNEB, Tamil Nadu 1.012 - 1.88 1.97 - - 3.06 3.21 4 UGVCL, Gujarat 1.14 1.14 1.74 1.74 2.12 2.12 5 MGVCL, Gujarat 1.08 1.29 1.64 1.74 2.09 2.23

6 MPPKVVCL, Madhya Pradesh 1.04 to 1.09

1.09 to 1.33

1.45 1.75 1.94 2.35 - -

7 MPMKVVCL, Madhya Pradesh 1.11 to 1.21

1.32 to 1.45

1.54 1.88 1.95 2.47 - -

8 UPCL, Uttarkhand 1.01 1.15 1.45 1.65 2.10 2.39 - - 4.84 5.50 7.04 8.00 9 WBSEDCL, West Bengal 0.86 1.31 1.32 1.51 1.70 1.94

10 CAEDCL, Assam 1.36 1.61 1.69 2.05 2.10 2.39 2.42 2.56 - 5.37 11 UAEDCL, Assam 1.36 1.61 1.69 2.05 2.10 2.39 2.42 2.56 - 5.37 12 CESU, Orissa 0.89 0.95 1.62 1.73 2.07 2.78 2.39 2.55 13 SOUTHCO, Orissa 0.82 0.74 1.16 1.15 1.55 1.48 2.04 2.24 14 PSEB, Punjab 0.96 1.09 1.20 1.30 1.66 1.84 15 NDPL, Delhi 7.94 - 13.87 16 BRPL, Delhi 19.14 19.27 16 CSPDCL, Chhattisgarh 1.16 - 1.65 - 2.31 - 3.49 -


0.43 to 0.74

0.84 to 1.33

0.98 to 1.45

1.2 to 1.60

1.6 to 1.95

1.70 to 2.10

1.80 to 2.30

1.96 1.83 3.1 to 4.8

3.21 to 5.5

7 .00 8.00 19.14 14.00 to 19.30

The Benchmark costs for Distribution Transformer Stations (Outdoor) based on transformer capacity for other than Assam are as under.

• 15/16 kVA single phase Rs.0.40 to 0.60 lakhs per each. • 16/25 three phase Rs.1.00 to 1.40 lakhs per each. • 63 kVA three phase rs.1.60 to 2.00 lakhs per each.

• 100 kVA three phase Rs.1.90 to 2.20 lakhs per each • 200/250 kVA three phase Rs.3.0 to 3.2 lakhs per each. • 990 kVA three phase Rs.14.00 to 19.00 lakhs per each.

For hilly stations like Assam, the benchmarks are as follows: • 15/16 kVA single phase Rs.1.36 to 1.61 lakhs per each. • 16/25 three phase Rs.1.69 to 2.00 lakhs per each. • 63 kVA three phase rs.2.00 to 2.42 lakhs per each.

• 100 kVA three phase Rs.2.42 to 2.56 lakhs per each • 200/250 kVA three phase Rs.5.37 lakhs per each. • 350/400 kVA three phase Rs.7.00 to 8.00 lakhs per each.

144

It is seen from Table 5.12 that the range of benchmark costs for each distribution

transformers stations with different capacities of transformers would be as under:

15/16 kVA Single phase Rs. 0.40 lakhs to Rs.0.60 lakhs

16/25 kVA Three phase Rs. 1.00 lakhs to Rs.1.40 lakhs

63 kVA Three phase Rs. 1.60 lakhs to Rs.2.00 lakhs

100 kVA Three phase Rs. 1.90 lakhs to Rs.2.20 lakhs



(State specific to Delhi and Uttarkhand)

990 kVA Three phase Rs.14.00 lakhs to Rs.19.00 lakhs

(State specific to Delhi)

5.3.4 High Voltage Distribution System (HVDS)

HVDS is extensively being implemented in APSPDCL and APCPDCL of Andhra

Pradesh. Though estimates are sanctioned for implementing the HVDS in Madhya

Pradesh the works are not actually completed. Hence the costs of APSPDCL where

number of works are completed are taken for benchmarking.

The cost of 16 and 25KVA transformers and conversion costs are given in Table 5.13

below:

The following are the conversion costs of HVDS in APSPDCL.

Table – 5.13

Conversion cost of HVDS

S.N Details Cost per unit (Rs.)

1. Conversion of LT line into 11kV (HVDS) line (Per KM) 29,6202. Supply and erection of 16 KVA copper wound

distribution transformer, with all the accessories (each) 70,720

3. Supply and erection of 25 KVA copper wound distribution transformer, with all the accessories (each)

88,650

4. Supply and erection of LT AB cable (3X16+25mm²) per KM

49,670

5. Replacing the existing 50/63/100 KVA transformers and handing over to district stores (each).

1,050

The net conversion costs for converting LT line under existing 63 and 100 KVA

transformers to 11kV and replacing the 63 or 100 KVA transformer with small

capacity transformers and giving credit to the released transformer is given in Table

5.14.

145

Table-5.14

Conversion costs of HVDS, replacing different capacities of existing transformers

(Rs. in lakhs) S.N Details Cost obtained /

validated 2007-08 and

2008-09 1. Conversion of LT line to 11kV and replacement of 100 KVA

transformer with required number of 25 KVA transformers. 10.15

2. Conversion of LT line to 11kV and replacement of 63 KVA transformer with required number of 25 KVA transformers.

6.39


5.08


13.70


8.63


6.85

The benchmarks costs for HVDS for different items can be as follows.

1. Conversion of LT line into 11kV (HVDS) line (Per KM) could be Rs. 29,000 to

30,000.

2. Supply and erection of 16 KVA copper wound distribution transformer, with all the

accessories (each) could be Rs. 70,000 to 71,000

3. Supply and erection of 25 KVA copper wound distribution transformer, with all the

accessories (each) could be Rs. 88,000 to 90,000

4. Supply and erection of LT AB cable (3X16+1x25mm²) per KM could be Rs.

49,000 to 50,000

5. Replacing the existing 50/63/100 KVA transformers and handing over to district

stores could be Rs. 1000 to Rs.1100.

6. Conversion of LT lines to 11kV and replacement of 100 KVA transformer with

required number of 25 KVA transformers could be Rs. 10 to 11 lakhs.

7. Conversion of LT line to 11kV and replacement of 63 KVA transformer with





required number of 16 KVA transformers could be 13 to 14 lakhs.



146



5.3.5 66 kV System and 66/11 kV Substations

As discussed in chapter-4, the 66 kV network system comes under the control of

distribution companies NDPL and BRPL in Delhi. In the case of PSEB, an integrated

utility, the 66 kV lines are considered under distribution business, since no 33 kV

lines are presently being executed by them.

(a) 66 kV overhead lines

There are no 66 kV overhead lines managed by the distribution utilities other than

PSEB. The benchmark costs of 66 kV lines of PSEB are as indicated below:

i. 66 kV DC line on DC towers with 200 mm2 /150

mm2 ACSR with 250 meter span. Rs.18 to 22 lakh per km.

ii. 66 kV SC line on DC towers with 200 mm2 /150 mm2 ACSR with 250 meter span.

Rs.13 to 15 lakh per km.

iii. 66 kV SC line on SC towers with 200 mm2 /150 mm2 ACSR with 300 meter span.

Rs.9 to 14 lakh per km.

The above benchmarks are state specific applicable to Punjab.

(b) 66 kV Underground Cable System

The 66 kV underground cable system is implemented only by Delhi utilities – NDPL

and BRPL. The benchmark costs for the 66 kV underground cable system applicable

to Delhi could be as indicated below:

i. 66 kV underground cable line with

1CX1000 mm2 XLPE cable. Rs.170 to 180 lakhs per km.

ii. 66 kV underground cable line with 1CX630 mm2 XLPE cable.

Rs.80 to 90 lakhs per km.

The underground cable system costs vary from place to place and the benchmarks

referred above are state specific to Delhi.

(c) 66/11 kV Substations

The 66/11 kV substations of Delhi utilities NDPL and BRPL are not considered for

benchmarking, as the costs are considered high and the details of the costs are not

made available. The costs of 66/11 kV outdoor substations of PSEB are as indicated

below:

147

i. 1x20 MVA transformer and 8 Nos. 11 kV outgoing feeders

Rs.370 lakhs

ii. 1x12.5 MVA transformer and 6 Nos. 11 kV outgoing feeders

Rs.305 to 310 lakhs

iii. 1x8 MVA transformer and 5 Nos. 11 kV outgoing feeders

Rs.195 to 200 lakhs

5.3.6 Metering Equipment and Meters

The costs of metering equipment at 33 kV and 11 kV and the meters installed at HT

and LT installations - three phase and single phase are given in Table-5.15 below:

148

Table-5.15

Cost of Metering Equipment and Meters ( Rs.per item) Sl. No.

Utility

Cost of Metering Equipment and Meters33 kV metering equipment CTs

and Pts

11 kV metering

equipment (CTs and PTs)

Trivector meters

33 kV metering unit

(3+5)

11 kV metering unit

(4+5)

3 phase meters

whole current

Single phase meters

(1) (2) (3) (4) (5) (6) (7) (8) (9) 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09 07-08 08-09

1 APSPDCL, Andhra Pradesh 41073 34629 27200 28300 4000 3880 45073 38509 31200 32180 1462 1318 457 445 2 APCPDCL, Andhra Pradesh 31886 26100 4907 6671 36793 32771 1522 1681 553 462 3 TNEB, Tamil Nadu 53600 53100 35580 35117 7310 8040 60910 61140 42890 43157 1139 1337 594 576 4 UGVCL, Gujarat 33000 3850 2810 1550 1055 848 840 5 MGVCL, Gujarat 34300 3680 3810 2729 809 810 6 MPPKVVCL,

Madhya Pradesh 5900 99000 104000 81000 900


8 UPCL, Uttarkhand 5000 4900 960 9 WBSEDCL, West Bengal 13796 9170 7340 9418 - 1249

10 CAEDCL, Assam 26976 14780 41526 - 4720 4750 1234 1234 11 UAEDCL, Assam 26976 14780 41526 - 4720 4752 1234 1234 12 CESU, Orissa 38455 38455 15288 15288 9000 9000 47455 47455 24288 24288 1284 1284 402 to 826 402 to 826 13 SOUTHCO, Orissa - - 25272 41963 15485 13300 64423 64423 40757 55263 9524 9524 960 935 14 PSEB, Punjab 26872 26872 3803 30675 - 3370 1800 480 440 15 NDPL, Delhi 3600 - 1100 - 16 BRPL, Delhi 17 CSPDCL, Chhattisgarh 7225 - 2900 - 1000 -

Cost Range 41000 to 54000

34000 to

53000

27000 to

35000

26000 to

35000

3700 to

4000

3800 to

5000

45000 to

65000

40000 to

65000

32000 to

43000

33000 to

43000

1500 to

2700

1300 to

1800 450 to 900 450 to 900

The Benchmark cost for Metering Equipment and Meters are as under:

33 kV metering unit including meter – Rs.45,000 to 60,000/unit Trivector meter Rs.3800 to 5000 / unit3 phase meters Rs. 1300 to 1800 / unit

11 kV metering unit including meter – Rs.32,000 to 43,000 / unit Single phase meters Rs.450 to 900 / unit

149

It is seen that the benchmark costs of metering 33 kV,11 kV and LT consumers

would be as under.

33 kV Metering Rs.45000 to Rs. 60000 11 kV Metering Rs.32000 to Rs. 43000 Trivector meters Rs.3800 to Rs.5000 LT three phase meters Rs.1300 to Rs.1800 LT single phase meters Rs.450 to Rs. 900

5.3.7 Service Line Costs The service line costs furnished by various utilities are given in Table-5.16 below:

Table-5.16

Service Line Costs(LT) (in Rs.)

S. No Utility

Single phase

Domestic & Non-

domestic

Three phase Domestic

Three phase Non-domestic and Industrial

Street light Agriculture

Upto 5 HP 5 Hp to 20 HP Above 20 HP

1 APSPDCL 1900 3300 3300 3800 9600 2200 2900

2 APCPDCL 1900 5400 5400 5600 11000 2500 5000

3 TNEB 850 5040 5040 5040 9570 1600 5240

4 UGVCL 1800 8600 8600 995015200 to

18800 1930

5 MGVCL 2380 7760 7760 875014400 to

17900 2562

6 MPPKVVCL Data not received

7 MPMKVVCL Data not received

8 UPCL Data not received

9 WBSCDCL 3160 13970 13970 13970 22900 10 CAEDCL 2980 9640 9640 9640 183930 11 CAEDCL 2980 9640 9640 9640 183930

12 CESU 2040 13120 13120 13120 13750 2730 3230

13 SOUTHCO 2300 4110 4890 4890 6450 2580 4910

14 PSEB 2830 9420 10590 10590 *625

15 NDPL 3000 7000 7000 1100016000 to

31000

16 BPRL 3000 7000 7000 1100016000 to

31000 * without meter.

The benchmark costs of service line (LT) would be as under : Single phase domestic and non- domestic Rs. 1800 to 3000 Three phase domestic Rs. 5000 to 7000 Three phase non-domestic and industrial i) upto 20 HP Rs. 5000 to 9000 ii) Above 20 HP Rs. 9500 to 18000 Street Lights Rs. 1600 to 2600 Agriculture Rs. 3000 to 5000

A standard arrangement for service connections and the cost estimates are given in Annexures 5.6(a) to 5.6(j). The service line costs for HT are to be considered, case to case basis depending on the length and size of cable, requirement of equipment etc.

150

5.3.8 Norms for other Overheads

The cost of overheads such as labour charges, transportation, supervision,

contingences etc., being adopted by various utilities in their cost estimates are given

in Table-5.17 below in terms of percentage of estimates cost.

Table-5.17

Overhead costs adopted by various utilities

S.N Utility

Storage and handling charges

Labour & transport charges

Estt & General charges

Contingencies

T&P on materials

Overhead charges

1. APSPDCL - 10% 10% 3% 1%

2. APCPDCL 3% 10% 10% 3% -

3. TNEB - 15% 15% 1% -

4. UGVCL 2% 10% 15% - -

5. MGVCL 2% 10% 15% 3% 2%

6. MPPKVVCL 2.5% 5-20% 2.5% 5% 1.5%

7. MPMKVVCL 2.5% 5-20% 2.5% 5% 1.5%

8. UPCL - 20-30% 15% 3% -

9. WBSEDCL - 10-20% 15% 5% -

10. CAEDCL - 40% on material

15% 3% -

11. UAEDCL - 40% on material

15% 3% -

12. CESU 3% 17.5% - 3% 2% 6%

13. SOUTHCO 3% 17.5% - 3% 2% 6%

14. PSEB, Punjab 2.5% Labour lumpsum Transport-

2.5%

10% 1% 1.5% -

15. NDPL, Delhi - - 15% 3% - -

16. BRPL, Delhi - - 10% 3% - -

17. CSPDCL, Chhattisgarh

2.5% Lump sum 2.5 5% 1.5% -

But on analysis of the actual costs involved in the execution of different elements it is

found that overall overhead costs like stores handling, labour, transport, supervision

and Estt. Charges etc, as a whole vary from one element to another in distribution

business. Where the material and equipment costs involved are high the overhead

costs, as a percentage of total costs have to be less. Thus, the following overhead

costs for different elements are found to be reasonable.

151

33/11 kV Sub-stations 18% of the total costs

Distribution Transformer Stations 15% of the total cost

33 kV and 11 kV lines 28% of total cost

LT Lines 30% of total cost

Service connections (LT) 25% of total cost

152

Annexure - 5.1

Standard cost estimate per km of 33 kV line with 100 Sq.mm AAA Conductor Over 9.1 Mts. PSCC Poles at 65 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 280 kgs at the rates

ruling during 2008-09 S.No Particulars Qty Rate in Rs. Per Unit Amount in

Rs. 1 9.1 M PSCC Poles 16 2400 Each 38400

2 1.53 M Channel / 'V' Cross Arm 14 1317 Each 18438

3 Top Clamp with Cleat 14 354 Each 4956

4 Back Clamps 14 177 Each 2478

5 Stay sets complete 6 1238 Each 7428

6 Bracing set with double cross arm 1 6845 Set 6845

7 100 Sq. mm AAA Conductor 3.06 49000 KM 149940

8 33 kV Pin - Insulator with Pin 45 271 Each 12195

9 Strain Insulator set with (3X11kV B&S insulator with 33kV hard ware fitting)

6 723 Set 4338

10 Concerting of poles, stay sets & Base concreting

LS LS 18771

11 Misc. Items like coil earthing, pipe earthing, danger-boards, bolts & nuts etc.

LS LS 4500

Total 268289

Contingencies (3% on items 1 to 9) 7350

Total cost of materials 275639

*Labour, transport, Estt & supervision and other charges(28%)

77179

Total cost 352818

* As recommended in the report.

153

Annexure - 5.2

Standard cost estimate per km of 11 kV line with 55 Sq.mm AAA Conductor Over 8 Mts. PSCC Poles at 60 Mts Span, 75 kg / Sq. Mt. Wind pressure, working load 140 kgs at the rates ruling

during 2008-09 S.No Particulars Qty Rate

in Rs. Per Unit Amount in Rs.

1 8.0 M PSCC Pole 18 1250 Each 22500

2 1.07 M Channel / 'V' cross arm 16 588 Each 9408

3 Top Clamp with Cleat 16 354 Each 5664

4 Back Clamps 16 126 Each 2016


6 Bracing set with double cross arm 1 4810 Set 4810


8 11 kV Pin - Insulator with Pins 54 64 Each 3456

9 Strain Insulator set with metal parts 6 261 Each 1566

10 Concerting of poles, stay sets & Base concreting

LS LS 20000

11 Misc. Items like coil earthing, pipe earthing. Danger-boards, bolts & nuts etc.

LS LS 4000

Total 165136


Total Cost of Material 169370


47424

Total cost 216794


154

Annexure - 5.3

Standard cost estimate per km of LT 3- Ph 5 wire line (Horizontal formation) 3x55 Sq.mm + 2 x34 Sq.mm AAA Conductor Over 8 Mts. PSCC Poles at 65 Mts Span, 75 kg / Sq. Mt. Wind

pressure, working load 140 kgs at the rates ruling during 2008-09

S.No Particulars Qty Rate

in Rs. Per Unit Amount in Rs.

1 8.0 M PSCC Pole 16 1250 Each 20000

2 LT 3 Phase cross arms 18 348 Each 6264

3 LT top fitting 18 193 Each 3474

4 Back Clamp 18 66 Each 1188




8 Shackle Insulator with metal parts 16 28 Each 448

9 LT pin insulator with pin 56 25 Each 1400

10 CI Knob 16 10 Each 160

11 Concerting of pole, stay sets & Base concreting

LS 18000

12 Misc. Items like coil earthing, pipe earthing. Danger-boards, bolts & nuts etc.

LS 3000

Total 174328


Total Cost of Material 178928


53678

Total Cost 232606


155

Annexure - 5.4

Standard cost estimate for 100KVA distribution transformer station at the rates ruling during 2008-09

S.N Particulars Qty Rate in Rs.

Per Unit Amount in Rs.

1 9.1M RCC poles 2 2400 E 4800 2 Base plates 2 62 E 124 3 Transformer structure materials including

of structure clamps 1 13333 Set 13333

4 11KV AB Switch (200Amps) 1 5760 Set 5760 5 11kV HG Fuse 1 1894 Set 1894 6 11kV LAs 3 364 E 1092 7 Dist. transformer 100 KVA, 11kV/433V 1 110000 E 110000 8 CI Pipe earthing (3 Nos.) 1 9833 E 9833 9 Stay sets 4 591 Set 2364 10 Guy insulators 4 10 E 40 11 Jumpering materials 1 465 Set 465 12 Concreting 1 1500 LS 1500 13 LT LAs 3 109 E 327 14 LT metering arrangement with CTs

including cables connections, cleat arrangement

1 8632 Set 8632

15 LT fixed capacitor 2X9 KVAR unit 1 5140 Set 5140 16 Bolts, nuts, binding wire etc.

(Bolts & Nuts 2.5"x5/8" - 10Kg + Binding wire 10 SWG - 5Kg)

1 810 LS 810

Total 166114 Contingencies 3% 4983 Total Cost of materials 171097 *Labour, transport, Estt & supervision

and other charges(15% of total cost) 25665

Grand Total 196762 * As recommended in the report.

156

Annexure - 5.5 (a)

Detailed Estimate For Erection of 33/11 kV Sub-Station with 2 x 5 MVA Power Transformers and NF = 4 Nos. 11 kV Feeders

S.No Particulars Qty Rate

(Rs. in Lakhs)

Unit Amount (Rs. in lakhs)

1 Control Room Cum Consumer Service Centre (including furniture)

LS LS 2.500

2 Station Auxillaries a Peripheral, Security Fencing, Approach road,

retaining wall around switchward with gravel filling gate and borewell

LS LS 6.360

b Yard Lighting LS LS 0.350c Fire Fighting Equipment LS LS 0.300d P&T Phone and Wireless set LS LS 1.2503 Foundations for structures, PTRs & breakers LS LS 5.0004 Bus bar, Jumpers, Connectors Clamps etc LS LS 2.0005 Control Cables LS LS 1.8006 Structural Steel LS MT 7.0057 Transformer a 33/11 kV 5 MVA Power Transformer 2 31.65 Each 63.300b 11 kV / 433 V 16 kVA Stn. Transformer 1 0.433 Each 0.4338 Circuit Breakers (including Trivector Meter) a 33 kV GVCB 1 3.74 Each 3.740b 20 kA 11 kV Feeder VCB including Control panel

(NF=4) 4 2.576 Each 10.304

c 20 kA 11 kV LV VCB including Control Panel 2 3.19 Each 6.3809 Control Circuit Panels a AC Supply Panel 1 0.275 Each 0.275b Alarm Panel 1 0.275 Each 0.275

10 Instrument Transformer a 11 kV P.T 3 Phase 1 0.186 Each 0.186

11 Lightening Arrestors a 33 kV 10 kA 6 0.04 Each 0.240b 11 kV line type (NF=4) 12 0.004 Each 0.048c 11 kV Station Type 10 kA 3 0.026 Each 0.078

12 Isolating Switches a 33 kV 800 A AB Switch 3 0.286 Each 0.858b 11 kV 800 A AB switch (NTx1+1) 2 0.175 Each 0.350c 11 kV 400 A AB switch (NFx2+2) 10 0.061 Each 0.613

13 24 Volts 40 AH Battery Set including Battery charger 2 0.112 Each 0.22414 2 MVAR 11 kV Capacitor Bank along with associated

capacitors 1 7.03 Each 7.030

15 Earthing of power transformer, VCBs, AB switches, structures with 75x8 mm GI Flat

LS 3.000

Total 123.99916 Contingencies (3%) on items 6 to 15 3.72 Total material cost 127.719

17 *Labour, transport, Estt & supervision and other charges(18% )

22.99

Total cost 150.71 * As recommended in the report.

157

Annexure-5.5 (b)

158

Annexure – 5.6(a)

Standard cost estimate for domestic, non domestic, single phase service connection

S.N Description Rate Unit Quantity Amount 1. Single phase high precision meter

2.5-10A, 5-20A 800 Each 1 800-00

2. 15A, MCB/Fuse unit 200 Each 1 200-003. Moulded distribution box 500 Each 1 500-004. PVC cable single core

2.65 Sq MM 3.43 Meter 60 206-00

5. GI wire No. 8 48 Kg 1 48-006. PVC pipe 20MM 10 Meter 2 20-007. PVC bends 20 MM 5 Each 2 10-008. Misc. (Lumpsum) - - 100-00 TOTAL 1884-00 3% contingencies on materials 57-00 Total cost of materials 1941-00 *Labour, transport, Estt &

supervision and other charges (25%)

486-00

Total cost 2427-00* As recommended in the report.

159

Annexure – 5.6(b)

Standard cost estimate for three phase domestic, non-domestic service connection

S.N Description Rate Unit Quantity Amount 1. Three phase AC high precision

meter 10-14amps 1800 Each 1 1800.00

2. Three phase 60AMCB/Fuse unit

955 Each 1 955.00

3. Moulded distribution box 500 Each 1 500.004. PVC cable

6.00Sq MM 5.10 Each 120 612.00

5. GI wire No. 8 48 Kg 1 48.006. PVC pipe 20MM 10 Meter 2 20.007. PVC bends 20 MM 5 Each 2 10.008. Misc. Items - - 300.00 Total 4245.009. Contingencies 3% 127.00 Total 4372.0010. *Labour, transport, Estt &

supervision and other charges(25%)

1093.00

Total cost 5465.00* As recommended in the report.

160

Annexure – 5.6 (c)

Standard cost estimate for three phase industrial service upto 20HP S.N Description Rate (Rs.) Unit Quantity Amount (Rs.) 1. Three phase high precision

electronic meter 10-40amps 1800 Each 1 1800.00

2. Three phase 60AMCB/Fuse unit

955 Each 1 955.00


8.00Sq MM 8.10 Meter 120 972.00

5. GI wire No. 8 48 Kg 1 48.006. PVC pipe 38MM 15 Meter 2 30.007. PVC bends 38 MM 10 Each 2 20.008. Misc. Items LS - 300.00 Total 4625.009. Contingencies 3% 139.00 Total 4764.0010. *Labour, transport, Estt &


1191.00

Total cost 5955.00* As recommended in the report.

161

Annexure – 5.6 (d)

Standard cost estimate for three phase industrial service above 20HP S.N Description Rate Unit Quantity Amount 1. LT Three phase class 0.5

accuracy CT operated energy meters

6500 Each 1 6500.00


10.00Sq MM 9.00 Meter 120 1080.00

4. GI wire No. 8 48 Kg 1 48.005. PVC pipe 38MM 15 Meter 2 30.006. PVC bends 38 MM 10 Each 2 20.007. Misc. Items LS - 200.00 Sub total 8878.008. Contingencies 3% 266.009. Total 9144.0010. *Labour, transport, Estt &


2286.00

Grand total 11430.00* As recommended in the report.

162

Annexure – 5.6 (e)

Standard cost estimate for street light service connection S.N Description Rate Unit Quantity Amount 1. LT single phase electronic meter

10A – 60A 800 Each 1 800.00

2. Single phase 15A, MCB / fuse unit

200 Each 1 200.00

3. Light sensitive switch 310 Each 1 310.004. PVC cable 4 Sq MM single core 4.00 Meter 15 60.005. PVC pipe 25 MM 20 Meter 2 40.006. PVC bends 25MM 15 Each 2 30.007. Moulded distribution box 500 Each 1 500.008. Misc. LS LS 50.00 Total 1990.009. Contingencies 3% 60.00 Total cost of materials 2050.0010. *Labour, transport, Estt &


512.00

11. Grand total 2562.00* As recommended in the report.

163

Annexure – 5.6 (f)

Standard cost estimate for agricultural service connection S.N Description Rate

(Rs.)

Unit Quantity Amount

1. GI pipe 40 MM 200 Meter 5 1000-002. PVCS cable 6 mm2 5.1 Meter 21 107-003. PVC cable 2.65MM 3.43 Meter 7.1 24-004. Arial fuse 32A 39 Each 3 117-005. B type box 700 Each 1 700-006. Meter board 250 Each 1 250-007. SPIC cutout with fuse unit 32

Amps 60 Each 3 180-00

8. 3 phase AC high precision meter 10 to 40 Amps

1800 Each 1 1800-00

9. Coil earthing, bolts, nuts, binding wire etc

LS 150 150-00

10. Cost of materials 4328-00 Contingencies 3% 130-00 Total cost of materials 4458-00 *Labour, transport, Estt &


1114-00

Total cost 5572-00* As recommended in the report.

164

Standard arrangement for single phase service connection Anneuxre-5.6 (g)

165

Standard arrangement for three phase industrial service connection with bare wires. Annexure-5.6 (h)

166

Standard arrangement for three phase industrial service connection with insulated wires. Annexure-5.6 (i)

167

Standard arrangement for three phase agricultural service connection Annexure-5.6 (j)

168

6. Analysis of the Increase in Capital Costs and Correlation with the Relevant Index of

Industrial Production 6.1 The scope of assignment includes –

• Analysis of the increase in capital cost over the last five years and correlation with

the index for engineering goods and any other relevant index of industrial

production.

• Design of a cost – indexation formula that can be validated using data of previous

years and incorporated in the model.

• Creation of a model for self-validation of the capital cost benchmarks, so that the

benchmarks are automatically revised as data of new projects gets added to the

data base.

6.2 As required under the scope of work, the range of benchmark costs for different

elements of Distribution Business are recommended in the previous chapter, by

compiling the recent capital cost data, as incurred by the utilities during the last two

years.

All out efforts were made to obtain the capital cost data for different elements of

distribution business, for the last 5 years (i.e from 2004-05 onwards). But the

complete data could not be obtained from all the utilities. An effort is made, with the

available data, to analyse the increase in the capital cost of different elements in

distribution over the last 5 years and correlate with a combined price index number,

to match the composition of material used, which are in different proportions for

different elements.

These index numbers are published by the Economic Survey, Government of India,

every year. The combination of price index numbers mentioned above relate to the

cost of civil works, different equipment (manufactured products), iron & steel etc used

for the execution of the particular element in distribution business. But the capital

cost of a substation or a line or a distribution transformer station includes the other

costs such as labour, transport etc. The completed costs of various elements and a

composite price index number for each element is arrived at based on the costs of

different components involved for execution of each element.

169

The detail analysis and work sheet of arriving at the composite price index numbers

for different elements are given in Annexure – 6.1.

While arriving at the composite price index numbers, the following break up of costs

between material and labour as per our analysis are considered for different

elements.

S.N Item Costs involved in materials, equipment,

civil works etc

Costs involved in labour, transport, supervision etc.

1. 33/11kV substation 82% 18% 2. 33kV lines 72% 28% 3. 11kV lines 72% 28% 4. Distribution transformer stations 85% 15% 5. LT lines 70% 30%

6.3 The correlation between the composite price index numbers and capital costs

To develop correlation between composite price index and capital costs normally the

simple device adopted for estimating the value of one variable from the value of the

other is a line drawn through the points plotted in such a manner as to represent the

average relationship between the two variables. Such a line is called the ‘line of

regression’. The simplest method of determining the course of this line is to draw it

on the chart free hand in such a way that it passes through the centre of the points,

but such a method is highly subjective. A more objective method of locating the line

is needed and the most popular method is the one known as the method of ‘least

squares’.

The most common criterion for selecting a straight line to show the average

relationship between two variables is that the squared deviations of the actual plotted

points from the point directly above or below it on the regression line be minimum.

The name ‘least squares’ is derived from this criterion. The straight-line trend is

represented by the equation:

Yc = a + b . x

where ‘Yc’ is the value of the dependent variable, ‘a’ is the intercept ‘y’, or the value

of the ‘y’ variable where x=0, ‘b’ represents the slope of the line or the amount of

change in the ‘Y’ variable that is associated with a change of one unit in the ‘x’

variable and ‘x’ is the independent variable ‘Yc’ is used to designate the regression

values to distinguish them from the actual ‘Y’ values.

170

For fitting a regression line by the method of least squares requires the determination

of the value of ‘a’ and ‘b’ for the equation of the straight line that will satisfy the

criterion that the sum of the squared differences between ‘Yc’ and ‘Y’ values be

minimum.

A relationship is evaluated between the composite price index number of each

element (as worked out in Annexure 6.1) and the capital costs of various elements in

distribution business.

It is required to obtain the value of capital cost of a particular element of distribution

business in a particular year for a given value of the composite price index number in

that particular year. Thus the composite price index number is taken on x-axis, and

the capital costs of the element in question on ‘Y’ axis.

6.4 Formula to Develop Correlation

Consultants have computed the data for the capital costs of different elements, in

distribution business for 5 years (i.e) from 2004-05 to 2008-09 from different utilities

to the extent available. The composite price index number is arrived based on

different index numbers for different components given in Economic Survey, every

year (as indicated in Annexure 6.1).

From the data available for 5 years, (from 2004-05 to 2008-09) the values of the

constants ‘a’ and ‘b’ are to be computed by the following formulae, for different

elements of distribution business.

b = n. Σxy – Σx. Σy n. Σx2 – (Σx)2

Here, the values of ‘x’ have been taken as those of composite price index and ‘y’ as

capital costs of particular element of distribution business.

‘n’ is the number of years for which, the values are taken into account, the value of ‘n’

being ‘5’ in this particular case.

6.5 An illustration for the correlation of one element of distribution business, (i.e) capital

costs of 33kV lines with 80/100mm2 AAAC/ACSR over PSCC/RCC supports is given

in Table-6.1 below:

a = Σx2 Σy – Σx. Σxy n. Σx2 – (Σx)2

171

Table-6.1

Composite Index Number – Capital Costs / Km. of 33 kV Line with RCC/PSCC poles

Year Composite index Capital cost of 1KM of 33kV line with

80/100mm2 AAAC/ACSR over PSCC/RCC supports (Rs. Lakhs)

2004-05 187.19 2.59 2005-06 191.00 2.83 2006-07 205.59 3.07 2007-08 227.56 3.15 2008-09 232.39 3.33

While arriving at the capital cost for a particular year, the average of the normative

range of the capital costs obtained / validated for all the utilities put together is taken

into consideration.

The working details for arriving at the average of the normative capital costs for

different elements for different years are given in Annexures-6.2 (a) to 6.2 (f)

From the above available values, the values of the constants ‘a’ and ‘b’ are derived,

using the above formula for the capital cost of 1 Km of 33kV line.

The values of the constants ‘a’ and ‘b’ obtained for the 33kV line with PSCC/RCC

poles are as follows:

a = 0.2649

b = 0.0131

If the capital cost (Yc) of 33kV line PSCC/RCC poles is worked back using these

values of the constants, as below, the values of Yc will be as given in Table-6.2

below:

Yc = a + bx

Table-6.2

Capital Costs of 33 kV Line

Year Capital costs of 33kV line Yc using the above constants a & b

Average capital costs given in

Table –6.1 % variation

2004-05 2.712 2.59 (-) 4.72 2005-06 2.762 2.83 (+) 2.40 2006-07 2.953 3.07 (+) 3.82 2007-08 3. 240 3.15 (-) 2.86 2008-09 3.303 3.33 (+) 0.81

Thus there is a variation of + 3.82 % to (-) 4.72% only between the actual values and

the values obtained by using these constants.

172

The capital cost of the 33kV line / KM for the year 2009-10, or any subsequent year

(Yc) can be arrived at, where the composite price index ‘X’ as obtained in Annexure –

6.1, (for the corresponding year) is known, as below:

Yc = a + bx

= 0.2649 + 0.0134 . X

With the same procedure, the constants ‘a’ and ‘b’ for different elements of

distribution business are arrived at as given below:

S.N Elements in distribution business Value of ‘a’ Value of ‘b’

I 33kV line / KM a. With 80/100mm² AAAC/ ACSR over PSCC /

RCC supports 0.2649 0.0131

b. With 80/100mm² AAAC/ ACSR over rail poles (-) 0.6469 0.0219II 11kV line with 34/50mm² AAAC/ACSR over

PSCC/ RCC supports (-) 1.1705 0.0136

III Distribution transformer stations a. 15/16 KVA single phase (-) 0.1236 0.0028b. 16/25 KVA Three phase (-) 0.9177 0.0094c. 63 KVA three phase (-) 2.0518 0.0171d. 100 KVA three phase (-) 1.2870 0.0148e. 250 KVA three phase (-) 2.8887 0.0288f. 400/500 KVA three phase (-) 16.7666 0.1139IV LT lines a Three phase 5 wire and 4 wire with

55mm²/34mm² AAAC/ACSR over PSCC / RCC supports

(-) 0.2024 0.0097

V 33/11kV substation a. 33/11kV SS with 1X1.6MVA power

transformers (-)116.7080 0.7825

b. 33/11kV SS with 1X3.15 MVA power transformers

(-)108.4042 0.8686

c. 33/11kV SS with 1X5 MVA power transformers (-)71.8930 0.7548d. 33/11kV SS with 2X3.15 MVA power

transformers 55.8739 0.2942

e. 33/11kV SS with 2X5 MVA power transformers (outdoor)

3.9318 0.6309

f. 33/11kV SS with 2X8 MVA power transformers (outdoor)

(-)75.8767 1.2775

Only the substations for which data is available for all the five years from 2004-05 to

2008-09 are included in the model.

The revised values of the constants ‘a’ and ‘b’ can be obtained every 3 or 4 years,

where the actual details for capital costs for different elements of distribution

business are available, correlating them with the values of price index numbers for

relevant components, and consumer price index for the corresponding years.

173

The contract between the benchmarks arrived based on the current market prices

(2008-09) and those obtained by applying the model (a & b values) for certain

elements is given in the Table below:

S.N Name of the element The benchmark as per

actuals of 2008-09 The cost obtained by applying the model developed for the year 2008-09

1 33/11kV substation with 2X5 MVA power transformers

Rs. 145.00lakh (Rs. 135 to 155 lakhs)

Rs. 143.37 lakh

2 33kV line with 80/100mm2 AAAC/ACSR over PSCC/RCC supports

Rs. 3.30lakh (Rs. 3 to 3.60 lakhs)

Rs. 3.303 lakh

3 100 KVA three phase distribution transformer station

Rs. 2.05 lakh (Rs. 1.90 to 2.20 lakhs)

Rs. 2.031 lakh

It can be seen the variations are very marginal between the two.

6.6 Methodology adopted for arriving at the capital costs of different elements of

distribution business, for the different years. Efforts were made to obtain the actuals of capital costs of different elements of

distribution business for the years 2004-05 to 2008-09 from all the utilities. But the

data on all elements could not be obtained from all the utilities.

The data obtained for a particular year, for an element of distribution business, from

those utilities, from whom the data could be obtained / validated was taken into

account, and the normative range of the capital cost decided. The average of this

range is considered for the particular year. Similarly, the capital costs of different

elements of distribution business are arrived at for different years.

While fixing the Benchmark capital costs in Chapter – 5, the following ranges were

adopted for different elements, from which average of the range worked out in

column’4’.

S.N Name of elements Benchmark

range Average of the

range % variation of

the range I 33/11kV substation

a. 33/11kV SS with 1X1.6MVA power transformers

Rs.54 to 55 lakhs Rs. 54.5 lakhs (+) or (-) 0.9%



c. 33/11kV SS with 1X5 Rs.85 to 100 Rs. 92.75 lakhs (+) or (-) 8.52%

174

MVA power transformers

lakhs

d. 33/11kV SS with 1X8 MVA power transformers (outdoor)

Rs.140 to 180 lakhs Rs. 160 lakhs (+) or (-) 12.5%

e. 33/11kV SS with 2X3.15 MVA power transformers

Rs.110 to 130 lakhs Rs. 120 lakhs (+) or (-) 8.3%

f. 33/11kV SS with 2X5 MVA power transformers

Rs.135 to 155 lakhs Rs. 145 lakhs (+) or (-) 7%

g. 33/11kV SS with 2X8 MVA power transformers (outdoor)


II 33kV line / KM

a. With 80/100mm² AAAC/ ACSR over PSCC / RCC supports

Rs. 3.00 to 3.60 lakhs Rs. 3.3 lakhs (+) or (-) 9%

b. With 80/100mm² AAAC/ ACSR over rail poles

Rs. 5.20 to 5.75 lakhs Rs. 5.475 lakhs (+) or (-) 5.02%

III

11kV line with 34/50mm² AAAC/ACSR over PSCC/ RCC supports

Rs. 2.00 to 2.50 lakhs Rs. 2.25 lakhs (+) or (-) 11%

IV Distribution transformer stations

a. 15/16 KVA single phase

Rs. 0.40 lakhs to 0.60 lakhs Rs. 0.5 lakhs (+) or (-) 20%

b. 16/25 KVA Three phase

Rs. 1.00 lkhs to 1.40 lakhs Rs. 1.20 lakhs (+) or (-) 16.7%

c. 63 KVA three phase Rs. 1.60 lakhs to 2.00 lakhs Rs. 1.80 lakhs (+) or (-) 11%

d. 100 KVA three phase Rs. 1.90 lakhs to 2.2 lakhs Rs. 2.05 lakhs (+) or (-) 7.3%

e. 250 KVA three phase Rs. 3.00 lakhs to 3.2 lakhs Rs. 3.1 lakhs (+) or (-) 3.23%

f. 400/500 KVA three phase

Rs. 7.00 lakhs to 8.00 lakhs Rs. 7.5 lakhs (+) or (-) 6.67%

V LT lines

a

Three phase 5 wire and 4 wire with 55mm²/34mm² AAAC/ACSR over PSCC / RCC supports

Rs. 2.00 lakhs to 2.24 lakhs Rs. 2.2 lakhs (+) or (-) 10%

After obtaining a single value of capital cost for each element, the range can be

given, with the percentage variation given in the last column.

For future also, the same % variations over the Yc values obtained for different

elements have to be allowed for arriving at the range of the capital cost for that

particular element.

175

6.7 Model Developed

The model developed to arrive at the Benchmark cost of new project is given in

Annexure-6.3.

The soft copy of the model is also furnished.

The benchmark costs of all the elements of distribution business during a particular

year could be obtained, by feeding in the known price index during that year in place

of X1 X2 etc. for different elements. The corresponding benchmark costs for that year

for different elements are obtained from the model.

6.8 Application of Model to Arrive at New Benchmark Costs

The values of ‘a’ and ‘b’ are constants for different elements which are derived and

indicated in the table earlier.

For finding out the benchmark capital costs (Yc) of any element during a particular

year (say 2009-10), the value of the composite index (X) for that year has to be fed in

the model, to know the benchmark capital costs of that element.

The question is, how to know the value of the composite index, during a particular

year. If the economic survey data for that year is already published, the index can be

obtained from the published book. If it is not published by that date, some realistic

value of the composite index has to be entered based on previous year data.

6.9 CAGR of Capital Costs of Different Elements

The capital costs of different elements of distribution business for different years from

2004-05 to 2008-09 are taken into consideration, and the CAGR is arrived. To arrive

at a more practical CAGR from 2004-05 to 2008-09 the method of moving averages

is adopted i.e., the CAGR of (i) 1st 3 years i.e 2004-05 to 2006-07 (ii) next 3 years (i.e

2005-06 to 2007-08) (iii) the next 3 years (i.e 2006-07 to 2008-09) and (iv) the last

two years (i.e 2007-08 and 2008-09) are arrived at. Then the average of all these

values is arrived at. The values of CAGR thus obtained for different elements from

2004-05 to 2008-09 are indicated in the table below. In the same table (i) the

accepted benchmark costs for 2008-09 (ii) the estimated benchmark costs for 2009-

10, by applying the CAGR (iii) the estimated benchmark costs for 2009-10 as per the

model explained earlier by adopting an estimated composite price index (based on

176

the CAGRs from 2004-05 – 2008-09 for different elements) are indicated in Table-6.3

below:

Table-6.3

Estimated Benchmark Costs for 2009-10

S.N Name of the element

CAGR of capital costs for the years 2004-05 to

2008-09 (%)

Accepted average

benchmark costs for 2008-09

(Rs. lakhs)

Estimated Benchmark

cost for 2009-10 with the CAGR in

column (3) (Rs. Lakhs)

Estimated Benchmark

cost for 2009-10, assuming a composite price index based on CAGR for composite price index number of different

elements f for 2009-10

(Rs. Lakhs) (1) (2) (3) (4) (5) (6)

I 33kV line / KM

a

With 80/100mm² AAAC/ ACSR over PSCC / RCC supports

5.98 3.33 3.529 3.472

b With 80/100mm² AAAC/ ACSR over rail poles

12.04 5.48 6.140 5.08

II

11kV line with 34/50mm² AAAC/ACSR over PSCC/ RCC supports

14.04 2.25 2.566 2.25

III Distribution transformer stations

a 15/16 KVA single phase 7.10 0.5 0.536 0.53

b 16/25 KVA Three phase 10.37 1.2 1.324 1.30

c. 63 KVA three phase 15.92 1.80 2.087 1.98

d 100 KVA three phase 11.70 2.05 2.290 2.21

e 250 KVA three phase 8.74 3.10 3.371 3.63

f. 400/500 KVA three phase 25.54 7.5 9.416 9.03

IV LT lines

a

Three phase 5 wire and 4 wire with 55mm²/34mm² AAAC/ACSR over PSCC / RCC supports

7.68 2.20 2.369 2.26

V 33/11kV substation

a. 33/11kV SS with 1X1.6MVA power transformers

20.56 54.50 65.705 65.46

177


13.13 80.30 90.843 93.80

c. 33/11kV SS with 1X5 MVA power transformers

8.89 92.75 100.99 103.84

d. 33/11kV SS with 2X3.15 MVA power transformers

2.92 120.00 123.504 124.37

e. 33/11kV SS with 2X5 MVA power transformers

5.67 145 153.222 150.81

f. 33/11kV SS with 2X8 MVA power transformers

9.77 212.50 233.261 221.52

It could be seen from the above table the estimated benchmark values obtained by

applying the CAGR of capital costs and those obtained as per the model are close.

It is suggested to adopt the model in preference to the CAGR method, as the price

index numbers are more authenticated and it is fair to correlate the values with them.

178

Annexure – 6.1

Composite Price Index numbers for different elements in distribution business

I. 33/11kV Substations

The main cost components of a typical 33/11kV substation related to price indices

are as follows:

(i) Cement used in civil works.

(ii) Iron and steel which are mainly used in the substation structures, earthing and

civil works for reinforcement etc.

(iii) Equipment such as transformers, circuit breakers, isolators, lightning arrestors,

cables, batteries, conductor etc.

The index numbers for the above components can be captured from Economic

Survey.

Based on the cost of each component (as a percentage) in a typical substation the

index number for the material and equipment part including civil works can be arrived

at.

As per our analysis, it is considered that the costs of equipment, structures and civil

works contribute for 82% of the cost of substation and 18% of the cost is involved in

transport, erection, supervision etc. While the price index numbers mentioned above

could be applied for equipment, structures, civil works etc. the all India consumer

price index number for industrial workers (general) is considered to take care of the

establishment, transport, labour charges etc.

The analysis of typical substation with different transformer capacities bring out the

following cost components other than labour, transport etc.

S.N Type of 33/11kV SS Cost

component for cement

Cost component for iron, steel

and Ferro alloys

Cost component for

manufactured products

1. 1X1.6 MVA transformer 5% 12% 83% 2. 1X3.15 MVA transformer 5% 12% 83% 3. 1X5 MVA transformer 5% 11% 84% 4. 1X8 MVA transformer 4% 11% 85% 5. 2X3.15 MVA transformer 4% 11% 85% 6. 2X5 MVA transformer 4% 10% 86% 7. 2X8 MVA transformer 3% 10% 87%

179

Based on the cost components mentioned above, the composite index is arrived at

for different years as below for different years for substations with different capacities

of transformers.

1. 33/11kV substation with 1X1.6 MVA power transformer Common price index number for civil works, structure material and equipment.

S.N Year Price

index of cement*

5% column

(3)

Price index of iron steel and ferro

alloys

12% of column

(5)

Price index of manufactured

products

83% of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9) 1. 2004-05 164 8.2 244 28.28 166.3 138.03 174.51

2. 2005-06 186 9.3 225 27 171.4 142.26 178.56

3. 2006-07 210 10.5 260 31.20 179.0 148.57 190.27

4. 2007-08 221 11.05 348 41.76 187.9 155.96 208.77

5. 2008-09 226 11.3 284 34.08 203.1 168.57 213.95

Composite Price Index number for 33/11kV substation with 1x1.6MVA transformer

including labour transport etc.

S.N Year

Common price index

Nos. for equipment etc. as in

column (9) above

82% of column

(3)

All India consumer price index (industrial workers general)

18% of item (5)

Composite price

index for 33/11kV

Substation(4) + (6)

(1) (2) (3) (4) (5) (6) (7) 1. 2004-05 174.51 143.10 201.55 36.28 179.38

2. 2005-06 178.56 146.42 210.08 37.81 184.23

3. 2006-07 190.27 156.02 224.32 40.34 196.36

4. 2007-08 208.77 171.19 238.68 42.96 214.15

5. 2008-09 213.95 175.44 260.21 46.84 222.28

180

2. 33/11kV substation with 1X3.15 MVA power transformer

Common price index number for civil works, structure material and equipment.

S.N Year Price

index of cement*

5 % column

(3)


alloys

12% of column

(5)


products

83 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9) 1. 2004-05 164 8.2 244 29.28 166.3 138.03 175.51

2. 2005-06 186 9.3 225 27.0 171.4 142.26 178.56

3. 2006-07 210 10.5 260 31.2 179.0 148.57 190.27

4. 2007-08 221 11.05 348 41.76 187.9 155.96 208.77

5. 2008-09 226 11.3 284 34.08 203.1 168.37 213.95



S.N Year

Common price index


column (9) above

82% of column (3)


18% of item (5)

Composite price

index for 33/11kV

Substation(4) + (6)

(1) (2) (3) (4) (5) (6) (7) 1. 2004-05 175.51 143.92 201.55 36.28 180.20

2. 2005-06 178.56 146.42 210.08 37.81 184.23

3. 2006-07 190.27 156.02 224.32 40.34 196.36

4. 2007-08 208.77 171.19 238.68 42.96 214.15

5. 2008-09 213.95 175.44 260.21 46.84 222.28

181

3. 33/11kV substation with 1X5 MVA transformer


S.N Year Price

index of cement*

5 % column

(3)


alloys

11 %of column

(5)


products

84 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 8.2 244 26.84 166.3 139.69 174.73

2. 2005-06 186 9.3 225 24.75 171.4 143.98 178.03

3. 2006-07 210 10.5 260 28.60 179.0 150.36 189.46

4. 2007-08 221 11.05 348 38.28 187.9 157.84 207.17

5. 2008-09 226 11.3 284 31.24 203.1 170.60 213.14

Composite Price Index number for 33/11kV substation with 1x5MVA transformer


S.N Year

Common price index


column (9) above

82% of column (3)


18% of item (5)

Composite price

index for 33/11kV

Substation(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 174.73 143.28 201.55 36.28 179.56

2. 2005-06 178.03 145.98 210.08 37.81 183.79

3. 2006-07 189.46 155.36 224.32 40.34 195.70

4. 2007-08 207.17 169.88 238.68 42.96 212.84

5. 2008-09 213.14 174.77 260.21 46.84 221.61

182



S.N Year Price

index of cement*

4 % column

(3)


alloys

11 %of column

(5)


products

85 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 6.56 244 26.84 166.3 141.36 174.76

2. 2005-06 186 7.44 225 24.75 171.4 145.69 177.88

3. 2006-07 210 8.4 260 28.26 179.0 152.15 189.81

4. 2007-08 221 8.84 348 38.28 187.9 159.72 206.84

5. 2008-09 226 9.04 284 29.04 203.1 172.64 210.72



S.N Year

Common price index


column (9) above

82% of column (3)


18% of item (5)

Composite price

index for 33/11kV

Substation(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 174.76 143.30 201.55 36.28 179.58

2. 2005-06 177.88 145.86 210.08 37.81 183.68

3. 2006-07 189.81 155.64 224.32 40.34 195.99

4. 2007-08 206.84 169.61 238.68 42.96 212.57

5. 2008-09 210.72 172.79 260.21 46.84 219.63

183

5. 33/11kV substation with 2X3.15 MVA transformer


S.N Year Price

index of cement*

4 % column

(3)


alloys

11 %of column

(5)


products

85 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 6.56 244 26.84 166.3 141.36 174.76

2. 2005-06 186 7.44 225 24.75 171.4 145.69 177.88

3. 2006-07 210 8.4 260 28.6 179.0 152.15 189.15

4. 2007-08 221 8.84 348 38.28 187.9 159.72 206.84

5. 2008-09 226 9.04 284 31.24 203.1 172.64 212.92



S.N Year

Common price index


column (9) above

82% of column (3)


18% of item (5)

Composite price

index for 33/11kV

Substation(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 174.76 143.30 201.55 36.28 179.58

2. 2005-06 177.88 145.86 210.08 27.81 183.67

3. 2006-07 189.15 155.10 224.32 40.34 195.44

4. 2007-08 206.84 169.61 238.68 42.96 212.57

5. 2008-09 212.92 174.59 260.21 46.84 221.43

184



S.N Year Price

index of cement*

4 % column

(3)

Price index of iron steel

and ferro alloys

10 %of column

(5)


products

86 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 6.56 244 24.4 166.3 143.02 173.98

2. 2005-06 186 7.44 225 22.5 171.4 147.40 177.34

3. 2006-07 210 8.4 260 26.0 179.0 153.94 188.34

4. 2007-08 221 8.84 348 34.8 187.9 161.59 205.23

5. 2008-09 226 9.04 284 28.4 203.1 174.67 212.11



S.N Year

Common price index


column (9) above

82% of column (3)


18% of item (5)

Composite price

index for 33/11kV

Substation(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 173.98 142.66 201.55 36.28 178.94

2. 2005-06 177.34 145.42 210.08 37.81 183.23

3. 2006-07 188.34 154.44 224.32 40.34 194.78

4. 2007-08 205.23 168.29 238.68 42.96 211.25

5. 2008-09 212.11 173.93 260.21 46.84 220.77

185

7. 33/11kV substation with 2X8 MVA transformer Common price index number for civil works, structure material and equipment.

S.N Year Price

index of cement*

3 % column

(3)

Price index of

iron steel and ferro

alloys

10 %of column

(5)


products

87 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 4.92 244 24.4 166.3 144.68 174.0

2. 2005-06 186 5.58 225 22.5 171.4 149.12 177.20

3. 2006-07 210 6.30 260 26.0 179.0 155.73 188.03

4. 2007-08 221 6.63 348 34.8 187.9 163.47 204.90

5. 2008-09 226 6.78 284 28.4 203.1 176.70 211.88



S.N Year

Common price index


column (9) above

82% of column (3)

All India consumer price index

(industrial workers general)

18% of item (5)

Composite price index for 33/11kV Substation

(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 174.0 142.68 201.55 36.28 178.96 2. 2005-06 177.20 145.30 210.08 37.81 183.12 3. 2006-07 188.03 154.18 224.32 40.34 194.53 4. 2007-08 204.90 168.02 238.68 42.96 210.98 5. 2008-09 211.88 173.74 260.21 46.84 220.58

From the above it could be seen that the composite index numbers worked out for

33/11kV substations with different capacities of transformers vary marginally (less

than 1%). Hence, it is reasonable to adopt only one composite index number for all

the 33/11kV substations with different capacities of transformers as below:

Adopted composite index numbers for 33/11kV substations with different capacities of transformers Year Composite price index number 2004-05 179.5 2005-06 184 2006-07 195 2007-08 211 2008-09 221

II. 33kV Overhead Lines The main cost components of 33kV overhead lines are as follows.

(i) Cement used in RCC/PSCC poles and for concreting.

186

(ii) Iron and steel which are used in the RCC/PSCC poles, cross arms, stay wires,

earthing etc and entire supports in the case of RS Joists and rail poles.

(iii) Equipment and other materials such as insulators, ACSR/AAAC, which is

covered under manufactured products.

The cost components (as a percentage) for above three items for a typical 33kV

overhead line are analyzed and arrived at as follows:

Item For lines with RCC/PSCC poles

(%)

For lines with RS Joists/ Rail poles

(%) I. Cement 10 2 II. Iron and steel 20 51 III. Insulators, conductor etc

(manufactured products) 70 47

For arriving at the composite index, it is considered that the costs of RCC/PSCC

poles and equipment / material contribute to 72% of the total cost of 33kV lines and

transport, erection and supervision contribute to 28% of the cost.

Based on the cost components mentioned above, the composite index number is

arrived at as follows:

1. 33kV overhead line with RCC/PSCC poles Common price index number for civil works, structure material and equipment.

S.N Year Price index of cement*

10 % column (3)

Price index of iron steel and ferro alloys

20 %of column (5)

Price index of manufactured products

70 %of column (7)

Common price index number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)1. 2004-05 164 16.4 244 48.8 166.3 116.41 181.61 2. 2005-06 186 18.6 225 45.0 171.4 119.98 183.58 3. 2006-07 210 21.0 260 52.0 179.0 125.30 198.30 4. 2007-08 221 22.1 348 69.6 187.9 131.53 223.23 5. 2008-09 226 22.6 284 56.8 203.1 142.17 221.57

Composite Price Index number for 33kV overhead line with RCC/PSCC poles

including labour, transport etc.

S.N Year

Common price index


column (9) above

72% of column (3)


28% of item (5)

Composite price index for 33kV lines with

RCC/PSCC poles

(4) + (6)

(1) (2) (3) (4) (5) (6) (7)1. 2004-05 181.61 130.76 201.55 56.43 187.19 2. 2005-06 183.58 132.18 210.08 58.82 191.00 3. 2006-07 198.30 142.78 224.32 62.81 205.59 4. 2007-08 223.23 160.73 238.68 66.83 227.56 5. 2008-09 221.57 159.53 260.21 72.86 232.39

187

2. 33kV overhead lines with RS Joists / Rail poles Common price index number for civil works, structure material and equipment.

S.N Year Price

index of cement*

2 % column

(3)

Price index of


alloys

51 %of column

(5)


products

47 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 3.28 244 124.44 166.3 78.16 205.88

2. 2005-06 186 3.72 225 114.75 171.4 80.56 199.03

3. 2006-07 210 4.20 260 132.6 179.0 84.13 220.93

4. 2007-08 221 4.42 348 177.48 187.9 88.31 270.21

5. 2008-09 226 4.52 284 144.84 203.1 95.46 244.82

Composite Price Index number for 33kV overhead lines with RS Joists / Rail poles


S.N Year

Common price index


column (9) above

72% of column (3)


28% of item (5)

Composite price index for 33kV lines with RS Joists and

Rail poles (4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 205.88 148.23 201.55 56.43 204.662. 2005-06 199.03 143.30 210.08 58.82 202.12 3. 2006-07 220.93 159.07 224.32 62.81 221.88 4. 2007-08 270.21 194.55 238.68 66.83 261.38 5. 2008-09 244.82 176.27 260.21 72.86 249.13

III. Distribution transformer stations

The cost components (percentage) for different capacities of distribution transformer

centres, as analysed are as follows.

S.N Type of 33/11kV SS Cost

component for cement

(%)

Cost component for iron, steel and

Ferro alloys (%)

Cost component for manufactured

products (%)

1. 15/16 kVA single phase 1 17 82 2. 16/25 kVA Three phase 1 16 83 3. 63 kVA Three phase 1 15 84 4. 100 kVA Three phase 1 15 84 5. 250 kVA Three phase 2 5 93 6. 400 kVA Three phase 2 4 94

Based on the cost components, mentioned above, the composite index numbers for

different capacities of transformers are arrived at as follows:

188

1. 15/16 kVA Single Phase distribution transformer


S.N Year Price index of cement*

1 % column (3)

Price index of iron steel and ferro alloys

17 %of column (5)

Price index of manufactured products

82 %of column (7)

Common price index number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 1.64 244 41.48 166.3 136.37 179.49

2. 2005-06 186 1.86 225 38.25 171.4 140.55 180.66

3. 2006-07 210 2.10 260 44.20 179.0 146.78 193.08

4. 2007-08 221 2.21 348 59.16 187.9 154.08 215.45

5. 2008-09 226 2.26 284 48.28 203.1 166.54 217.08

Composite Price Index number for 15/16 kVA single phase distribution transformer


S.N Year

Common price index


column (9) above

85% of column (3)


15% of item (5)

Composite price index for 15/16

kVA single phase

distribution transformer

(4) + (6) (1) (2) (3) (4) (5) (6) (7)

1. 2004-05 179.49 152.57 201.55 30.23 182.80

2. 2005-06 180.66 153.56 210.08 31.51 185.07

3. 2006-07 193.08 164.12 224.32 33.65 197.77

4. 2007-08 215.45 183.13 238.68 35.80 218.93

5. 2008-09 217.08 184.52 260.21 39.03 223.55

189

2. 16/25 kVA three phase distribution transformer


S.N Year Price

index of cement*

1 % column

(3)


and ferro alloys

16 %of column

(5)


products

83 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9) 1. 2004-05 164 1.64 244 39.04 166.3 138.03 178.71

2. 2005-06 186 1.86 225 36.00 171.4 142.26 180.12

3. 2006-07 210 2.10 260 41.6 179.0 148.57 192.27

4. 2007-08 221 2.21 348 55.68 187.9 155.96 213.85

5. 2008-09 226 2.26 284 45.44 203.1 168.57 216.27

Composite Price Index Number for 16/25 kVA three phase distribution transformer


S.N Year

Commonprice

index Nos. for

equipment etc. as in

column (9) above

82% of column (3)



18% of item (5)

Composite price index for

16/25 kVA three phase distribution transformer

(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 178.71 146.54 201.55 36.28 182.18

2. 2005-06 180.12 147.70 210.08 37.81 185.08

3. 2006-07 192.27 157.66 224.32 40.38 197.37

4. 2007-08 213.85 175.36 238.68 42.96 217.01

5. 2008-09 216.27 177.34 260.21 46.84 223.52

190

3. 63 kVA three phase distribution transformer


S.N Year Price

index of cement*

1 % column

(3)


and ferro alloys

15 %of column

(5)


products

84 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 1.64 244 36.6 166.3 139.69 177.93

2. 2005-06 186 1.86 225 33.75 171.4 143.98 179.59

3. 2006-07 210 2.10 260 39.0 179.0 150.36 191.56

4. 2007-08 221 2.21 348 52.20 187.9 157.84 212.25

5. 2008-09 226 2.26 284 42.60 203.1 170.60 215.46

Composite Price Index Number for 63 kVA three phase distribution transformer


S.N Year

Common price index


column (9) above

82% of column (3)


18% of item (5)

Composite price index for 63 kVA

three phase distribution transformer

(4) + (6) (1) (2) (3) (4) (5) (6) (7)

1. 2004-05 177.93 145.90 201.55 36.28 182.18

2. 2005-06 179.59 147.26 210.08 37.81 185.08

3. 2006-07 191.46 156.99 224.32 40.38 197.37

4. 2007-08 212.25 174.05 238.68 42.96 217.01

5. 2008-09 215.46 181.60 260.21 46.84 223.52

191

4. 100kVA three phase distribution transformer


S.N Year Price

index of cement*

1 % column

(3)


and ferro alloys

15 %of column

(5)


products

84 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 1.64 244 36.6 166.3 139.69 177.93

2. 2005-06 186 1.86 225 33.75 171.4 143.98 179.59

3. 2006-07 210 2.10 260 39.0 179.0 150.36 191.46

4. 2007-08 221 2.21 348 52.2 187.9 157.84 212.25

5. 2008-09 226 2.26 284 42.6 203.1 170.60 215.46

Composite Price Index number for 100 kVA three phase distribution transformer


S.N Year

Common price

index Nos. for


column (9) above

82% of column (3)


18% of item (5)

Composite price index for 100 kVA three phase distribution transformer

(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 177.93 145.90 201.55 36.28 182.18

2. 2005-06 179.59 147.26 210.08 37.81 185.07

3. 2006-07 191.46 157.00 224.32 40.38 197.37

4. 2007-08 212.25 174.05 238.68 42.96 217.01

5. 2008-09 215.46 145.24 260.21 46.84 223.52

192

5. 250 kVA three phase distribution transformer Common price index number for civil works, structure material and equipment.

S.N Year Price

index of cement*

2 % column

(3)


and ferro alloys

5 %of column

(5)


products

93 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 3.28 244 12.2 166.3 154.66 170.14

2. 2005-06 186 3.72 225 11.25 171.4 159.40 174.37

3. 2006-07 210 4.20 260 13.0 179.0 166.47 183.67

4. 2007-08 221 4.42 348 17.4 187.9 174.75 196.54

5. 2008-09 226 4.52 284 14.20 203.1 188.88 207.60



S.N Year

Common price

index Nos. for


column (9) above

85% of column (3)


15% of item (5)

Composite price index for 250 kVA three phase distribution transformer

(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 170.14 144.62 201.55 30.23 174.85

2. 2005-06 174.37 148.21 210.08 31.51 179.72

3. 2006-07 183.67 156.12 224.32 33.65 189.77

4. 2007-08 196.54 167.06 238.68 35.80 202.86

5. 2008-09 207.60 176.46 260.21 39.03 215.49

193

6. 400 kVA three phase distribution transformer Common price index number for civil works, structure material and equipment.

S.N Year Price

index of cement*

2 % column

(3)


and ferro alloys

4 %of column

(5)


products

94 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9) 1. 2004-05 164 3.28 244 9.76 166.3 156.32 169.36 2. 2005-06 186 3.72 225 9.00 171.4 161.12 173.84 3. 2006-07 210 4.20 260 10.40 179.0 168.26 182.86 4. 2007-08 221 4.42 348 13.92 187.9 176.63 194.97 5. 2008-09 226 4.52 284 11.36 203.1 190.91 206.79



S.N Year

Common price

index Nos. for


column (9) above

85% of column (3)

All India consumer price index (industrial

workers general)

15% of item (5)

Composite price index for 400 kVA three

phase distribution transformer

(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 169.36 143.96 201.55 30.23 174.15 2. 2005-06 173.84 147.76 210.08 31.51 179.27 3. 2006-07 182.86 155.43 224.32 33.65 189.08 4. 2007-08 194.97 165.72 238.68 35.80 201.53 5. 2008-09 206.79 175.77 260.21 39.03 214.80

From the above, it could be seen that the composite index numbers for the

transformer capacities from 15kVA to 100kVA vary marginally (less than 1%) and

hence it is reasonable to adopt the same composite index number for these

transformers as follows:

Composite price index number adopted for distribution transformer stations of

capacities 15 to 100kVA Year Composite index number

2004-05 182.50 2005-06 185.50 2006-07 197.50 2007-08 218 2008-09 224

For 250kVA and 400kVA transformer stations the composite index numbers are

almost the same and hence the following index numbers are adopted for both these

transformer stations.

194

Composite price index number adopted for distribution transformer stations of capacities 250 & 400kVA

Year Composite index number 2004-05 174.50 2005-06 179.50 2006-07 189.50 2007-08 202 2008-09 215

IV. 11kV lines

The cost components (as a percentage) for different components, for a 11kV line are

analysed as follows. For lines with RCC/PSCC poles

(%) I Cement 12 Ii Iron, steel and ferro alloys 28 iii Insulators, conductor etc (manufactured

products) 60



11kV lines Common price index number for civil works, structure material and equipment.

S.N Year Price

index of cement*

12 % column

(3)


and ferro alloys

28 %of column

(5)


products

60 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 19.68 244 68.32 166.3 99.78 187.78 2. 2005-06 186 22.32 225 63 171.4 102.84 188.16 3. 2006-07 210 25.2 260 72.8 179.0 107.4 205.4 4. 2007-08 221 26.52 348 97.44 187.9 112.74 236.7 5. 2008-09 226 27.12 284 79.52 203.1 121.86 228.5

Composite Price Index number for 11kV lines including labour, transport etc.

S.N Year

Common price index


column (9) above

72% of column (3)



28% of item (5)

Composite price index

for 11kV lines

(4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 187.78 135.20 201.55 56.43 191.64 2. 2005-06 188.16 135.48 210.08 58.82 194.30 3. 2006-07 205.4 147.89 224.32 63.49 210.70 4. 2007-08 236.7 170.42 238.68 66.83 237.25 5. 2008-09 228.5 164.52 260.21 72.89 237.38

195

V. LT Lines

The cost components (as a percentage) different for different components, for a LT

lines are analysed as follows. For lines with RCC/PSCC poles

(%) I Cement 13 Ii Iron, steel and ferro alloys 30 iii Insulators, conductor etc (manufactured

products) 57



LT Lines Common price index number for civil works, structure material and equipment.

S.N Year Price

index of cement*

13 % column

(3)

Price index of


alloys

30 %of column

(5)


products

57 %of column

(7)

Common price index

number (4) +(6) + (8)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

1. 2004-05 164 21.32 244 73.2 166.3 94.79 189.31

2. 2005-06 186 24.18 225 67.5 171.4 97.70 189.38

3. 2006-07 210 27.3 260 78 179.0 102.03 207.33

4. 2007-08 221 28.73 348 104.4 187.9 107.10 240.23

5. 2008-09 226 29.38 284 85.2 203.1 115.77 230.35

Composite Price Index number for LT lines including labour, transport etc.

S.N Year

Common price index


column (9) above

70% of column (3)


30% of item (5)

Composite price

index for LT lines (4) + (6)

(1) (2) (3) (4) (5) (6) (7)

1. 2004-05 189.31 132.52 201.55 60.47 192.98

2. 2005-06 189.38 132.57 210.08 63.02 195.59

3. 2006-07 207.33 145.13 224.32 67.30 212.43

4. 2007-08 240.23 168.16 238.68 71.60 239.77

5. 2008-09 230.35 161.25 260.21 78.06 239.31

Note: All the price index numbers taken from Economic Survey are with the base

1993 – 94 =100.

S.N SPDCL CPDCL TNEB MGVCL UGVCL WB Assam Bhopal Indoor UPCL

CESU SouthCo

PSEB Chattisgarh Acceptable

common range

Average of the

normative range

133kV line with 80/100mm² AAAC/ACSR over PSCC / RCC poles

2.52/2.62

2.57/2.69 2.138 - - 3.05

1.93/2.52

2.42/2.93 2.27 2.24

2.138/3.05 2.594

2 33kV line with 80/100mm² AAAC/ACSR over Rail poles - - - - - 3.852.94/4.13

3.55/4.53 - -

3.10/3.91

2.94/4.53 3.74

3 11kV line with 34/50mm² over PSCC supports1.351/1.627

1.33/1.67

1.327/1.394

1.130/1.383

1.130/1.383 2.06

1.06/1.36

1.34/1.67

1.26/1.54

1.039/1.386

0.86/1.44

0.96/1.26

1.039/1.67 1.355

415/16 KVA single phase distribution transformers 0.353 0.293 - - - - - - 0.62 -

0.293/0.62 0.46

516/25 KVA three phase distribution transformers - - - 0.741 0.741 0.73 0.67 0.74 1.06 0.93 0.63 0.66

0.63/1.06 0.85

663 KVA three phase distrribution transformes

1.35/1.432 0.94 0.664 0.925 0.925 1.00 1.02 1.12 1.42 1.02 0.82 1.01

0.664/1.432 1.05


1.54/1.737 1.12 0.99 1.22 1.22 1.19 1.11 1.61 1.173 0.95 1.43

0.95/1.737 1.34

8250 KVA three phase distrribution transformes - - 1.357 - - - - - - - 2.04

1.357/2.04 1.7

9400/500 KVA three phase distrribution transformes - - 2.341 - - - - - - - - 2.341 2.34

10LT 3 phase 5 wire / 4 wire 55mm² /34mm² AAAC / ACSR iover PSCC / RCC

1.18/1.857

1.25/1.88

1.084/1.476

1.109/1.367

1.109/1.367 2.23

0.97/1.71

1.34/2.18

1.44/1.72

1.42/1.63

0.78/1.30

1.18/1.77

0.97/2.18 1.58

11 LT single phase 3 wire 34mm² AAAC / ACSR iover PSCC / RCC 1.117 1.09 0.966 0.966 1.420.77/0.97

0.97/1.21 1.21 1.16 0.82

0.92/1.12

0.82/1.21 1.02

12 33/11 kV SS with 1x1.6 MVA PTR - - - 22.63 26.36 - - - 29.6922.63/29.69 26.16

33/11 kV SS with 1x2.5 MVA PTR - -

33/11 kV SS with 1x3.15 MVA PTR - - - 29.5 32.12 58.8 49.10 - 37.0437.04/

58.8 47.9

33/11 kV SS with 1x5 MVA PTR 71.00/77.00 66.85 - 49.76 55.42 79.20 62.20 48.66

48.66/79.2 63.93

33/11 kV SS with 1x8 MVA PTR (Out door) - - - - - - -

33/11 kV SS with 2x3.15 MVA PTR - - 153.00 - - 104.50 104.5 104.5

33/11 kV SS with 2x5 MVA PTR 116.00/122.00 116.60 - - -

116/122 119.00

33/11 kV SS with 2x6.3 MVA PTR - - 178.40 - - 178 178

33/11 kV SS with 2x8 MVA PTR (outdoor) - 142.2 - - 142.20 142.2033/11 kV SS with 2x8 MVA PTR (Indoor) - 204.13 204.13 204.1366/11kV SS with 1X8 MVA PTR66/11kV SS with 12.5/20 MVA PTR66/11kV SS with 2X20/25 MVA PTR

196

Annexure - 6.2 (a)

Arriving at the capital cost ranges for the year 2004-05


CESU SouthCo


common range

Average of the

normative range


2.52/2.62

2.57/2.70 2.764 3.36

2.12/2.76

2.02/2.43 2.30 2.57

2.30/3.36 2.83

2 33kV line with 80/100mm² AAAC/ACSR over Rail poles - 4.243.23/4.54

3.27/3.96 - -

3.46/4.38

3.23/4.54 3.89


1.36/1.77

1.407/1.478

1.130/1.542

1.130/1.542 2.07

1.17/1.49 1.38

1.287/1.646

1.055/1.48

0.88/1.48

1.06/1.37

1.06/2.07 1.57

415/16 KVA single phase distribution transformers 0.353

0.30/0.35 - - - 0.778 0.619 -

0.30/0.35 0.33

516/25 KVA three phase distribution transformers 0.438 0.741 0.741 0.75 0.79 0.70 0.75 1.432

0.882/0.94 0.70 0.77

0.70/0.94 0.82


1.35/1.432 1.277 0.713 0.925 0.925 1.04 1.1 1.05 1.867

1.374/1.432 0.97 1.17

0.713/1.432 1.07


1.54/1.737 1.4 1.147 1.22 1.22 1.63 1.42 - 2.298 1.667 1.18 1.7

1.147/1.737 1.44

8250 KVA three phase distrribution transformes - 1.753 - - -

3.782/3.895

3.44/3.55 2.25

1.753/3.895 2.83

9 400/500 KVA three phase distrribution transformes - 2.923 - - -6.168/6.281

5.61/5.72 -

2.923/6.281 4.6


1.318/1.857

1.34/1.85

1.141/1.558

1.270/1.440

1.270/1.440 2.47

1.06/1.87

1.05/1.80

1.592/2.426

1.384/2.353

0.83/1.34

1.29/1.92

1.27/2.35 1.81

11 LT single phase 3 wire 34mm² AAAC / ACSR iover PSCC / RCC 1.117 1.11 1.104 1.570.85/1.06

0.80/1.20 1.327 1.16 0.84

1.00/1.21

0.84/1.57 1.21

12 33/11 kV SS with 1x1.6 MVA PTR 23.30 27.14 32.7023.30/32.70 28

33/11 kV SS with 1x2.5 MVA PTR

33/11 kV SS with 1x3.15 MVA PTR 31.75 34.57 59.5 51.9 43.5343.53/

59.5 51.52

33/11 kV SS with 1x5 MVA PTR 71.00/77.00

59.40/62.10 55.20 61.48 83.20 65.30 56.88

55.20/83.20 69.2

33/11 kV SS with 1x8 MVA PTR (Outdoor) - - -

33/11 kV SS with 1x8 MVA PTR (Indoor) - -33/11 kV SS with 2x3.15 MVA PTR - 168.00 112.40 112.4 112.4

33/11 kV SS with 2x5 MVA PTR 116/122 125.60 116/ 125.6 120.8

33/11 kV SS with 2x6.3 MVA PTR 196.30 196.3 196.3

33/11 kV SS with 2x8 MVA PTR (outdoor) 160.50 190160.5/

190 175.25

33/11 kV SS with 2x8 MVA PTR (Indoor)204/

214.5204/

214.5 209.25

197

Annexure - 6.2 (b)Arriving at the capital cost ranges for the year 2005-06


CESU SouthCo


common range

Average of the

normtive range


2.52/2.62

2.46/2.71 3.508 3.67 4.69

2.12/2.76

2.12/2.55 2.93

2.33/2.98

2.46/3.67 3.065

2 33kV line with 80/100mm² AAAC/ACSR over Rail poles - 4.663.23/4.54

3.43/4.16 - -

3.67/4.66

3.23/4.66 3.95


1.53/1.95

1.936/2.058

1.425/1.754

1.455/1.832 2.10 2.40

1.45/1.58

1.45/1.96

1.57/1.64

1.426/1.704

0.96/1.48

1.18/1.55

1.351/2.058 1.71

415/16 KVA single phase distribution transformers 0.353

0.377/0.426 - - - - 0.637 -

0.353/0.426 0.39

516/25 KVA three phase distribution transformers 0.678 1.033 0.969 0.8 1.46 0.81 0.72 0.75 0.976 0.87 0.82

0.678/1.033 0.86


1.35/1.432 1.18 1.006 1.567 1.5 1.27 1.80 1.24 1.11 - 1.49 1.37 1.16

1.066/1.80 1.43


1.54/1.737 1.69 1.730 1.905 1.845 1.62 2.08 1.59 - 1.9 1.74 1.72 1.65

1.54/2.08 1.81

8250 KVA three phase distrribution transformes - 2.34 - - - - - - 2.28

2.28/2.34 2.31

9400/500 KVA three phase distrribution transformes - 2.923 - - - -

6.168/6.28

5.61/5.72 -

2.92/6.28 4.6


1.318/1.857

1.45/1.93

1.576/2.166

1.454/2.023

1.497/2.097 2.71 2.07

1.06/2.01

1.10/1.89

1.57/1.84

1.38/2.41

0.96/1.80

1.25/2.17

1.31/2.41 1.86

11 LT single phase 3 wire 34mm² AAAC / ACSR iover PSCC / RCC 1.117 1.25 1.24 1.295 1.62 1.490.85/1.00

0.87/1.07 1.54 1.23 0.84

1.08/1.33

0.84/1.62 1.23

12 33/11 kV SS with 1x1.6 MVA PTR 24.47 27.14 33.224.47/

33.2 28.8433/11 kV SS with 1x2.5 MVA PTR 131.2 - - - 131.2 131.2

33/11 kV SS with 1x3.15 MVA PTR 137 33.34 34.57 65.70 52.80 50.4450.44/65.70 58.07


78.2/81.2 57.96 61.48 64.82

57.96/81.2 69.58

33/11 kV SS with 1x8 MVA PTR (Outdoor) 108 108 108

33/11 kV SS with 1x8 MVA PTR (Indoor)

33/11 kV SS with 2x3.15 MVA PTR 181.08 116.90 116.90 116.90

33/11 kV SS with 2x5 MVA PTR 116.00/122.00 130.20

116/130.20 123.10


33/11 kV SS with 2x8 MVA PTR (Outdoor) 172.70 172.70 172.70

33/11 kV SS with 2x8 MVA PTR (Indoor)

198

Annexure-6.2 (c)Arriving at the capital cost ranges for the year 2006-07


CESU SouthCo PSEB Chattisgarh

Acceptable common

range

Average of the

normtive range


3.49/3.59

2.99/3.28 3.04 3.84 5.42

3.05/3.38

2.79/2.94

3.20/3.38

2.70/3.07 -

2.65/3.43

2.70/3.59 3.15

2 33kV line with 80/100mm² AAAC/ACSR over Rail poles - 5.18 - - - - -4.05/5.18

4.05/5.18 4.62


2.00/2.59

1.891/2.473

1.54/1.90

1.52/

1.94 2.21 2.78 2.38 1.951.54/2.18

1.55/1.99

1.76/2.30

1.37/2.16

1.37/2.38 1.88

415/16 KVA single phase distribution transformers 0.423 0.413 - - - 1.36 - - 0.898 0.82 - -

0.4/0.6 0.5

516/25 KVA three phase distribution transformers 0.84 - 1.083 1.136 0.86 1.69

1.11/1.21

1.04/1.09 1.01 1.62 1.16 0.96 1.16

0.84/1.45 1.15

663 KVA three phase distrribution transformes 1.328 1.193 1.012 1.644 1.735 1.32 2.1 1.54 1.45 1.45 2.07 1.55 1.22 1.65

1.20/2.0 1.6


1.583/1.963 1.686 1.88 2.087 2.121 1.7 2.42 1.85 1.94 2.1 2.39 2.04 1.66 2.31

1.60/2.10 1.85

8250 KVA three phase distrribution transformes - 3.064 - - - - - 4.84 - - - 3.49

3.0/3.49 3.25

9400/500 KVA three phase distrribution transformes - 5.952 - - - - - 7.04 - - - -

6.00/7.00 6.50

10LT 3 phase 5 wire / 4 wire 55mm² /34mm²AAAC / ACSR iover PSCC / RCC

1.581/2.196

1.69/2.41

1.62/2.19

1.49/2.09

1.514/2.38 2.73 2.39

1.98/2.41

1.85/2.42

1.84/1.98

1.64/2.18

1.53/2.18

1.42/2.56

1.42/2.7 2.06

11 LT single phase 3 wire 34mm² AAAC / ACSR iover PSCC / RCC 1.3431.14/1.37

1.113/1.369 1.278 1.402 1.65 1.32 - 1.68 1.2 1.13 0.98

1.23/1.54

1.10/1.40 1.3

12 33/11 kV SS with 1x1.6 MVA DTR 54.44 53.65 54.5253.65/54.52 54.04

33/11 kV SS with 1x2.5 MVA PTR - - - - -33/11 kV SS with 1x3.15 MVA PTR 153.95 77.21 77.04 82.78 67.50 51.60 81 77/83 80.3


87.39/93.0 100.88 106.5 95.51

79/106.50 92.75

33/11 kV SS with 1x8 MVA PTR (Outdoor) 137.181 170.53 137/170 153.533/11 kV SS with 1x8 MVA PTR (Indoor) 219.484 219.48 219.48

33/11 kV SS with 2x3.15 MVA PTR 182.40 110.21 123.76 122.20 110/124 117

33/11 kV SS with 2x5 MVA PTR 130.0/137.0 143.40

130/143.4 136.7


33/11 kV SS with 2x8 MVA PTR (Outdoor) 183.85183.85

184

33/11 kV SS with 2x8 MVA PTR (Indoor) - -66/11kV SS with 1X8 MVA PTR 196.52 196.52 196.5266/11kV SS with 12.5/20 MVA PTR 369 369 36966/11kV SS with 2X20/25 MVA PTR 1556.89 1556.89

199

Annexure - 6.2 (d)Arriving at the capital cost ranges for the year 2007-08


CESU SouthCo


common range

Average of the

normtive range


3.16/3.29

3.45/3.54 3.54 - -

3.83/4.38 6.42

3.38/3.77

2.76/3.06 -

3.71/3.93

2.74/3.22 -

2.75/3.90 3.325

2 33kV line with 80/100mm² AAAC/ACSR over Rail poles - - - - 5.7 - - - - - - -5.20/5.75 5.48


2.24/3.29

2.10/2.65

1.88/2.13

1.56/1.98

2.17/2.65 3.29 2.5 1.78 -

1.61/2.74

1.57/2.09

1.95/2.60 2.00/2.50 2.25

415/16 KVA single phase distribution transformers - 0.429 - - - - 1.61 - - - 0.953 0.64 -

0.4/0.6 0.5

516/25 KVA three phase distribution transformers - 0.978 - 1.287 1.136 1.31 2.05

1.32/1.45

1.09/1.33 1.15 1.73 1.15

0.92/1.09 1.0/1.4 1.2

663 KVA three phase distrribution transformes 1.579 1.518 - 1.74 1.34 1.51 2.39 1.88 1.75 1.65 2.78 1.48 1.30

1.6/2.00 1.8


1.811/1.834 1.715 1.97 2.23 2.12 1.94 2.56 2.47 2.35 2.39 2.55 2.24 1.84 1.9/2.2 2.05

8250 KVA three phase distrribution transformes - 3.208 - - - - - - 5.50 - - -

3.00/3.2 3.21

9400/500 KVA three phasedistrribution transformes - 5.948 - - - - - - 8.00 - - - 6.00/8.00 7.50


1.611/2.365

1.91/2.60

1.754/2.44

1.54/2.43

1.58/2.4 2.83 2.83

2.19/2.68

2.08/2.53 -

1.90/2.45

1.66/2.19

1.61/2.3

2.0/2.4 2.2

11 LT single phase 3 wire 34mm² AAAC / ACSR iover PSCC / RCC 1.371.33/1.46

1.204/1.480 1.281 1.415 2.38 2.04 - 1.77 - 1.3 1.14 1.06

1.2/1.8 1.5

12 33/11 kV SS with 1x1.6 MVA PTR 54.74 55.7254/55 54.5

33/11 kV SS with 1x2.5 MVA PTR - - - -

33/11 kV SS with 1x3.15 MVA PTR 180.00 78.21 77.04 83.5 54.3 77/84 80.5

33/11 kV SS with 1x5 MVA PTR 85.0/93.0 100 90.88 98.77

85/100 92.75

33/11 kV SS with 1x8 MVA PTR (Outdoor) 134.35 180.50 140/180 160

33/11 kV SS with 1x8 MVA PTR (Indoor) 220/240 230

33/11 kV SS with 2x3.15 MVA PTR 180.64/282.26 - 126.4

110/130 120

33/11 kV SS with 2x5 MVA PTR 156.65 135/155 14533/11 kV SS with 2x6.3 MVA PTR 252.00 252.00 252.0033/11 kV SS with 2x8 MVA PTR (Outdoor) 243.06 185/240 212.533/11 kV SS with 2x8 MVA PTR (Indoor) 310/400 35566/11kV SS with 1X8 MVA PTR 202.2 202.20 202.20

66/11kV SS with 12.5/20 MVA PTR308.58/

369308.58/

369 338.7966/11kV SS with 2X20/25 MVA PTR 1350 1350

200

Annexure - 6.2 (e)Arriving at the capital cost ranges for the year 2008-09

S.No

Elements in Distribution Business 2004-05 2005-06 2006-07 2007-08 2008-09

a 33 kV line / KM1 with 80/100 mm2 AAAC/ACSR over PSCC/RCC supports (a8&b8) 2.59 2.83 3.07 3.15 3.33

2 with 80/100 mm2 AAAC/ACSR over rail poles (a9 & b9) 3.74 3.89 3.95 4.62 5.48b 11 kV lines3 11 kV line with 34/50 mm2 AAAC / ACSR over PSCC / RCC

supports1.36 1.57 1.71 1.88 2.25

c Distribution transformer stations4 15/16 kVA single phase (a10&b10) 0.46 0.33 0.39 0.50 0.505 16/25 kVA Three phase (a11&b11) 0.85 0.82 0.86 1.15 1.206 63 kVA three phase (a12&b12) 1.05 1.07 1.43 1.60 1.807 100 kVA three phase (a13&b13) 1.34 1.44 1.81 1.85 2.058 250 kVA three phase (a14&b14) 1.70 2.83 2.31 3.25 3.109 400/500 kVA three phase (a15 &b15) 2.34 4.60 4.60 6.50 7.50d LT Lines10 Three phase 5 wire and 4 wire with 55 mm2 / 34 mm2 AAAC /

ACSR over PSCC / RCC supports (a16&b16)1.58 1.81 1.86 2.06 2.20

11 Single phase 3 wire with 34 mm2 AAAC / ACSR over PSCC / RCC supports (a17&b17)

1.02 1.21 1.23 1.30 1.50

e 33/11 kV Sub-stations12 33/11 kV SS with 1x1.6 MVA power transformer 26.16 28.00 28.84 54.04 54.5013 33/11 kV SS with 1x3.15 MVA power transformer 47.92 51.52 58.07 80.30 80.5014 33/11 kV SS with 1x5 MVA power transformer 63.93 69.20 69.58 92.75 92.75

15 33/11 kV SS with 1x8 MVA power transformer (outdoor) - - 108.00 153.50 160.00

16 33/11 kV SS with 1x8 MVA power transformer (indoor) - - - 219.48 230.00

17 33/11 kV SS with 2x3.15 MVA power transformer 104.50 112.40 116.90 117.00 120.0018 33/11 kV SS with 2x5 MVA power transformer 119.00 120.80 123.10 136.70 145.0019 33/11 kV SS with 2x8 MVA power transformer (outdoor) 142.20 175.25 172.00 184.00 212.50

20 33/11 kV SS with 2x8 MVA power transformer(indoor) 204.13 209.25 - - -

201

Annexure - 6.2 (f)Year wise Benchmark Capital Costs from 2004-05 to 2008-09

Elements in Distribution Business Value of 'a' Value of 'b' Benchmark cost of element

during the year

2008-09

Benchmark cost of element

during the year

2009-10


during the year

2010-11


during the year

2011-12


during the year

2012-13


during the year

2013-14


during the year

2014-15

yc=a+bx yc=a+bx yc=a+bx yc=a+bx yc=a+bx yc=a+bx yc=a+bxa 33 kV line / KM1 with 80/100 mm2 AAAC/ACSR over PSCC/RCC

supports (a8&b8)0.2649 0.0131 3.3031 3.4719 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!

2 with 80/100 mm2 AAAC/ACSR over rail poles (a9 & b9)

-0.6469 0.0219 4.8046 5.0804 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!

b 11 kV lines3 11 kV line with 34/50 mm2 AAAC / ACSR over

PSCC / RCC supports-1.1705 0.0136 2.0697 2.2478 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!

c Distribution transformer stations4 15/16 kVA single phase (a10&b10) -0.1236 0.0028 0.4985 0.5312 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!5 16/25 kVA Three phase (a11&b11) -0.9177 0.0094 1.1875 1.2981 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!6 63 kVA three phase (a12&b12) -2.0518 0.0171 1.7743 1.9754 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!7 100 kVA three phase (a13&b13) -1.2870 0.0148 2.0313 2.2057 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!8 250 kVA three phase (a14&b14) -2.8887 0.0288 3.2968 3.6283 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!9 400/500 kVA three phase (a15 &b15) -16.7666 0.1139 7.7156 9.0274 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!d LT Lines

10 Three phase 5 wire and 4 wire with 55 mm2 / 34 mm2 AAAC / ACSR over PSCC / RCC supports (a16&b16)


11 Single phase 3 wire with 34 mm2 AAAC / ACSR over PSCC / RCC supports (a17&b17)


e 33/11 kV Sub-stations12 33/11 kV SS with 1x1.6 MVA power transformer -116.7080 0.7825 56.2276 65.4612 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!13 33/11 kV SS with 1x3.15 MVA power transformer -108.4042 0.8686 83.5525 93.8018 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!14 33/11 kV SS with 1x5 MVA power transformer -71.8930 0.7548 94.9280 103.8351 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!15 33/11 kV SS with 2x3.15 MVA power transformer 55.8739 0.2942 120.8978 124.3696 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!16 33/11 kV SS with 2x5 MVA power transformer 3.9318 0.6309 143.3684 150.8134 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!

17 33/11 kV SS with 2x8 MVA power transformer (outdoor)


Year 33 kV line with 80/100 mm2

AAA

33 kV Line Over Rail Poles

11 kV Lines Distribution Transformer 15 kVA to 100 kVA

Distribution Transformer 250/400 kVA

LT Lines 33 kV / 11 kV Sub-station

2008-09 232.39 249.3 237.38 224 215 239.31 2212009-10 245.3 261.91 250.43 235.77 226.52 252.54 232.82010-11 x3 x3 x3 x3 x3 x3 x32011-12 x4 x4 x4 x4 x4 x4 x42012-13 x5 x5 x5 x5 x5 x5 x52013-14 x6 x6 x6 x6 x6 x6 x62014-15 x7 x7 x7 x7 x7 x7 x7

202

Annexure -6.3Model for arriving at Benchmark Capital cost of different elements of Distribution Business correlating to composite price index numbers

Values of the constants 'a' and 'b' of different elements as per Regression formula

203

7. Summary, Conclusions and Suggestions/ Recommendations

7.1 The capital costs of various elements in the Distribution Business – 33 kV, 11 kV and

LT lines (Overhead and underground), 33/11 kV substations (outdoor and indoor),

66kV (in three cases), distribution transformer stations, metering equipment and

meters and service line costs as obtained / collected from the identified utilities and

validated wherever required are discussed in Chapters-4 and 5.

As discussed in Chapters-4 and 5 the costs as executed are not available in

complete shape in a number of cases and the costs have to be validated by adding

the costs of some items not accounted by the utility and the costs obtained /

validated are presented to arrive at benchmark costs.

7.2 Unlike benchmarking as an instrument for improving the operational

performance, the benchmarking the capital costs of elements in Distribution Business is rather difficult as the costs differ for various reasons as detailed below:

• Different utilities adopt different practices / norms for the lines and substations,

which contribute for variation in costs as discussed in Chapters 4 and 5.

• In some cases the land costs for substations are high.

• The costs as executed are not available in complete shape as the costs of all

items are not accounted.

• A scheme may contain a number of elements and segregation of costs for

specific items is difficult.

• The costs to some extent depend on equipment specifications etc., which may

differ from utility to utility.

In view of the above, it is difficult to benchmark the costs of various elements in

Distribution Business to a specific cost. However, with the data available an attempt

is made to benchmark the capital costs of various elements in Distribution Business

204

with a range of benchmark costs. Where the costs are abnormally high in some

utilities due to local conditions and practices followed by the utilities, the costs are not

considered for the benchmarking and they have to be considered as state specific

costs. The variation in practices/norms and correspondingly the costs are more

significant in the case of 33 kV, 11 kV and LT lines. The practices / norms commonly

adopted by most of the utilities are considered for benchmarking the costs.

Wherever lines are constructed with higher size conductor or special supports etc.,

for specific use, these could be brought to the notice of the appropriate Commission

while giving costs in the ARR petition.

Summarising the benchmark costs for various elements in Distribution Business

executed during 2008-09 could be concluded as below:

(i) 33 kV, 11 kV and LT Lines (Cost / km)

(a) Overhead Line

- 33 kV - Rs.3.00 to Rs.3.60 lakhs

- 11 kV - Rs.2.00 to Rs.2.5 lakhs

- LT - Rs.2.00 to Rs.2.40 lakhs

(b) Underground System (Cost / km) - 33 kV - Rs.25 to Rs.40 lakhs

- 11 kV - Rs.8 to Rs.20 lakhs

- LT - (i) 3 ½ x 95 mm2 and

3 ½ x120mm2 XLPE cable = Rs.4 to Rs. 5 lakhs

(ii) 3 ½ x 300 mm2 XLPE cable = Rs.11 to Rs. 12 lakhs (specific to Delhi)

(ii) 33 / 11 kV substations (Receiving stations) (outdoor) with the transformer capacities of - (Cost / each SS)

- 1x 1.6 MVA - Rs.54 to Rs.55 lakhs

- 1x3.15 MVA - Rs.77 to Rs.84 lakhs

- 1x5 MVA - Rs.85 to Rs.100 lakhs


- 2x3.15 MVA - Rs.110 to Rs. 125 lakhs


- 2x8 MVA - Rs.185 to Rs.240 lakhs - 2x6.3 MVA - Rs.190 to Rs.260 lakhs (Specific to WBSDCL)

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(iii) 66 kV Substation (Outdoor) - (Cost / each)

- 1x8 MVA – Rs.195 to 200 lakhs

- 1x12.5 MVA – Rs.305 to 310 lakhs

- 1x20 MVA – Rs.370 lakhs

(iv) 33/11 kV Substations (Indoor) – (Cost / each SS)

- 2x5 MVA - Rs. 235 to 240 lakhs



(v) Distribution Transformer Stations (Cost / each)

- 15/16 kVA single phase - Rs.0.40 to Rs.0.60 lakhs

- 16/25 kVA Three phase - Rs.1.00 to Rs.1.40 lakhs

- 63 kVA Three phase - Rs.1.60 to Rs.2.00 lakhs




(vi) Metering Equipment and Meters - 33 kV metering - Rs.45,000 to Rs.60,000

- 11 kV metering - Rs.32,000 to Rs.43,000

- Trivector metering - Rs.3,800 to Rs.4000

- LT – Three phase - Rs.1,300 to Rs.1,800

- Single phase - Rs.450 to Rs.900

(vii) Service Line Costs (LT)

Sl.No. Category of Service Costs (Rs.)

1 Single phase domestic and non-domestic Rs. 1800 to 3000

2 Three phase domestic and non-domestic Rs. 5000 to 7000

3 Three phase industrial

i) upto 20 HP Rs. 5000 to 9000

ii) Above 20 HP Rs. 9500 to 18000

4 Street Lights Rs. 1600 to 2600

5 Agriculture Rs. 3000 to 5000

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(viii) Overheads

33/11 kV Sub-stations 18% of the total costs

Distribution Transformer Stations 15% of the total cost

33 kV and 11 kV lines 28% of total cost

LT Lines 30% of total cost

Service connections (LT) 25% of total cost

7.3 The benchmark costs for hilly areas can be considered as follows:

1. 33kV line

a) Assam

(i) 80mm2 AAAC on PSCC poles 100M

Span & 80mm2 AAAC on steel tubular poles, DPs, 100 meter span

Rs. 9 to 11.00 lakhs

(ii) 8 mm2 AAAC on PSCC poles 100 meter span

Rs. 5.5 to 6.4 lakhs

b) Uttarakhand

(i) 100mm2 ACSR on steel tubular poles,

60 meter span with ground wire. Rs. 9 to 12.00 lakhs

2. 11kV line

(i) Assam & UPCL – Rs. 4.00 to 5.00 lakhs

3. LT lines

(i) Assam & UPCL

(ii) 80 mm2 AAAC on ST poles 40 meter span = Rs. 5.5 to 6.40 lakhs

(iii) 20/25 mm2 AAAC on ST poles / RSJ with 50 meter span = Rs. 3.50 to 4.00

lakhs

(iv) 20/25 mm2 AAAC on PSCC poles with 50 meter span = Rs. 2.00 to 3.20

lakhs

4. 33/11kV substation (outdoor)

(i) 1X2.5 MVA Rs. 144 to 168 lakhs (ii) 1X3.15 MVA Rs. 170 to 180 lakhs (iii) 2X2.5 MVA Rs. 160 to 196 lakhs (iv) 2X5 MVA Rs. 250 to 274 lakhs

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5. Distribution transformers

(i) 15/16 KVA single phase transformers Rs. 1.36 to 1.61 lakhs (ii) 16/25 KVA three phase transformers Rs. 1.69 to Rs. 2.00 lakhs (iii) 63 KVA three phase transformers Rs. 2.00 to Rs. 2.42 lakhs (iv) 100 KVA three phase transformers Rs. 2.42 to 2.56 lakhs (v) 315/400 KVA three phase transformers Rs. 7.00 to 8.00 lakhs

Suggestions/Recommendations:

• The benchmark costs will serve as broad indicators and assist in decision making

by Regulatory Commissions while approving capital costs.

• In the case of 33 kV, 11 kV and LT lines utilities adopt different sizes of conductor

and types of supports. This might have been adopted by the utilities based on

the requirements. Based on the costs furnished the utilities shall try to economise

the costs.

• The costs of 33/11kV substations vary considerably in the layouts etc., type of

structures, control rooms and other related civil works, etc. Since the utilities are

constructing large number of substations is rural areas under RGGVY and other

schemes, it is desirable the layouts are simplified and the costs reduced.

• The distribution transformer capacities are standardised in most of the utilities to

15/16 kVA single phase, 25 kVA, 63 kVA and 100 kVA. It may not be desirable

to go in for large capacity distribution transformers unless they have to cater

highly concentrated loads / load density is high. Installation of smaller capacity

transformers reduces LT line lengths and losses thereby improving the voltages.

• Standard layouts and estimates with bill of material for some of the important

elements are given in the Annexures 5.1 to 5.6 for reference.

• The model given for updating the benchmark costs may be updated after 3-5

years as there may be changes in technology that impact on actual capital costs,

and changes in the weigtages of the composite price indices. If the base of the

price indices shifts, appropriate adjustments would need to be made.

• The continuous ground wire has to be run for overhead lines as per Rule 90 of IE

Rules 1956. It is not being followed in many of the utilities other than

Uttarakhand. It is to be ensured that the ground wire has to be run in all the

utilities unless it is relaxed by the electrical inspector under Rule 134 (1) of IE

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Rules 1956. The additional cost due to this will not change the range of the

benchmark costs.

• The utilities have not purchased energy efficient, star labelled transformers so far.

Certain utilities are proposing to purchase energy efficient star rated power

transformer and distribution transformers. Our enquiries reveal that the costs of

such transformers are around 10% more than the normal transformers. The

respective Regulatory Commissions may allow about 10% weightage in the cost

of transformers, wherever such transformers are purchased by the utilities.

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Capital Cost Banchmarks

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