ETA ENG1NEERINGi IsRIVATE LlMlf ED 503-504, Prakash Deep Building, 7, Tolstoy Marg, New Delhi - 110001 Ph. : 01 1-26451 115/6/7/8,43743800,4 1520840143 Fax : 011-43743866,41520844 Email : etametro@vsnl.net

Ref: ETA11 CML/SMW/BC/SC/KW080 Date: August 16, 201 1

BGM-BUSINESS DEVELOPMENT (POWER) M/S CESC LIMITED CESC House Chowringhee Square Kolkata - 700001 West Bengal

MIND ATTN: MR ADRlT PALCHOUDHURY

SUB: ICML, 9MWp SOLAR POWER PROJECT AT PRATAPGARH, DIST. KUTCH, GUJ4RAT - SUBMISSION OF DOCUMENTS FOR 66 KV S\MITCH YARD and MAIM CONTROL ROOM.

Dear Sir,

This is in reference to the subject project. We are pleased to attach herewith drawing and documents for the following :

We hope the above is in line with your requirements and would request you to kindly let us have your kind approval for the same to enable us to proceed further in the interest cf the project.

of the Documents & Calculation of Battery Charger

. - - - - . - -

Thanking you and assuring you of our best services at all times.

Rev No. 00 00

Yours fahhfully,

S A U R ~ B H CHAUHAN GENERAL MANAGER Encl: as above

Regd. Office : 5, Moores Road, Chennai - 600 006 Tamil Nadu, India

Branches (Tel.) - Bangalore : 41802300, Chennai : 38297626, Hyderabad : 27'763529130, Mumbai : 67742700, Pune : 26051310, Kolkata : 24864329

DOCUMENT SURMISSION

TRANSMITTAL FORM

m - - 1 n I s u r : m r c t E < T . r r l WTinin

Li.. . if C'R

PROJECT : 9MWp GRID INTERACTIVE SOLAR PV POWER PROJECT

CUSTOMER : INTEGRATED COAL MINING LIMITED - GUJARAT

CONTRACTOR : ETA ENGlNEERllNG PVT LTD

Submission Phase:

DRAWINGS / DOCUMENT

VENDOR & TECHNICAI, SUBMITTAL

CONSTRUCTION DOC1 JMENTS

f7 REPORTS

RECORDS

Submission Number: First Second Third Fourth Submission Contents:

Description of the Document

SPECIFICATION & CALCULATION O F BATTERY CHARGER TVM SPE('IFICAT1ON

System Description

MAIN CONTROL UNIT

66 KV SWITCH YARD

Rev No

00

00

For Information For Approval As Built

ETA:

Prepared By

Nisheeth

Reviewed By

Kapil

Checked By

Ankita

Approved By

SjyurAbh Char~han

ICML:

Sign

Approved By

Date 16-Aug-2011

Designation

110 V Battery

1. SCOPE:

This specification covers the technical requirements of design, manufacture, test at manufacturer's works, packing & forwarding, supply & erection of material complete with all accessories for efficient and trouble free operation. The specific requirements are covered in the enclosed technical data sheet.

Battery Rating Shall be rated as 150AH at 110 VDC.

2. The bidder shall provide all necessary requirements for Control & Monitoring of this equipment to ensure complete compatibility with SCADA & Substation Automation as asked for in this specification

3. APPLICABLE STANDARDS:

The material covered by this specification shall unless otherwise stated be designed, constructed and tested in accordance with latest revisions of relevant Indian Standard and shall conform to the regulations of local statutory authorities.

IS: 266 - Battery grade sulphuric acid. IS:1146 - Rubber and plastic container for lead acid storage batteries. IS:1069 - Water for storage batteries IS3694 - PVC insulated cables IS:1651-Stationary cells and batteries lead acid type (with tubular positive plates) IS:1652 - Stationary cells and batteries lead acid type (with plante positive plates) lS:9224 - Low voltage fuses IS:3116 - Sealing compound for lead acid batteries. lS:4540 - Semiconductor rectifier assemblies and equipment, mono-crystalline. IS33895 - Semiconductor rectifier cells and stacks mono-crystalline. IS:6071 - Synthetic separators for lead acid batteries lS:8320 - General requirements and methods of tests for lead acid storage batteries.

In case of any conflict between the standards and this specification, this specification shall govern.

4. GENERAL TECHNICAL REQUIREMENTS:

a. Each battery shall be of high rate performance lead acid type of capacity as specified in data sheet to provide normal and emergency DC loads. The battery shall consist of series connected cells for a nominal battery rating specified in data sheet.

b. BATTERY LAYOUT

Unless otherwise specified the battery shall be complete with battery racks and mounted in two row and single tier arrangement as specified. Bidder shall furnish dimensional drawings of the battery layout.

c. ACCESSORIES

The battery shall be complete with accessories and devices, including but not limited to the following:

i) Battery racks ii) Porcelain insulators, rubber pads etc. iii) Set of intercell, inter-tier and inter-bank connectors as required for the complete installation. iv) Electrolyte for first filling with 10% extra quantity (non returnable container). v) Accessories for testing and maintenance.

a) One - DC voltmeter (-3, 0, + 3 volts) with suitable leads for measuring cell voltage.

b) One - Hydrometer for measuring specific gravity of electrolyte in steps of 0.005. c) One - Filler hole thermometer fitted with plug and cap and having specific gravity

correction scale. d) Three - Pocket thermometers

e) Two - Acid resisting funnels f)Two - Acid resisting jugs of adequate capacity g) Two - Rubber aprons h) Two set - Fubber gloves i) Two - Cell lifting straps ij one set - Terminals and cable boxes with glands for connecting cable as required.

Spare connectors Spare vent plugs Spare nuts and bolts Suitable set of spanners PVC spill trays under the battery cells.

5. GENERAL CONSTRUCTIONS:

a) Cell Elements:

The cell shall be lead acid type with plate type as called for in data sheet. The plates shall be designed for maximum durability conditions including high rate of discharge and rapid fluctuation of load. In case of tubular positive plates, porous, acid resistant and oxidation resistant tubes shall be inserted one over each spine. After insertion the tubes shall be adequately filled and packed with active material before their lower ends are closed by a

common bar. Negative plates shall be of box type or pasted type. Pasted plates shall be so designed as to hold the active material securely in place and form contact with grid during service. The insulation between the plates shall provide correct spacing and complete separation between the plates of opposite polarity to prevent internal short-circuits and permit free circulation of electrolyte under all conditions.

The electrolyte shall be of battery grade sulphuric acid conforming to latest editions of relevant standards. The battery shall be shipped uncharged with the electrolyte. Electrolyte for first filling shall be supplied with 10% extra in non-returnable containers.

Water for storage batteries conforming to relevant standards shall be used in the preparation of the electrolyte and also to bring the level of electrolyte to approximately correct height during operationltesting.

c) Containers:

The cell element and electrolyte shall be assembled in heat resistant, shock absorbing, transparent, leak proof plastic containers, The cell plates shall be suspended without touching the bottom of the container. It shall provide sufficient sediment space so that the plates can shed their active material without shorting the plates in the cell during the expected life of the battery without cell cleaning.

The covers shall be furnished with acid spray proof vent plugs. The cell post polarity shall be marked on the cover. The electrolyte level lines for upper and lower limits shall be marked on all four sides of each containers.

d) Terminal Posts and Connectors:

The cell terminal posts and the inter-cell, inter-row, inter-rack, inter-step, inter-tier and end cell connectors shall be of lead or lead coated copper, copper connectors with adequate current carrying capacity. All connectors shall be furnished with acid resisting bolts and nuts with insulating covers. Terminal post shall be designed to accommodate external bolted connection conveniently. The junction between terminal posts and cover, and between cover and container shall be so sealed as to prevent any seepage of electrolyte.

e) Separators

The battery separator, when used, shall maintain the electrical insulation between the plates and shall allow the electrolyte to permeate freely. The separators shall be of wood or other acid resisting materials. Wooden separators, if used, shall be of cedar or other suitable timber, free from knots, cracks or other imperfections, smooth on the face and edges and chemically treated.

f) Stand:

The cells shall be supported on porcelain insulated rack fixed with pads and with adequate clearance between the adjacent cells.

g) Battery racks

The battery racks shall be constituted of best quality, seasoned teak wood, with atleast three (3) coating of anti acid paint of approved shade. Racks shall be rigid, free standing, mounted on porcelain insulators. Numbering tags for each cell shall be attached on the racks. Provision fgr clamping the outgoing cable shall be provided on the racks.

6. NAME PLATE AND MARKING:-

Material shall be provided with a nameplate containing following information.

a) Name of manufacturer. b) Order reference. c) Rated voltage-KV d) Rated normal current in Amps. e) Rated one second short-time current in Amps. f) Year & Month of Manufacture. h) Code number of the material

7. Tests: a) All tests shall be conducted as per the relevant standards. Tests shall comprise of:

i) Type Tests

ii) RoutinelAcceptance tests

All tests shall be witnessed by the Purchaser's representative.

Details of tests to be performed are given below :

b) Type Tests

Type tests shall comprise of the following:

i) Visual inspection ii) Dimensional check iii) Capacity test iv) Retention of charge test

c) Type tests shall be conducted on a minimum of one sample cell typical and identical with the cells forming the complete battery offered. However, the test cell shall not be one of the cells of the battery bank to be supplied. The bidder shall furnish copies of type test reports for all the tests along with the bid.

d) RoutinelAcceptance tests

i) Visual inspection ii) Dimensional check iii) Capacity test

e) Test Certificates

Copies of routinelacceptance test certificates shall be produced with the endorsement of the inspecting authority to the purchaser before effecting dispatch.

8. Spare Parts:

Bidder shall include the following items in the recommended list of spares along with itemwise unit prices:

i) Intercell connectors ii) Battery stands insulators and cell insulators iii) Nuts, bolts, washers etc. iv) Vent plugs cum level indicators v) Complete set of spare cell without electrolyte vi) Battery interrow connector vi) Battery intercell connector

9. Maintenance Spares:

The bidder shall submit a recommended list for maintenance spares for 5 years of smooth and trouble free operation along with item wise price.

Section C 110 V Battery Charger & DCDB

1. SCOPE:

This specification covers the technical requirements of design, manufacture, test at manufacturer's works, packing & forwarding, supply and Erection of material complete with all accessories for efficient and trouble free operation.

The bidder shall provide all necessary requirements for Control & Monitoring of this equipment to ensure complete compatibility with SCADA & Substation Automation as asked for in this specification

2 APPLICABLE STANDARDS:

The material covered by this specification shall unless otherwise stated be designed, constructed and tested in accordance with latest revisions of relevant Indian Standard and shall conform to the regulations of local statutory authorities.

3. GENERAL TECHNICAL REQUIREMENTS:

Each set comprising of a Float charger, Float cum Boost charger, common components & DC Distribution Board.

A. FLOAT CHARGER

Intended to operate off a three phase four wire AC supply of 415 volts, +I- 10% 50 Hz and suitable for floating 54 cells at 2.25V per cell and capable of supplying a DC continuous load of 20 Amps in a maximum ambient temperature of 50 Deg. C. The DC output supply voltage of the float charger shall be stabilised within +/-I% for AC input supply voltage variation of +/-lo% from 415 volts frequency variation of +I-5% from 50 Hz and simultaneous load variation of 0-100%. The AC ripple content in the DC output voltage of the float charger shall not be more than 2% without battery connected.

B. FLOAT CUM BOOST CHARGER

' Intended to operate off a Three phase, four wire AC supply of 415 Volts, +I- 10% 50 Hz, +I-5% and suitab!e for 54 cells and capable of the following two modes of operation:-

(i) CONSTANT CURRENT MODE: In the constant Current mode, the charger is capable of Boost charging the Batteries at any Constant Current settable from 25% to 100% of 40 Amps and the set Constant Current shall remain stabilized within +I- 2% of the set current for AC Input supply voltage variation of +/-lo% from 415 Volts and frequency variation of +I-5% from 50 Hz. The DC output voltage range of 2.0 V to 2.75 V per cell required for Boost charging shall be automatically selected by the charger in this Constant Current Mode.

(ii) CONSTANT VOLTAGE MODE: In the Constant Voltage Mode, the charger takes the place of the Float charger, thus the charger acting as Stand-by Float charger in place of the actual float charger that might have gone defective. The charger, in the Constant Voltage Mode, floats the battery at 2.25V per cell with a voltage stabilisation of +/-I% and feeds the DC continuous load of 20 Amps exactly in the same manner as the actual Float charger.

In either modes the AC ripple content in the DC output of Float Cum Boost Charger shall be limited to 2% without battery connected

quirements

The battery charger shall be capable of continuous independent operation to supply DC power at rated voltage as specified in the data sheet for fixed and impulse loads and to float and equalise charge the associated battery. The battery charger shall be with separate float and boost chargers.

Automatic constant voltage regulation unit with Auto1 manual control switch shall be provided to maintain the float charger DC output voltage with one (1) percent of the net value from no load to full load with the tolerance of incoming supply voltage and frequency.

Manual control knobs for coarse and fine voltage variation shall be provided. The float charge controller shall have built in load limiting features.

Static type three phase full wave bridge rectifier complete with ripple limiting features limiting ripples to three (3) percent shall be provided to get a smooth DC output.

When the battery is being charged through boost charger, float charger shall be prevented to feed the battery tap off point by means of a blocking diode. Blocking diode shall be provided to prevent reverse power feed from battery to charger circuits.

The charger shall be provided with fuse monitoring devices with alarm contacts on both DC and AC sides.

Service rectifier, trickle charger and boost charger shall have one ammeter, parallel to the shunt and one voltlneter across load at output terminals along with the selector switches. Incoming of the battery charger shall have AC electro magnetically operated ammeter through CT and voltmeter with selection switches. The size of the meters shall be 96 mm x 96 mm, flush mounted with 90" scale readings.

1 No. DC under voltage relay, 1 No. over voltage relay and 1 No. earth leakage relay shall be provided in the charger along with alarm facilities.

There shall be provision for manual control, if automode fails.

i. The load limiting feature of the float charger should be designed for adequate short time overload to take care of the starting of the DC motorltesting of lamps etc.

j. The boost charge voltage and current settings shall be adjustable between 70 to 100% of maximum boost charge voltage and between 30 to 100% of maximum boost charging current.

k. During boost charging following emergency measures shall be provided

I . If the AC mains supply fails, an arrangement shall be made to automatically connect the battery directly across the load.

5. CONSTRUCTION:

a) The charger panel shall be sheet steel construction of not less than 3.0 mm thickness with a swinging front panel with latch and concealed hinges. Adequate ventilating grills or louvers shall be provided.

b) The instruments, switches and indicating lamps shall be flush mounted on the front panel. Name plates for all equipment shall be provided. The panel shall be complete with internal wiring, terminal blocks, space heater with thermostatically controlled switch, panel illumination lamp and other auxiliaries.

c) Boost and float chargers when they are separate, shall be compartmentalized.

d) Ground terminal with isolating links shall be provided.

e) Cable glands shall be provided to suit the purchaser's incoming and outgoing cables.

f) All printed circuit cards shall be plug-in type, interlocked to prevent insertion in a wrong slot. Each card shall have LED indication on its front plate to indicate normal condition and readily accessible and marked test pins.

6. BATTERY CHARGER TEST

RoutineIAcceptance tests

i) No load test. ii) Insulation resistance test iii) High voltage test

In addition to the above the following tests shall be conducted on the battery charger Two sets of test certificates shall be included for these along with the bid.

i) Load test ii) Temperature rise test iii) Operation test

a) Alarm Annunciation circuit ON MU1000CI equivalent in respect of following fault condition: One No. i. AC under voltagelover voltage ii. Float charger AC MCCB trip. iii. Float cum Boost Charger AC MCCB trip iv. Float Charger SCR fuse blown v. Float cum Boost Charger SCR fuse blown vi. Float Charger filter condensor fuse blown vii. Float cum Boost Charger filter condensor fuse blown viii. Float Charger DC MCCB trip ix. Float cum Boost Charger DCMCCB Trip x. Float Charger DC under voltage xi. Float cum boost DC under voltage xii. Float Charger DC overvoltage xiii. Float cum boost Charger DC overvoltage xiv. Battery DC under voltage xv. Battery DC over voltage xvi. DC supply earth fault.

I Battery sizinq Calculation-1 10 V I

VRLA IEEE-485 5 Deg. C

1.25 1.15 1.289 10% -1 0%

1 Purpose: ICML SOLAR PLANT SWITCHYARD shall have 110 V Battery bank (VRLA) with battery Charger to cater to the contineous DC Load, Emergency & Momentary load associated with 6611 1 KV Substation -Present & Future

2 Design Criteria

2.1 Type of Battery 2.2 Basis of Sizing 2.3 Lowest Temperature 2.4 Aging Factor 2.5 Design Margin 2.6 Temperature Correction Factor 2.7 Max System Voltage 2.8 Min System Voltage

3 Battery Chargers

3.1 Float Cum Boost Chargers will be provided for each battery , Float Charger will be designed to feed continuous DC Load in the system & Keeping the battery on Float Charge.

3.2 Boost Charger will be sized for Boost charging the Batteries ( Discharged in 10 Hours)

Battery sizing Calculation-1 10 V

4 Calculation of Number of Cells

4.1 Nominal System Voltage Volts 110 4.2 Maximum System Voltage Volts 121 4.3 Minimum System Voltage Volts 99 4.4 Nominal Voltage of each cell Volts 2 4.5 Cell End Voltage Volts 1.85 4.6 Float Charging Voltage Volts 2.25

4.7 Number of Cells (N ) Max. System Voltage1 Float Voltage of Battery 54

4.8 Allowable Battery Voltage (Min) No, of cells x Cell End voltage 99.9

The allowable minimum battery voltage is higher than the allowable minimum system voltage

Battery sizing Calculation-110 V

5 Calculation of Various Loads

Continuous Load 19.33

5.2 Calculation of Momentary Loads

5.2.1 Momentary Tripping Load Assuming Load at 90 % of Nominal Voltage

5.2.2 Momentary Closing Load Assuming Load at 90 % of Nominal Voltage

5.3 Emergency Lighting Load Assuming Load at 90 % of Nominal Voltage

5.4 Load Curve

Duration in Min 1

59

119

1

Type of Load Momentary Tripping Load + Continuous Load + Emergency Load

Continuous Load + Emergency Load

Continuous Load

Momentary Closing Load+Continuous Load

Load in Amps 185.52

39.53

19.33

25.15

Remarks

I Calculation of Loads I Continuous Load Calculation

S.No

1 11 KV SWITCHGEAR PANEL

a OUTGING PANEL-1 Backup Protection 10 0.09 DC Fail MonitorRelay, 2 Nos 10 0.09 Trip Supervision Relay for CB , 6 No Trip Coils 30 0.27 Trip Unit Supervision relay, 2 Nos 6.6 0.06 Check Sysnchronising relay 20 0.18 Total Load 76.6 0.70

b INCOMING PANEL-1

Transformer Protection Relay Panel 10 0.09 Directional OIC & E/F Relay(2 Nos) 20 0.18 DC Fail Monitor Relay, 2 Nos 10 0.09 Trip Supervision Relay for CB , 6 No Trip Coils 30 0.27 Trip Unit Supervision relay, 2 Nos 6.6 0.06 Total Load 76.6 0.70

c INCOMING PANEL-2

Transformer Protection Relay Panel 10 0.09 Directional O/C & EIF Relay(2 Nos) 20 0.18 DC Fail Monitor Relay, 2 Nos 10 0.09 Trip Supervision Relay for CB , 6 No Trip Coils 30 0.27 Trip Unit Supervision relay, 2 Nos 6.6 0.06 Total Load 76.6 0.70

d INCOMING PANELS

Transformer Protection Relay Panel 10 0.09 Directional O/C & EIF Relay(2 Nos) 20 0.18 DC Fail Monitor Relay, 2 Nos 10 0.09 Trip Supervision Relay for CB , 6 No Trip Coils 30 0.27 Trip Unit Supervision relay, 2 Nos 6.6 0.06 Total Load 76.6 0.70

e INCOMING PANEL-4

Transformer Protection Relay Panel I 0 0.09 Directional OIC & EIF Relay(2 Nos) 20 0.18 DC Fail Monitor Relay, 2 Nos 10 0.09 Trip Supervision Relay for CB , 6 No Trip Coils 30 0.27 Trip Unit Supervision relay, 2 Nos 6.6 0.06

Load in watts

Description Load in Amps

I Calculation of Loads I Total Load 76.6 0.70

f INCOMING PANEL-5

Transformer Protection Relay Panel 10 0.09 Directional OIC & EIF Relay(2 Nos) 20 0.18 DC Fail Monitor Relay, 2 Nos 10 0.09 Trip Supervision Relay for CB , 6 No Trip Coils 30 0.27 Trip Unit Supervision relay, 3 Nos 6.6 0.06 Total Load 76.6 0.70

g INCOMING PANEL-6

Transformer Protection Relay Panel 10 0.09 Directional OIC & EIF Relay(2 Nos) 20 0.18 DC Fail Monitor Relay, 2 Nos 10 0.09 Trip Supervision Relay for CB , 6 No Trip Coils 30 0.27 Trip Unit Supervision relay, 2 Nos 6.6 0.06 Total Load 76.6 0.70

h Bus Bar Protection Panel

Bus Bar Protection Relay , 1 Nos 20 0.18 DC Fail MonitorRelay, 2 Nos 6.6 0.06 Total Load 26.6 0.24

2 STATION TRANSFORMER PANEL

Transformer Protection Relav Panel 10 0.09 Directional OIC & EIF Relay(2 Nos) 20 0.18 DC Fail Monitor Relay, 2 Nos 10 0.09 Trip Supervision Relay for CB , 6 No Trip Coils 30 0.27 Trip Unit Supervision relay, 2 Nos 6.6 0.06 Total Load 76.6 0.70

3 CONTROL & RELAY PANEL

Transformer Protection Relay Panel 10 Directional O/C & EIF Relay(2 Nos) 20 Distance Protection 10 Synchronising check 10 Auto recloser 10 0.09 Over load protection 10 0.09 Standby Earth fault 10 0.09 Over flux 10 0.09

1 Calculation of Loads 1

Negative phase sequence 10 0.09 C.B. Failure 10 0.09 Ref Protection (2 Nos.) 10 0.09 fuse failure 10 0.09 DC Fail Monitor Relay, 2 Nos 10 0.09 Trip Supervision Relay for CS , 6 No Trip Coils 30 0.27 Trip Unit Supervision relay, 2 Nos 6.6 0.06 Total Load 176.6 0.80

4 DC System for Battery Charger & Battery

Battery Charger & DCDB 50 0.454545 Annunciator (Charger panel) 60 0.545455 Indicating Lamps, Total Load watts 110 1

5 Isolator Interlocking Load

Isolator & Earth Switch Interlock Coil

Total Isolators & EIS 2 Wattage of each Coil 35 Total Isolator & EIS Interlocking Load Watts 35 0.318182 (Considering 50 % Load of isolators & EIS)

15 Fire Fighting Loads

Annunciation System 60 SOV ( one operating at one time) 150 Total Load 210 1.909091

16 Gateway 25 0.23

17 Station HMI cum Server 450 4.09

18 DR Workstation 450

19 Ethernet Switch 30

TOTAL LOAD 2126 TOTAL AMPS 19.3272727

Watts Watts Watts

I Calculation of Loads I Momentary Load Calculation of Momentary has been assumed as maximum Simultaneous load which will occur in case of Bus Bar Fault.

1 Breaker Tripping Load

66KV Side

No. of trip coilsl Breaker Power Consumption by each trip coil Maximum Breakers that will operate for Bus Bar Protection Momentary Tripping Load for 66KV CB(l Nos) Master Trip Relay that will operate(1 Nos) Sub-Total Load

11 KV Side

No. of trip coilsl Breaker Power Consumption by each trip coil Maximum Breakers that will operate for Bus Bar Protection Momentary Tripping Load for 11 KV CB(8 Nos) Master Trip Relay that will operate( 8 nos) Sub-Total Load

Momentary Tripping Load Considered

2 Breaker Closing Load

66 KV Side

No. of closing coilsl Breaker Power Consumption by each closing coil Maximum Breakers that will operate Momentary Closing Load for 66KV CB

11 KV Side

No. of closing coils1 Breaker 3 Power Consumption by each closing coil 300 Maximum Breakers that will operate 1 Momentary Closing Load for 11 KV CB 900

Momentary Closing Load Considered Watts 1152

Amps 5.236364

Nos Watts Nos Watts Watts Watts

Nos Watts Nos Watts Watts Watts

watts Amps

Nos Watts Nos Watts

I Calculation of Loads 1 3 Calculation of Emergency Loads

I YARD LIGHTING

Total lighting load Watts 1000 9.090909

2 Emergency lighting in control room

Total lighting load Watts 1000 9.090909

TOTAL EMERGENCY LOAD WATTS 2000 18.18182

Total Emergency Load Watts 17604.8 Amps 160.0436

Recommendations As per IEEE-485 (1978)- Battery Sizing Period Load Change in Load Duration of Period Time to end of selection Capacity at T Reqd. Sec Size

Min Rate . . . . . . . . . . - - Nos Amps Amps I Mins I l ~ i n s 1 ~ r s I K Factor

Secton 1- First Period Only

1 A l= 185.52 A1-0 = 185.52 M I 1 T=M 1 1 0.5 92.759

Section 1 (Total) 92.759

Secton 2- First Two Periods

1 I A l= 1 185.52 1 A1-0 = 1 185.52 1 M I 1 1 2 ( A2= 1 39.53 1 A2-A1= 1 -145.99 ) M2 1 59

Secton 2- First Two Periods

Maximum Section size I 102.959

T=M1 +M2 1 60 1 1.92 1.92 T=M2

1 2 3 4

356.193 -280.297 75.896

59 1

185.52 -145.99 -20.20 5.82

Section 2 (Total)

Al= A2= A3= A4=

Section 4 (Total)

M I M2 M 3 M4

102.959

185.52 39.53 19.33 25.15

1 59 119 1

A1-0= A2-A1= A3-A2= A4-A3

T=MI+M2 T=M2+M3 T=M3+M4

T=M4

180 179 120

1

4.1 4.1 3.07 0.5

760.620 -598.550 -62.020 2.909

VRLA Battery Sizing

S.No Factors

1 2 3

Calculation 1 Capacity Required After K-factor 102.95899 2 Capacity Required After aging factor 82.3671 919 3 capacity after applying Temperature Factor 98.0169584 4 Apply Design Factor 112.719502

Recommendations

Battery Size (Ah) 150 AH

Description

Aging Factor Temperature Correction Factor Design Factor

0.8 1.19 1.15

Remarks

TECHNICAL SPECIFICATION FOR ENERGY METER

Meter shall be microprocessor- based conforming to IEC 60687/1EC-62052-11/1EC-62053-2211s

14697.

Meter shall have provision for downloading data through an optical port and/ or through Rs

2321485 port.

Meter shall carry out measurement of active energy (both import & export) and reactive energy

(both import & export) by 3-phase, 4 wire principal suitable for balanced/unbalanced 3 phase

load.

Meter shall have an accuracy of at least class 0.2 for active energy and at least class 0.5 for

reactive energy according to IEC 60687, and shall be connected to class 0.2 CT core & class 0.2

PT windings.

The active & reactive energy shall be directly computed in CT & PT primary ratings.

The reactive energy shall be recorded for each metering interval in four different registers as

MVARh (lag) when active export, MVARh (Lag) when active import, MVARh (lead) when active

export, MVARh (Lead) when active import.

Two separate register shall be provided to record MVARH when system voltage is >103% and

when system voltage is47%.

Meter shall compute the net MWh & MVARh during each successive 15 minute block metering

interval along with a plus /minus sign.

Meter shall have a displav unit with a seven digit display unit. it shall display the net MWh &

MVARh with plus /minus sign and average frequency during the previous metering interval;

peak MWh demand since the last demand reset; accumulated the total (instantaneous) MWh & MVARh with a plus minus sign, date &time; and instantaneous current &voltage in each phase.

All the register shall be stored in non- volatile memory, metering register for each metering

interval, as well as accumulated totals, shall be downloadable.

At least following data shall be stored before being over written for the following parameters:

PARAMETERS DETAILS MIN. NO. OF DAYS

1. Net MWH 15 minute block

2. Aver. Freq. 15 minute block

3. Net MVARH for V>103% 15 minute block

4. Net MVARH for V<97% 15 minute block

5. Cumulative

Net MWH at every mid night

6. Cumulative

Net MVARh for V>103% at every mid night

7. Cumulative

Net MVARh for V<970/; at every mid night

8. Date &time of PTfaili~re on any phase

40 days in meter

40 days in meter

40 days in meter

40 days in meter

10 days in meter/

40 days in PC

10 days in meter/

40 days in PC

10 days in meter/

40 days in PC

The voltage metering of all the three phase shall be provided an alarm contacts provided to

signal failure to the substation automation system, as well as alarm contacts to indicate meter

healthy status. The meter shall be suitable to operate with power drawn from the PT supplies.

The burden of meters shall be less than 2 VA.

The power supply to the meter shall be healthy even with a single phase PT supply. An

automatic back up, in the event of non- availability of voltage in all the phases, shall be provided

by a long life battery

A dedicated metering master station (MMS), hardwired to energy meter. MMS shall be

complete to offer the following functionality:

I. To automatically download the meter data from each meter point at scheduled

daily intervals.

I I . To create calculated metering points by addition, subtraction and applying

multiplication factors to meter points.

Ill. To present the demand of each meter point and calculated the meter points in

graphical format over specified intervals.

IV. To calculare the total energy exchanged on meter points or calculated meter

points for different time of use periods over specified intervals.

V. To export meter data to excel format for external analysis.

VI. To calculate unscheduled interchanges (UI) and the corresponding commercial

parameters to suit the ABT requirement, the exact requirement shall be worked

out during detail engineering stage, in coordination with site.

The meter shall have means to test MWh & MVARh accuracy and calibration at site-in-situ and

test terminal blocks shall be provided for the same.

Each meter shall have a unique identification code provided by the employer and shall be

permanently marked on the front of the meter and stored in the non-volatile memory of the

meter.

The MMS shall be connected to substation LAN so as to facilitate display of energy data at other

location of the LAN. However, this may be treated as optional.

I '>la '3.d.1'~ pmljo au!p~o3ar 'siuauarnseau se q3ns sralau Aa~ns pml g u!~~ei u! papnpu! sa!a11!3ejI gz 'iz~z sn pue 1e3udol .mod uolae3lunruruoj Ip)l .......... . . ....

uollnq qsnd lasa -QW 0 Jan03 leu!wlal ralaw (q)

Aooa lalam lel

....

%SE- 01 %OI+ aaello~ (ell -:u! uo!ge!~en oa anp JOJJ~ unulxe~ PZ

I UOlleJadO 10 aldl3~llrll F7

. . - .., . uo pap1~0Jd ~uauaaueJre lu~leas

paawodJoDu! suo!s!no~d joold pnelj radwel (8u!peal ojar 'Qlun 3u132el oJaz) '3.d (a)

I%n7101 %TI IualJnJ xseu (~1

I I , ,. ., . - , .. -- I JaMod 40 asuasqe UI awl1 uollualar houau allaelon uo~l 61

IYW? Aa ino Deal s~aiawe~e~l ar

sz PZ

(VAWIVAI) 3W1103SdVl3 HUM aNVW30 9NISlM '9 (VAW/VAI) aNVW3a 'WW lN3S38d 'S

(a~31/9Vl) '3.d YOUVj M3MOd 'P (MVAX/VAW/VAI/MW/MY)

avo1 3AUV 9NINNnU Sn03NVlNVlNI 'E (HVAW/HVN) A9Y3N3 1N3MVddV.Z

( HMW/HM)I) A983N3 3AlUV 'T

AVldSla lN3W33S L lI9108

N011W3d0 INVYaVnD t

.- . . - Aeldso!p 1181~ 50 'ON

iasar 'a'w jo 'ou 50 helds!a a2uer 3!ueueAa

iuar~n3 BU!UQIS unu!~!~ Qpedej 8u!peo~rano

J%U~J.$~

88 dg183/L69PT SI I6LLEI SI lad sv 88 d'B183/L69bI 51 /6LLET SI lad sV

0s

3VAOIT-MEHdE 3V A O'IIISIP - MP Hd E

(~OOZ 01) VT 01 vs SZ'O WN

L69tI Sl / L89 331

~IVH~

-. LT g~ ST ~1 €1 21

buanbalj g aaellon. a~uaraja~ ie I!~>J!? a8ez10~ q3ea u! ssol 1a~o.d LU~JJ~~ 3!Seq le l!n>J!3 lUalJn3 q3ea U! ~101 JaMOd

(ZH) AJUanbaJj a~ua~aja~ p~epuel~

(A) a8ell0~ a3uaJajaJ prepuns

(v) luarJn3 snonu!~uo~ .xew (y) luaJJn3 ,!seg

A~ern33vjo ssel3 ~alatu jo adAl

~sru~ojuo~~aiau ayi q3!q~ 01 prepuels rnoj g aueu s,rayeW

NOlldlM3S3Cl

OT 6 8

L

g

s

E z I

'ON '1s

ANGLES PROVIDED WITH WELDED BOLT

TECHNICAL DAT SHEET FOR CURRENT TRANSFORMER 72.5 KV SYSTEM

Installation Outdoor

Maximum temperature rise of 55 Deg C over an Windings immersed in oil ambient of 45 Deg C

Current transformer Insulation levels

One minute 50 Hz withstand Voltage1 induced over voltage:

Impulse withstand voltage, Positive and negative polarity 1.2150 microsecond wave:

Minimum creep age distance: of insulator

Rated primary current: Applicable standard

140 KV (rms)

325 KV peak

27 mm IkV

Rated Secondary current: All cores ( 1A)

a) Rated short time (3 second) Thermal current

b) Short circuit with- Stand current

Dynamic withstand current: No. of cores in each CT Ratios for core 1,

31.5 kA (rms)

31.5 kA (rms)

31.5 kA (peak) single

75-1 5011A

Rated burden & class of accuracy of different cores

Burden in VA Class ISF Vk Rct (Max)

Core1 5 3.2 <5 >500V (10 ohm

TECHNICAL DATA SHEET FOR POTENTIAL TRANSFORMER 72.5 KV SYSTEM

SI.No

1

2

3

4

5

6

7

8

9

10

11

12

13

Particulars

Make

Service (Indoor l Outdoor)

Type

Rated frequency

Voltage ratings a) Nominal System voltage b) Highest System voltage c) Primary phase to earth

voltage d) Secondary phase to sarth

voltage

Siesmic co-efficient

System neutral earthing

Class of insulation

Insulation level : a) 1 min. power frequency

withstand voltage dry

b) Lightning impulse withstand voltage

On minute power frequency withstand voltage - secondary winding

a) Min. Creepage distance (Total)

b) Min. Creepage distance (Protected)

Rated voltage factor I) Continuous ii) 30 sec

Phase angle error

Unit

Hz

KV rms KV rms KV rms

V rms

Zone lV

KV rms

KV Peak

KV rms

mmlkV

mm

Data for 66 KV PTs

Outdoor

I-Phase, oil cooled, electromegnetic type

50

66 72.5

66 / 43

110143

As per IS 1893

solidly grounded

Class 'A'

140

325

3

25

50% of total creepage

1.2 1.5

~t 20 minutes

Guaranteed Particulars to be filled by the bidder

TECHNICAL DATA SHEET FOR POTENTIAL TRANSFORMER 72.5 KV SYSTEM

SI.No

14

15

16

17

18

19

20

22

Particulars

Secondary protection by

Instrument security factor

Weight

Dimensions

Reference standards

No. of secondary cores

Core Details :

a) Ratio

Primary 66kV d3

Secondary

b) Burden

c) Accuracy class

d) Purpose i) Voltage transfomier on lines (receiving end)

ii) Voltage transfornier on lines (sending end)

Service

Unit

Tonnes

mm x mm x mm

CORE I

I 10143

10 VA

0.2

Metering

Metering

outdoor

Data for 66 KV PTs

Fuse

IS : 31 56

1

Guaranteed Particulars to be filled by the bidder