I. · The project related costs shall be exempted from ... installation of line shunt reactors from...

2 Mariakani 400/220kV Substation

This tender addendum and clarification forms part of the Request for Proposal and Contract documents, and modifies them as follows:

I. CLARIFICATIONS

S.No. Clause/Paragraph/Item No. Clarification/Query Response

185

Proposed Supliers List

How many suppliers can we propose for each equipment?

In case any limitation in the number of suppliers, which

criteria will Ketraco use to reject any of them if all are

technically valid.

One or two with three as the maximum. For major suppliers Ketraco will check history and other details of the supplier. The criteria for rejection is stated with the bid documents, refer clause 3 (b), 6.4, 28.5, 32.4, 34.1 of Section I Instructions to Bidders, and items 1.7 (c), 2.7 of Section III Evaluation and Qualification Criteria

186

Interbus Transformer. Impedance - HV-LV: There is no an accurate value of the

impedance, the only requirement is >14%. - Impedance HV-TV & LV-TV. We assume that

this data is free. Please confirm

Refer to clarification number 118 of TAC3

187

Interbus Transformer. Rated Power

We kindly request the rated power for the intermediate stage: ONAF 1 (ONAN/ONAF1/ONAF2) or ONAF (ONAN/ONAF/OFAF)

Refer to clarification number 116 of TAC3

188

Civil works. IBT plinth and oil containment tank

According the price schedules point 30.31 the number of

this item is two (2) instead of four (4). It´s necessary to

1. Refer to TAC3 II Addendum Section V Schedules No 4 item No 30 ‘Civil Works’



provide four IBT and we assume that will be necessary to

install four containment tank.

2. Refer to Procurement documents Volume 2 of 2 clause 21.17.13 paragraph number 2

189

Civil works. IBT foundation In the civil work item there is not section for the “four”

autotransformers foundation. Please confirm if it have

been included in another section.

As a general guide Procurement document volume 2

of 2 item number 21 describes all the requirements

for Civil works (this includes the IBT foundations in

question)

190

Civil works. Firewalls

- In the price schedule point 30.33 the number

of the firewall is two (2), however we will

provide four (4) IBT and two line reactor come

from Rabai substations; in consequence we

will need four firewall:

- Three (3) firewalls for protect properly the IBT

against the fire

- One (1) firewalls for protect properly Rabai

shunt reactor

Please confirm

Refer to TAC3 II Addendum Section V Schedules No4 item No 30.33 for the revised number of firewalls The revised quantity of four (4) firewalls in TAC3 II Addendum Section V Scheduled No 4 item 30.33 has provisions for three (3) firewalls for the IBTs and one (1) firewall for the two reactors. However it has to be noted that final substation detailed design will determine the number of firewalls to be constructed.

191

Current Transformers. Specifications

- What is the power (VA),creepage distance and

shorcircuit currents for the current

transformers?

- We don´t have information

o About the 220 kV current transformer

For creepage distance refer to clarification number 166 of TAC 4 For power (VA) rating refer to Procurement document volume 2 of 2 item 5.2 paragraph no 3 220kV CTs close to HB1 shall have the following secondary core specs: 2500/1500/1A CL5P20 x 3



close to HB1-Diameter 1

About the 400 kV current transformers close to HB1-

Diameter 1&2

cores, CL5P20/1.0 x 2 cores 400kV CTs close to HB1 shall have the following secondary core specs: 4000/2000/1A CL5P20 x 4 cores, CL5P20/1.0 x 2 cores

192

Capacitive Voltage Transformers. Specifications

- What is the power (VA) and creepage distance

for the voltage transformers?

We don´t have information about the two (2)400 kV- CVT´s

(1 phase-2 winding) of the HB1-HB2.

For creepage distance refer to clarification number 166 of TAC4 For power (VA) rating refer to Procurement document volume 2 of 2 item 6.3 paragraph no 3 400kV CVTs shall have the following specifications:

/ / kV CL 3P/1.0 and CL 3P

193

Auxiliary Transformers. Units

Please clarify if it´s necessary to provide four auxiliary

transformers (and four 11 kV cable connection provided

from each IBT Tertiary to each auxiliary/earthing

transformer) according the drawings or only two (price

schedule)

At this stage four (4) earthing/auxiliary transformer

will be supplied. Please refer to the addendum for

adjusted quantities. Updated drawings PB-KET-2012-

D-224 and PB-KET-2012-P-288 are attached herein.

194

Auxiliary Transformers. Location

Where is located the auxiliary transformers? We assumed

that it will be in the control room.

Please confirm

The location of the auxiliary transformer has been left to the bidder’s discretion however common practice dictates that it’s located in the switchyard reasonably close to the IBT, subject to detailed design.

195

Auxiliary Transformers. Protection

How is planned to protect the connection between the

auxiliary transformers and the IBT tertiary winding? In the

Refer to drawings no PB-KET-2012-P-284, PB-KET-2012-P-285, PB-KET-2012-P-286 in clarification



drawing there is not any protection, and some failure in

this connection should have severe consequences in the

autotransformers.

Please confirm

number 3 of TAC2 for protection of the circuit between auxiliary transformer and IBT tertiary winding.

196

Have we to include VAT in the contract price? The contract price Excludes VAT

197

If funds come from Development Bank, could we get a tax

exemption? If so, is "Rail way levy tax" included?

Tax exemptions are available for IDF Fess , Duty & VAT. NOT for RDL ;RDL should be factored in the cost of materials just like any other materials handling charges

198

If the contract agreement is signed between Instalaciones

Inabensa S.A and Ketraco and Inabensa is obligated to

open a Permanent Establishment (PE) in KEnya, Can PE

issue invoices to Ketraco? If the PE issue invoices to

Ketraco, the invoices must include VAT, is Development

Bank going to pay the VAT?

NO. The project related costs shall be exempted from VAT upon application by the contractor

199

Please confirm us the percentage in KES and EUR of the

contract price.

The bidder to submit as their bid

200

Please let us know if apply withholding tax in the payment

from Development bank to IISA or EP

The invoices shall be as per the price schedules without showing the W/T element. The bank shall pay the invoices in full and KETRACO will pay the W/T and seek a refund from the contractor and issue the contractor with a certificate or the contractor pays directly to KRA and provide KETRACO with evidence of payments.



201

About advance payment of 20%, is it going to pay

immediately?

Advance payment is effected upon fulfiment of the set requirements eg provision of the advance guarantee and any other information as may be required by the bank

202

Proposed Supliers List

“All bidders need to make sure the automation system

qualifies”

We understand that only certain suppliers qualify

according a vendor list. Please provide this vendor list for

automation so we know which makes are to be used.

The contractor to provide the vendor list subject to approval by the client. The automation system must meet technical specifications and should be compatible with the existing system.

203 PB-KET-2012-D-223 Mariakani 220kV

Single Line Diagram

PB-KET-2012-D-233 Mariakani Overall

Layout

Please confirm the 220kV diameter 3 future feed is line

feed or transformer feed.

220kV future bay is a line feeder bay

204

Technical Specifications - Section VI.

Clause no: 1.2

From the scope of works, it is mentioned that we must

installation of line shunt reactors from Rabai 220/132kV

substation to Mariakani 400/220kV substation.

Please confirm the exactly Installation location of the shunt

reactor in the Mariakani.

Refer to clarification no 3 of TAC 2 drawing numbers PB-KET-2012-L-233, PB-KET-2012-L236 and PB-KET-2012-L-0016 for location of shunt reactors.

205 TECHNICAL SPECIFICATION FOR

SUBSTATIONS AND OHL

TERMINATION-14.1 scope of works

Quotation

Question1: About the quotation,if we need supply two

kinds of quotation. one for the vector group of

autotransformer (YNa0(d)) , one for the vector group of

Refer to Procurement document volume 2 of 2 clause 14.1 Note 1



autotransformer (YNyn0(d)), please confirm.

206 TECHNICAL SPECIFICATION FOR

SUBSTATIONS AND OHL

TERMINATION-14.1 scope of works

TECHNICAL SCHEDULES-K400/220kV

POWER TRANSFORMERS (AIS-AIS)-

1.36

Voltage Control

Question1:About the location of the tapped

winding,please confirm we should locate the tap changer

at the HV side or at the LV side

Refer to Procurement document volume 2 of 2 clause 14.1 Note 1

206

Technical Specifications - Section VI.

Clause no: 12.3

Measurement transformers may be of the combined CT/VT

type or separate CTs and VTs. The transformers shall be

dedicated to tariff metering purposes; usage for other

purposes is subject to approval.

Question 1: Could you please give us theTECHNICAL

SCHEDULES of the required combine voltage trensformer

& current transformer.

Refer to Procurement document volume 2 of 2 section VI item H clause 6.7

207 TAC 2, Clause no: 64 / TAC 2,

Additional statement covering item

21.11 shall read,

Local water connection point is 2km distance, to be

arranged and constructed by the Contractor.

Question 1: Please add the scope of 2 km water connection

point to the Mariakani_Price_Schedules.

Refer to Addendum hereinafter for an update to the Price Schedule

208

Particular conditions § 1.11.2.(b)

Points 1) The other permits, approvals and/or licenses, to

be acquired by the Contractor, that are not the responsibility

of the Employer under GC Clause 1.11.2(a) are:

Written consent by Private land owners for right of passage;

Not confirmed. This list shall remain as is in PCC 1.11.2(b) under the Contractor’s scope.


S.No. Clause/Paragraph/Item No. Clarification/Query Response 2) Road permits for movement of construction plant, plant

and equipment;

3) Where roads crossings are involved, consent/permission

by relevant department to disrupt traffic due to construction

activities. These kinds of approvals are usually within

Employer's scope.

Please confirm this list shall fall finally under Employer's

scope through article 1.11.2.(a).

209

Particular conditions § 5.2.2 & 5.2.10

The provisions of these 2 articles 5.2.2 vs 5.2.10 seem

contradictory.

We would understand that, as per GC 5.2.2 standard

Defect Liability Period is 540 days from the date of

Completion of the Facilities or one year from the date of

Operational Acceptance of the Facilities whichever occurs

first.

We understand that critical components subject to

extended defect liability period are: 400/200kV

Transformer, the circuit breaker and the substation control

system.

Finally, we understand that extended liability period for

the above mentioned critical components as per GC 5.2.10

is 24 months following Operational Acceptance.

Refer to II Addendum herein



Please confirm.

210

Form of Bid Security (Bank Guarantee)

Our bank informed us that a clear validity date of the Bid

Security (Bank Guarantee) should be mentioned as follows:

'This guarantee shall expire:

(a) if the Bidder is the successful Bidder, upon our receipt

of copies of the contract signed by the Bidder and the

performance security issued to you upon the instruction of

the Bidder; and

(b) if the Bidder is not the successful Bidder, upon the

earlier of (i) our receipt of a copy your notification to the

Bidder of the name of the successful Bidder; or (ii) twenty-

eight (28) days after the expiration of the Bidder's bid, i.e.

on or before ....... (Bidder to insert appropriate date).'

Please confirm this is acceptable.

Please refer to the Form of Bid Security (Bid Bond) or Form of Bid-Securing Declaration contained in Volume 1 of 2 of the Bid Documents for the correct format.

211

Section V - Bidding Forms –

Form FIN - 3.1

Historical Financial Performance

(a) In case the Bidder or partner to a JVCA is a Branch from

a main company, please confirm that financial datas to be

provided are the one from main company.

Please also clarify if such statement is applicable to the

other evaluation and qualification criterias as detailed in

Section III?

NO both companies Financial data is to be used



212

No substation security and image monitoring requirements

description in the bidding documents

Correct

213

Whether the fire alarm system for the building at the

substation is needed or not

Fire detection is required refer to clause 21.18.2 of Section VI Technical Specifications for Substation and Overhead Line Termination.

214

Since both sides of the line protection equipment must be

the same, please provide the protection model and

Manufacturers of the other end of the 400/220kV

incoming line (if the bay of contralateral substation has

been built), and the requirements for the protection

channel

Refer to clarification number 102 and 103 of TAc3

215

Whether the online monitoring system for the CT, VT,

Lightning arrester and the power transformer is needed or

not?

No online monitoring of the primary CT, VT’s or lightning arresters is required. Although, to be clear, surge counters are required for the lightning arresters, refer clause 7.2 of Section VI. Also self monitoring of the respective alarm and diagnostic functions are required for the VT and CT secondary circuits, refer to 8.1.2 of Section VI.

216

Whether the each CB of the 1 ½ CB diameters & 1 +

1/3 CB diameters need a separate numerical protection or

not. If it is, then two main sets of protection is needed or

not?

For Protection scheme design refer to clarification no 3 of TAC2 drawing numbers PB-KET-2012-P-280, PB-KET-2012-P-281, PB-KET-2012-P-282, PB-KET-2012-P-283, PB-KET-2012-P-284, PB-KET-2012-P-285, PB-KET-2012-P-286

217

The number of Auxiliary transformer in the Mariakani Bid

documents (vol 1 Proce Schedules SCHEDULE No 1 10.5

Auxiliary transformer 11/0.415kV, 500kVA) is 2, but in the

Mariakani 400kV Single Line Diagram (PB-KET-2012-D-224)

is 4, please confirm the number of Auxiliary transformer

At this stage four (4) earthing/auxiliary transformer will be supplied. Please refer to the addendum for adjusted quantities. Updated drawings PB-KET-2012-D-224 and PB-KET-2012-P-288 are attached herein.



218

In accordance with the drawings in Appendix B, there is no

Isinya 400kV Substation, so we are still unable to

determine the specific communication configuration

should be provided in the project. Please further illustrate

the specific communication schemes and configurations

required for this project.

Refer to clarification no 3 of TAC2 drawing numbers 1KHD636398 sheets 500 to 504

219

Please provide the optical cable length between Isinya

400kV Substation and Mariakani 400kV substation, the

optical cable length between Mariakani 400kV Substation

and Rabai 22okV Substation

Approximately 420km distance between Isinya and Mariakani and 25km between Mariakani and Rabai.

220

Please indicate between Rabai 220kV Substation and Isinya

400kV Substation, whether another optical cable which is

independent this project cable from Isinya 400kV

Substation to Mariakani 400kV Substation and to Rabai

220kV substation is existent

There exists an optical cable under a separate contract from Rabai to Isinya. Refer to Procurement document volume 2 of 2 item 9.2 for fibre optic requirements, where the requirement is for the contractor to construct, within the Mariakani substation, new communications equipment and associated optic cable to connect to the existing optical cable and associated remote communication system. Essentially the existing Rabai to Isinya optical cable will be diverted into the new Mariakani substation by the contractor.

221

Does this project have special requirements for supervisory

staffs?

Over and above the staff required in the bid documents, the Contractor shall provide sufficient supervisory staff to ensure safety and quality. This shall be subject to Employer / Engineer’s approval.



222

According to the TAC4, withholding Tax is payable by the

contractor on Schedules No 3 & Schedules No 4 at the

appropriate prevailing Withholding Tax rates

Does it means other taxes are taxes exemptions, such as

Customs tax and VAT, etc?

We can not find the items of Customs tax and VAT in the

Price Schedules.

Correct. Yes they are except W/tax and RDL

223

According to Volume 2, 1.33 Accomodation and Site

Storage, page 36 of 333

The office accommodation is to be provided with an

electricity supply, water supply and phone line. All phone

rental and usage charges relevant to the transmission

project shall be paid for the by the Contractor.

Are the water and electricity available in the site of the

project?

Refer to TAC 2 Additional statement covering item

21.11

224 Drawing NO. PB-KET-2012-D-224;

Drawing NO. PB-KET-2012-P-288

Drawings for issue to bidders PB-KET-2012-D-224 shows

that 4 earthing/auxiliary transformers are connected to

LVAC switchboard. Otherwise, drawings for issue to

bidders PB-KET-2012-P-288 shows that only 2

earthing/auxiliary transformers are connected to LVAC

switchboard. Please clarify.

At this stage four (4) earthing/auxiliary transformer

will be supplied. Please refer to the addendum for

adjusted quantities. Updated drawings PB-KET-2012-

D-224 and PB-KET-2012-P-288 are attached herein.

225 Notes Of Pre-Bid Site Visit;

Drawing NO. 64161A-PBP-L-

0016_P6

According to the bidding documents, the work scope of

transmission line involved in No.1-No.3 towers (green line

as drawing shown) reconstruction, several questions need

to be clarified by owner:

1. Tower no 2 weighs 49.8 tonnes

2. Installed between tower no 1 and 2: conductor type

is quad LARK, 400kV, earthwire type is aluminium clad

steel GW, OPGW type is 97T77Dz(7344)



1.Please clarify the weight of No.2 tower?

2.Please clarify the current basic information between

No.1,- No.3 towers, including conductor type, number of

sub-conductors, voltage class, earth wire and OPGW type

etc.

3.About line reconstruction part, Whether the earth wire

(including OPGW) dismantled from No.1 to No.2 towers

can be directly used as the earth wire between No.1 tower

and 400kV gantry? Whether the earth wire (including

OPGW) dismantled from No.3 to No.2 towers can be

directly used as the earth wire between No.3 tower and

220kV gantry?

Installed between tower no 2 and 3: conductor type is

single CANARY 220kV, earthwire type is aluminium

clad steel GW, OPGW type is 97TDz(7344)

3. Confirmed

No.1 tower

No.2 tower

No.3 tower


II. ADDENDUM The following items are to be added to Procurement of Mariakani 400/220kV substation document Volume 1 of 2, Schedule No 4 Civil Works: (this update is a continuation of the update to the same table in TAC2)

Item No

Description Estimated Quantity

Unit

30.50 Local water connection 1 Lot

Procurement document Volume 1 of 2 Price Schedule No 1 item 10.5, Auxiliary transformer 11/0.415kV, 500kVA quantity is changed from 2 to 4

Procurement document Volume 1 of 2 Price Schedule No 4 item 32.5, Auxiliary transformer 11/0.415kV, 500kVA quantity is changed from 2 to 4

GC 5.2.2 No modification.

GC 5.2.10 The extended defect liability period for critical components covered under the extended defect liability are 400/200kV Transformer, the circuit Breaker and the substation control system, and the period shall be five (5)] years from the date of Operational Acceptance of the facilities.*

*Please note that the successful bidder (Contractor) will require the performance guarantee to be extended for a period of five years from the date of Operational

Acceptance of the facilities 400/200kV Transformer, the circuit Breaker and the substation control system. The amount of the extended performance guarantee shall

be 10% of the amount in the schedule of prices for 400/200kV Transformer, the circuit Breaker and the substation control system. The first performance guarantee

will be valid for five hundred and forty (540) days from the date of Completion of the Facilities (or any part thereof) or one year from the date of Operational

Acceptance of the Facilities (400/200kV Transformer, the circuit Breaker and the substation control system) and will be extended to cover five years requirement for 400/200kV Transformer, the circuit Breaker and the substation control system.(effectively will be extended for four years for an amount of 10% of the amount in the contract for 400/200kV Transformer, the circuit Breaker and the substation control system from the date of Operational Acceptance of the Facilities.


Mariakani Substation Mandatory Spares

Item

No Description Unit Qty

A 220kV Circuit Breakers

1 Trip Coil No. 1

2 Closing Coil No. 1

3 Gaskets 1 set No. 1

4 SF6 gas bottle 40 kg each No. 2

5 Gas filling equipment No. 1

6 SF6 Leak detector No. 1

7 Single pole, SF6 type, circuit breaker complete with operating mechanism No. 1

8 Interrupter assembly (complete unit – one pole) No. 1

9 Operating mechanism (Complete unit for 1 pole system) No. 1

10 Overhaul Kit (for complete mechanism overhaul for 1 pole system) Set 2

B 220kV Disconnectors and 220kV Disconnectors with Earth Switch

1 Three pole set of Moving Contact (disconnectors) No. 1

2 Three pole set of Fixed Contact (disconnectors) No. 1

3 Three pole set of Moving Contact (earth switch) No. 1

4 Three pole set of Fixed Contact (earth switch) No. 1

5 Operating mechanism box complete with motor, contactor, switch, etc. for disconnector No. 1

7 Overhaul kit (for complete mechanism overhaul for Centre Break) No. 1

9 Contact Assembly for Centre Break Set 1

11 Operating mechanism (Centre Break complete unit) No. 1

C 220kV Current Transformer, Voltage Transformers and Lightning Arrestors

1 220kV current transformer, 2500 - 1500- 1/1/1/1/1A, 5 cores No. 1

2 220 kV capacitive voltage transformer, 220/√3:0.11/√3: 0.11/√3 kV No. 1

3 220 kV Lightning Arrester as per sepcification No. 1

4 Secondary fuses / MCB’s for VT Set 1


D 400kV Circuit Breakers

1 Trip Coil No. 1

2 Closing Coil No. 1

3 Gaskets 1 set No. 1

4 SF6 gas bottle 40 kg each No. 2

5 Gas filling equipment No. 1

6 SF6 Leak detector No. 1

7 Single pole, SF6 type, circuit breaker complete with operating mechanism No. 1

8 Interrupter assembly (complete unit – one pole) No. 1

9 Operating mechanism (Complete unit for 1 pole system) No. 1

10 Overhaul Kit (for complete mechanism overhaul for 1 pole system) Set 2

E 400kV Disconnectors and 220kV Disconnectors with Earth Switch

1 Three pole set of Moving Contact (disconnectors) No. 1

2 Three pole set of Fixed Contact (disconnectors) No. 1

3 Three pole set of Moving Contact (earth switch) No. 1

4 Three pole set of Fixed Contact (earth switch) No. 1

5 Operating mechanism box complete with motor, contactor, switch, etc. for disconnector No. 1

7 Overhaul kit (for complete mechanism overhaul for Centre Break) No. 1

9 Contact Assembly for Centre Break Set 1

11 Operating mechanism (Centre Break complete unit) No. 1

F 400kV Current Transformer, Voltage Transformers and Lightning Arrestors

1 400kV current transformer, 4000- 2000- 1/1/1/1/1/1A, 6 cores No. 1

2 400 kV capacitive voltage transformer,400/√3:0.11/√3: 0.11/√3 kV No. 1

3 400 kV Lightning Arrester, as per specification No. 1

4 Secondary fuses / MCB’s for VT Set 1

G Control and Relay Panels

1 Indicating lamps of each type No. 50

2 Fuses and Links (pair) of each type and rating No. 3

3 Protection relays ( One number of each of the type used in the project) No. 1

4 Voltage logic selector

5 Trip circuit supervision relay No. 2


6 Flag relay of each type No. 2

7 Auxiliary and timer Relays of each type( 10% the total number used in the project) No. Lot

8 MCBs of each type,voltage and current ratings used (DC & AC) No. 2

9 Annunciator/Alarm units No. 1

H Substation Automation

1 Bay Control Units No 4

2 Ethernet Switches No 4

3

4

Operator Workstation

SAS/ SCADA module for each of the different cards offered

No

No

1

1

I 110 V DC Distribution Board and Battery Charger

1 Changeover Contactor No. 1

2 Indicating lamps No. 5

3 Fuses and Links (pair) No. 1

4 Auxiliary Relays of each type used No. 1

5 Ammeter No. 1

6 Voltmeter No. 1

7 Diodes of each type and ratings used No. 1

8 MCBs of each type and ratings used No. 2

J 110V Battery Bank

1 Cells No. 2

2 Battery charger Lot 1

K 48V Distribution and Battery Charger



3 Fuses and Links (pair) No. 1


5 Ammeter No. 1

6 Voltmeter No. 1

7 Diodes of each type and ratings used No. 1



9 Battery bank cells No. 1

L 415V, AC Switchgear



3 Fuses and Links (pair) of each type and ratings used No. 2


5 Ammeter No. 1

6 Voltmeter No. 1


8 Photocells No. 1

M Fiber Optics Communication Equipment and VoIP system

1 Communication gateways, Media Gateway Controller No. 1

2 PoE Switch No. 1

3 IP phones No. 5

4 Telephone cable metre 150

5 Fiber optic splicing kit and consumables Set 1

6 Optical fiber ground wire (OPGW) metre 250

7

8

9

10

11

Underground non-metallic fiber cable

Each type of STM card used

Each type of Teleprotection card used

Fiber Optic approach cable drum

STM 4 Equipment with expandable capacity to STM 16

Metre

No.

No.

KM

No.

150

1

1

6

1

M Miscellaneous

1 125 V, DC lamps for control room emergency lighting system No. 15

Substation/switchyard lightning which shall include: -

1 a) Lamps of each type and power used No. 55

2 b) Lamp fittings for each type of lamps used No. 3

Maintenance tools with: -

a) Electrical maintenance tool box No. 4


b) Mechanical maintenance tool box No. 1

Arc Fusion fiber splicing kit and consumables No. 1

OTDR (Optical Time Domain Reflectometer) - MTS 8000 or its equivalent No. 1

N LVAC Board

1 Circuit breaker (MAIN incomer) No. 1

2 MCCBs (each type and rating) No. 20%

3 MCBs (each type) No. 10%

4 Indicating lamps No. 20%

5 Automatic Changeover No. 1

6 Contactors – each type No. 10%

O Autotransformer (400/220 kV)

1 400 kV bushings complete with gaskets No. 2

2 220 kV bushings complete with gaskets No. 2

3 Neutral Bushing for each transformer No. 1

4 Complete set of Gaskets as required for each tank, cover plate, manhole and hand hole for

each transformer

No. 4

5 Heat exchanger complete with fan for each transformer No. 2

6 Replacement of each part lkely to be damaged upon operation of the pressure relief device

for each transformer

No. 2

7 Complete set of contacts and coils for each type of contactor and relay for each transformer No. 2

8 Bucholz relay for each transformer No. 1

9 Motor for each on-load tap changer for each transformer No. 1

10 Set of contact for each on-load tap changer for each transformer No. 1

11 Oil level gauge for each type used for each transformer No. 1

12 Dial type thermometer for each type used for each transformer No. 1

13 Thermostat of each type used for each transfomer No. 1

14 Winding temperature indicator for each transformer No. 1

15 Oil temperature indicator for each transformer No. 1

Date: Scale: Sheet:

Designed:

Drawn:

Approved:

Checked:

Title:

Site/Project:

Client:

© Copyright Parsons Brinckerhoff

Tel: 44-(0)191-226-2000Fax: 44-(0)191-226-2104

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COMPANY (KETRACO)

NAIROBI RING DEVELOPMENTPHASE II

MARIAKANI 400/220kVSUBSTATION

400kV SINGLE LINE DIAGRAM

P Parsley

S Redshaw

S Redshaw

A Burns

PRELIMINARY

3512407A P2

3512

407A

P2

P1 02/09/2013 NEW EQUIPMENT ADDED PP DM

P2 26/09/2013 ST NUMBERING CHANGED PP DM

Date: Scale: Sheet:

Designed:

Drawn:

Approved:

Checked:

Title:

Site/Project:

Client:

© Copyright Parsons Brinckerhoff

Tel: 44-(0)191-226-2000Fax: 44-(0)191-226-2104

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KENYA ELECTRICITYTRANSMISSION COMPANY LTD

LVAC DIAGRAM

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3512407A P1

3512

407A

P1

P0 16/11/12 PRELIMINARY ISSUE MLC EB MF

P1 26/09/13 ST3 & ST4 ADDED PP DM

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