SOW & Addendum 1 VOl3OF3 Attachment Corr

8/6/2019 SOW & Addendum 1 VOl3OF3 Attachment Corr

1/13

SA-2 (Rev.1)

The scope of work comprises the following:-

230kV New Substation and Extension/Renovation of Existing 132kV Substation at

Fenchuganj:

SECTION-I: NEW 230KV SUBSTATION

245 kV Outdoor Switchgear for 1 Breaker System

245kV outdoor switchgear comprising four (4) diameters of 1 circuit breaker system with two

2000A three phase busbars. Two (2) diameters (all fully equipped) for the connection of two (2)

230kV overhead line circuits to Comilla (North), one 235/132/33kV auto-transformer circuit bay

and one 235/132/33kV auto-transformer circuit bay for future provision with necessary 245kV

switchgear and materials.

235/133/33 kV Auto-transformers

One set of 225/300(ONAN/ONAF) MVA, 235/132/33kV, three phase auto-transformer. The three

phase transformer unit shall be equipped with winding of tertiary delta at 33kV, the connectionsbetween the tertiary delta winding and associated earthing/auxiliary transformers by means of

33kV arrangement.

33/0.4 kV Earthing/Auxiliary Transformers

The delta connected tertiary windings of each 3-phase auto-transformers shall supply a 33/0.4 kV,

auxiliary Zig-Zag transformer (one set in total) for the purpose of supplying the substation

400/230V auxiliary power requirements.

Control and Protection for 230kV System

Control, protection equipment and substation automation system (SAS) for one 235/132/33kV

auto-transformers feeder bays, two overhead line bays and one future auto-transformer bay.

Tariff metering for 230kV System

Tariff metering panel for one 235/132/33kV auto-transformers feeder bay and two (2) overhead

line bays.

Civil Works for new 230kV substation

Complete foundations necessary for the above 230kV equipment and gantries.

Complete 230kV switchyard areas including cable ducts, internal service roads, surface treatment,

drainage, site finishing works, boundary fence, guardhouse and outdoor lighting system. Included

are the 235/132/33 kV auto transformer and 33 kV earthing compounds, 245 kV switchgear area,

and new two storied control building with cable basement. The building will include control and

relay room, Communication room, battery room, office/records room, toilet, pantry, interior

lighting, ventilation, air-conditioning, lightning protection and deep tube well for supplying

drinking water.


2/13

SA-14 (Rev.1)

SECTION-II: EXTENSION AND RENOVATION OF EXISTING 132 KV

SUBSTATION AT FENCHUGANJ

The equipment to be supplied, installed and commissioned is shown on Bid Drawings :-

Item Description

2B 145 kV Switchgear, equipment connection and steel structures

The 145 kV switchgear shall comply with the particular requirements as

detailed in the Schedule of Technical Requirements included as Appendix A1

to this section and shall comprise the following:-

2B1 One (1) set of 145 kV, 2000A, 31.5kA, 50Hz, 650kVp BIL, live tank type,

gang operated, SF6 gas circuit breakers with spring-stored energy operating

mechanism.

2B2 Seven (7) sets of 145 kV, 1600A (for transformer bay) & 1250A (for linebays), 31.5kA, 50Hz, 650kVp BIL, live tank type, single-pole operation, SF6

gas circuit breakers with spring-stored energy operating mechanism.

2B3 Nine (9) sets of 145kV, 1600A, 31.5kA, 50Hz, 650 BIL, single throw double

air break, center rotating post type, motor operated normal disconnectors with

motor-operated earthing switches.


air break, center rotating post type, motor operated normal disconnectors with

out earthing switches.


air break, center rotating post type, motor operated tandem(series) type

disconnectors with out earthing switches.

2B6 Two (2) sets of 145kV, 2000A, 31.5kA, 50Hz, 650 BIL, single throw double air

break, center rotating post type, motor operated normal type disconnectors for

bus-coupler bay

2B7 Twenty one (21) nos. of single-phase, 4-core, multi ratio, 145kV, 50Hz, 650

BIL post type current transformer.

2B8 Six (6) nos. of single-phase, 4-core, multi ratio, 145kV, 50Hz, 650 BIL post

type current transformer for bus-coupler bay.

2B9 Fifteen (15) nos. of single-phase, 145kV, 2-core, 50Hz, 650 BIL, inductive

type voltage transformers for line bay & busbar.

2B10 Twelve (12) nos. of single-phase, 145kV, 2-core, 50Hz, 650 BIL, capacitor

type voltage transformers.


3/13

SCHEDULE A

SA-15 (Rev.1)

2B11 Twenty seven (27) nos. of 120kV continuous operating voltage, 10kA nominal

discharge current, 50Hz, station class, gapless metal oxide type, single phase

surge arresters.

2B12 One (1) lot of busbar conductors (2 x 795MCM TACSR), jack bus and jumper

conductors (2 x ACSR Mallard) as required for connection of 145kV

switchgear in the technical specifications and bid drawings.

2B13 One (1) lot of insulators and fittings including all necessary clamps and

connectors required to complete 145kV switchgear extension and renovation

as specified in the technical specifications and bid drawings.

2B14 One (1) lot of gantry steel structures and equipment supports required to

complete 145kV switchgear extension and renovation as specified in the

technical specifications and bid drawings.

2B15 Sixteen (16) nos of 145kV post type support insulators.

2B16 Shifting of two (2) sets (each set per circuit) of existing switchgears, circuit

breaker & power transformer (132/33kV) with equipment support and.

Included are all necessary associated reconnection works.

2B17 Shifting of four (4) sets (each set per circuit) overhead slack span for existing

four overhead line circuits. Included are all necessary associated reconnection

works.

2F Control, Protection, Substation Automation and Metering

Protection and metering panels for all new 132kV bays are to be installed in

the existing control building. The interface panels to adapt Substationautomation system (SAS) for connection of existing and new feeders shall also

be installed in the old control room building.

The sequence of the control panels and protection panels shall mirror the

actual switchyard layout.

132 kV Circuits

The equipment to be supplied, installed and commissioned is shown on Bid

Drawings comprising the following.

2F1 Control, protection and SAS for two (2) sets of 132kV new overhead Linecircuits to Fenchuganj Power Station Substation.

2F2 Adopting new SAS for existing four overhead line bays.

2F3 Control, protection and SAS for one (1) set of 235/132/33kV AutoTransformer

circuit and associated Earthing/Auxiliary Transformer circuits. Out of two

235/132kV AutoTransformer circuit bay, one shall be kept as future provision.

2F4 Control, protection, SAS for one (1) set of Bus coupler circuit bay.


4/13

SA-16 (Rev.1)

2F5 Adopting new SAS for existing two 132/33kV transformer bays in one (1) lot.

2F6 Busbar protection panels for Complete switchyard.

2F7 Tariff Metering panel in one (1) lot to accommodate programmable &

recordable digital 3-phase, 4-wire import and export MWh and MVarh meters

(accuracy class 0.2) for each existing and new 132kV line and transformerfeeder. For each feeder minimum two(2) meters(main-1 & main-2) are to be

provided.

2F8 Communication interface marshalling cubicle in one (1) lot as specified in

Section-10, Volume 2 of 3 for establishment of SCADA system for NLDC

through multiplexer equipment.

2G Overhead Connection between 132kV side of the 235/132kV Power

Transformer in new 230kV Substation to Existing 132kV Substation

132 kV Circuit

2G1 Connection of the 132kV side of the 235/132kV Autotransformer in the new

230kV substation to the existing 132kV switchyard by overhead conductor.

All necessary gantry structure, conductors, insulators, fittings etc. are

requested to be supplied and installed under this scope.

2H Multicore Low Volateg Power and Control Cables

One (1) lot complete set of multicore low voltage auxiliary power and control

cables between all items of equipment supplied under the Contract shall be

supplied, installed with necessary gland, terminated, and identified by colours

& tags. The overall substation cable routing and core schedules shall also beprovided.

2I Earthing and Lightning Protectionn

2I.1 One(1) lot complete design, supply and installation required for Extension and

renovation of existing earthing system and lightning protection screen

including conductors, connections, connectors and clamps to suit the

substation overall arrangement and provide supporting design calculations.

2J Batteries, Chargers and DC Distribution

2J1 Replacement of existing two(2) sets 110V alkaline batteries and chargers bynew two(2) sets 110V Ni-Cad batteries complete with chargers.

The system shall generally be as shown in Bid Drawings and shall include the

following.

(a) Two(2) sets 100% Ni-cad batteries complete, each capacity shall not be

less than 400 Ah at the 5-hour rate of discharge.

(b) Two(2) sets battery chargers complete, each float charge shall not be

less than 75A rating.


5/13

SCHEDULE A

SA-17 (Rev.1)

2K LV AC Distribution

2K1 Deleted

2L Civil Works and Foundations

132kV Substation

2L1 One(1) lot complete design, supply and construction of all civil items required

for the extension and renovation of existing 132kV switchyard outdoor works,

including switchyard foundations, internal service roads, cable trenches,

surfacing, drainage, boundary fence.

2N Switchyard Lighting

One(1) lot complete design and calculations, supply, installation and

commissioning of equipment to provide lighting (sodium light) for security,

roadway and switchyard and emergency DC lighting at strategic locations forequipment operations and inspections.

2P Fibre Optic Multiplexer Equipment for Teleprotection and

Communication

2P1 Fibre Optic Multiplexer Equipment

Extensions of existing AREVA, France make DIP5000 type teleprotection

equipment and MSE 5010 type Fiber Optic Multiplexer Equipment equipment

2P2 One(1) lot of optical fibre (24 cores) cables from terminal box at 132kV gantry

structure to MDF (Main distribution Frame) to be installed in communicationroom. The Contract includes supply and installation of MDF and pigtail cables

with adequate length.

2P3 Shifting, re-installation, re-testing and re-commissioning of existing wave trap,

line matching unit (LMU), PLC equipment, cable etc required for existing

four(4) nos. overhead line circuits.


6/13

SA-20 (Rev.1)

3J1 220V DC sources are available at the existing substation. Necessary MCBs

are required to be installed under the contract for the new line bays.

3J2 48V DC sources are available at the existing substation. Necessary MCBs are

required to be installed under the contract for the new line bays.

3K LV AC Distribution

3K1 LV AC are available in the AC Distribution board. Necessary MCBs are

required to be installed under the contract for the new line bays.

3L Civil Works, Control Building and Foundations

230kV Substation

3L1 One (1) lot complete design, supply and construction of all civil items required

for the outdoor works, including switchyard foundations, access roads, internal

service roads, cable trenches, concrete culvert, surfacing, drainage etc..

3L2 Dismantling of approximately 70m boundary wall and re-construction of the

above boundary wall in the property line..

3N Switchyard Lighting

One (1) lot complete design and calculations, supply, installation and

commissioning of equipment to provide lighting for switchyard and

emergency DC lighting at strategic locations for equipment operations and

inspections for the new line bays.

3P Fibre Optic Multiplexer Equipment for Teleprotection and

Communication

3P1 Fibre Optic Multiplexer Equipment

Extensions of existing Fiber Optic Multiplexer Equipment to accommodate

two nos. overhead lines.


7/13

SA-26 (Rev.1)

Sl. No. Description Unit Requirement

16 Whether automatic control

required and referenced voltage

Yes, 110V,

50Hz

17 Whether separate remote control

panel required Yes

18 Estimated distance between remote control point and

transformer m See drawings

19 DC supply:

Nominal

Maximum float voltage,

V

V

110

125

20 Whether provision for supervisory control required,

including AVR setting

Yes

21 Whether marshalling kiosk

required

Tankside

Cubicle

22 Number of transformers for which automatic control

is to be suitable

2 (and

provision for

future 3rd)

23 TERMINATIONS

Bushing insulators or cable boxes

on line and neutral terminals:

i) HV line

ii) Neutral

iii) LV line

iv) Tertiary winding

Bushings

Bushings

Bushings

Bushings

24 BCT PARTICULARS

i) HV (235kV) Side:Core 1 & Core 2:

1600-800-

400/1A, 30VA,

5P20.

Core 3: Ratio, burden

and accuracy

class shall be

matched with

WTI meter.

ii) LV (132kV) Side:Core 1, Core 2 :

2000-1000-

500/1A, 30VA,

5P20.

Core 3: For WTI

Core 4: For tap changer

iii)Tertiary , Core 1 & 2 800/1A, 30VA,5P20


8/13

SCHEDULE A

SA-27 (Rev.1)

Sl. No. Description Unit Requirement

iv)Neutral Core 1: 2000-1000-500/1A, 30VA,

5P20

25 Accommodation on tank for

outdoor weatherproof HVneutral current transformers Yes

26 Pollution category of outdoor

bushing insulators

25 mm/kV

of system rated

(highest)

voltage

27 COOLING

Number of cooler banks required

per transformer

To suit

transformer

design28 Rating of each cooler bank as

percentage of total loss at CMR % % 50

29 Standby cooling requirement One fan in each

group

30

GENERAL

Type of oil preservation system Air Cell

31 Maximum acceptable noise level 78 dBA


9/13

Schedule B: Bid prices SB-30 (Rev.1)

CONTRACT NO. PGCB/FEN/SS/01

SCHEDULE B7

FOR GOODS AND SERVICES SUPPLIED FROM OUTSIDE EMPLOYERS CO

7.1 BREAKDOWN OF COSTS FOR CIVIL WORKS

New 230kV Substation and Extension

of 132kV Substation at Fenchuganj

and o 230 kV Substation at Comilla(N)

Foreign Currency (F/C) Price

Sl.No.

Description of Works Unit PriceFOB

TotalPrice FOB

Insurance Freight TotalPrice CIP

Erection Total F/CCost

Localtranspo

handling

1 Outdoor Foundations

2 Transformer Bases

3 Control Building:-

3.1 Foundations

3.2 Piling

3.3 Superstructure

3.4 Brickwork

3.5 Flooring/Roofing

3.6 Doors Windows etc.

3.7 Services and Finishes

4 Cable Trenches

5 Boundary Walls & Gates

6 Surfacing and Drains

7 Septic Tank and Water Supply

8 Guard House

9 Access Road

Sub Total Price carried forward

Sub Total Price in words.........................................................................................................................................


10/13

Schedule B: Bid prices SB-31 (Rev.1)

CONTRACT NO. PGCB/FEN/SS/01

SCHEDULE B7

FOR GOODS AND SERVICES SUPPLIED WITHIN EMPLOYERS COUNT

7.1 BREAKDOWN OF COSTS FOR CIVIL WORKS

New 230kV Substation and Extension

of 132kV Substation at Fenchuganj

and o 230 kV Substation at Comilla

(N)

Local Currency (L/C) Price

Bangladesh Taka :

Item Description of Works Unit Price

EXW

Total Price

EXW

transport &

handling

Erection Insurance Total price

1 Outdoor Foundations

2 Transformer Bases

3 Control Building:-

3.1 Foundations

3.2 Piling

3.3 Superstructure

3.4 Brickwork

3.5 Flooring/Roofing

3.6 Doors Windows etc.

3.7 Services and Finishes

4 Cable Trenches

5 Boundary Walls & Gates

6 Surfacing and Drains

7 Septic Tank and Water Supply

8 Guard House

9 Access Road

Sub Total Price carried forward

Sub Total Price in words.........................................................................................................................................


11/13

SA-40 (Rev.1)

APPENDIX A9

SCHEDULE OF TECHNICAL REQUIREMENTS

CONDUCTORS AND INSULATORS

No. Descriptions Unit Requirement

1. Busbar conductor for 245kV SwitchgearConductor Type TACSR

Designation 795MCM (Mallardequivalent)

Number of Conductor per phase 2

Number and Diameter of strands:

Al.

St.

Nos. x mm

Nos. x mm

-

Overall diameter mm -

Weight kg/m -

Guaranteed ultimate tensile strength kN -DC resistance at 20

oC Ohm/km -

2. Jack Bus & Jumper conductor for 245kVSwitchgear

Conductor Type ACSR

Designation Mallard



Al.

St.

Nos. x mm

Nos. x mm

30/4.135

19/2.482

Overall diameter mm 28.95

Weight kg/m 1.839

Guaranteed ultimate tensile strength kN 170

DC resistance at 20oC Ohm/km 0.07186

3. Slack span, Jackbus & jumper conductorreplacement for 132kV Switchgear

Conductor Type ACSR

Designation Mallard



Al.

St.

Nos. x mm

Nos. x mm

30/4.135

19/2.482

Overall diameter mm 28.95

Weight kg/m 1.839

Guaranteed ultimate tensile strength kN 170

DC resistance at 20oC Ohm/km 0.07186


12/13

Technical particulars & Guarantees SE-50

Sl.

No.Description Unit Bidders Data

Separate Bay controller unit provided for each bay & feeder

Type of bay controller offered HV/MV

Select Before Operate with Open Execute & Close Execute

Single bit dependence

Interlocking, bay & Station wide

Synchrocheck function:

- Maximum Voltage difference

- Maximum Frequency difference

- Maximum Phase difference

Double command blocking

Independent settable parameter groups

Local Display Unit

Sequence of event recorder:

- Events

- Time resolution

Disturbance recorder function

Comprehensive self-supervision

Battery free backup of events and disturbance records

Insulation tests

Fast disturbance tests

MTBF

MTTR

Temperature range: IEDs- Operation

- Transport and storage

Relative humidity:

- Operating max./min.

- Transport and storage

%

%

Back up control mimic -HV

Manufacturer

Name and type of product in suppliers catalogue

Origin of manufacturer

Control functionality:

Control of breaker as well as all isolators/earthing switch

(Control functionality should not be affected if bay controller fails)

Key-Locked

Interlock override function

12

Separate backup control mimic provided for each bay & feeder

13 Bay Control Unit - MV


13/13

Schedule I: Drawings

SI-2

(c) Short circuit test (special test) / Calculation.(ii) Circuit Breaker

(a)Lightning impulse voltage withstand dry test.(b)Power frequency voltage withstand dry test.(c)Out of phase switching test.(d)Short time withstand current test.

(iii) Disconnector(a)Lightning Impulse voltage withstand dry test.(b)Power frequency voltage withstand dry test.(c)Short time withstand current test.

(iv) Current Transformer(a)

Short time current test.(b)Impulse voltages withstand tests for current transformers for service inexposed installation.

(c)Power frequency voltage withstand test.(d)Temperature rise test.

(v) Voltage Transformer(a)Temperature rise test.(b)Impulse voltages withstand tests for voltage transformers for service in

exposed installation.

(c)Short circuit test(d)Short time over voltage test

(vi) Lightning arrester(a)Power frequency voltage withstand and lightning impulse voltage withstand

tests on complete arrester housing.

(b)Operating duty test.(c)Long duration current impulse withstand test.(d)Residual voltage test.(e)Pressure relief test.(f) Artificial pollution test.

(vii) Power Cable(a) Bending test followed by partial discharge test(b) Tan Delta measurement(c) Heating cycle voltage test(d) Impulse withstand test

Documents

SOW & Addendum 1 VOl3OF3 Attachment Corr