9 8 7 6 5 4 3 2 1

1 245 kV CT (1600A) CORE DETAILS ( FOR TBC & ICT BAY) (TABLE - IIC): 420 kV CT (2500A) CORE DETAILS : 2 2 BILL OF QUANTITY - 220kV :
MIN. KNEE MAX. CT MAX. EXCITING MIN. KNEE MAX. CT MAX. EXCITING ITEM ORIGINAL ACTUAL ADDITIONAL
CORE CURRENT OUTPUT ACCURACY CORE
APPLICATION CURRENT OUTPUT ACCURACY POINT S.W.R DESCRIPTION SYMBOLE DESIGNATION 1
APPLICATION POINT S.W.R CURRENT AT NO RATIO BURDEN(VA) CLASS CURRENT AT CODE SCOPE QTY. QTY.
NO RATIO BURDEN(VA) CLASS VOLT. (V) (ohm) KPV (mA)
VOLT. (V) (ohm)
BUS 1600 /
'*' 1600 / 8/
KPV (mA)
25 on 1600/1 TAP
'*' QTY.
BUS 2500 / 1250 / 10/ 60 on 2500/1 TAP 245KV, 2500A, 40KA FOR 1 SECOND, OUTDOOR SF6,CIRCUIT BREAKER (3-PH.)
01 DIFFERENTIAL, 800 / 1 - PX 800 4 50 on 800/1 TAP 01 DIFFERENTIAL, 1250 /1 - PX 625 5 120 on 1250/1 TAP 2 1 01 SET 01 SET 00 NOS. 20352

(3000A, 40kA / 1SEC.)

( With Support Structure )

(3000A, 40kA / 1SEC.)

220KV TRANSFER BUS

CHECK

(1600A, 40kA / 1SEC.)

CHECK

220KV MAIN BUS-I

220KV MAIN BUS-II

BUS 1600 / 1600 / 8/ 25 on 1600/1 TAP 245KV, 1600A, 40KA FOR 1 SECOND, OUTDOOR SF6,CIRCUIT BREAKER (3-PH.)
BUS 1250 / 10/ 60 on 2500/1 TAP 2 2 02 SET 02 SET 00 SET 20152, 20252
02 DIFFERENTIAL, 800 / 1 - PX 800 4 50 on 800/1 TAP 2500 / ( With Support Structure )
MAIN 02 DIFFERENTIAL, 1250 /1 - PX 625 5 120 on 1250/1 TAP
- MAIN
1600 / 2 3 245kV, 2500A, 40kA, 1 - PH CURRENT TRANSFORMER WITH 120% EXTENDED CURRENT RATING 03 NOS. 03 NOS. 00 NOS. 203CT
03 METERING 800 / 1 20 0.2S - - -
- 2500 / 20 -
F 2 4 245kV, 1600A, 40kA, 1 - PH CURRENT TRANSFORMER WITH 120% EXTENDED CURRENT RATING F
TRANSF 1600 / 1600 / 8/ 25 on 1600/1 TAP 03 METERING 1250 /1 20 0.2S - - - 06 NOS. 06 NOS. 00 NOS. 201CT, 202 CT
04 BACK UP / LINE - PX 800 4 -
800 / 1 50 on 800/1 TAP
PROTECTION 5 245KV, 2500A, 40KA, DOUBLE BREAK ISOLATOR WITH TWO EARTH SWITCH (3-PH.)
- 1 02 SET 01 SET 00 NOS. 20389L
# # TRANSF 1600 / 8/ 25 on 1600/1 TAP 2500 / 20
1600 / 04 METERING 20 0.2S - - -
1250 /1
2B1 CVT

2B2 CVT

05 DIFF. / LINE 800 / 1 - PX 800 4 50 on 800/1 TAP -

220kV LINE BAY-1

PROTECTION 6 245KV, 1600A, 40KA, DOUBLE BREAK ISOLATOR WITH TWO EARTH SWITCH (3-PH.)
20389B 1 20189A, 20189T
02 SET 03 SET 01 NOS.

203
TRANSF 1250 / 10/ 60 on 2500/1 TAP 20289C

2
NOTE : 1. PROTECTION CORES SHALL BE OF ACCURACY CLASS PX AS PER IEC 61869. 2500 /
2. METERING CORE SHALL BE OF ACCURACY CLASS 0.2S AS PER IEC: 61869. 05 BACK UP / LINE 1250 /1 - PX 625 5 120 on 1250/1 TAP
PROTECTION 2 7 245KV, 2500A, 40KA, DOUBLE BREAK ISOLATOR WITH ONE EARTH SWITCH (3-PH.)
00 SET 01 NOS.
2

01 SET 20389A

20389LE2
20389LE1

20389C
245 kV CT (2500A) CORE DETAILS (FOR LINE BAY) : TRANSF 2500 / 1250 / 10/ 60 on 2500/1 TAP

20389L
20352
2
20389AE
20389A

06 DIFF. / LINE 1250 /1 - PX 625 5 120 on 1250/1 TAP 2 8 245KV, 1600A, 40KA, DOUBLE BREAK ISOLATOR WITH ONE EARTH SWITCH (3-PH.)

203 CT
PROTECTION 02 SET 01 SET 00 NOS. 20289A
MIN. KNEE MAX. CT MAX. EXCITING
CORE APPLICATION CURRENT OUTPUT ACCURACY POINT S.W.R
NO RATIO BURDEN(VA) CLASS CURRENT AT
VOLT. (V) (ohm) KPV (mA) NOTE : 1. PROTECTION CORES SHALL BE OF ACCURACY CLASS PX AS PER IEC 61869.
P2

P1
9 245KV, 2500A, 40KA, DOUBLE BREAK ISOLATOR WITHOUT EARTH SWITCH (3-PH.)
'*' 2

2500-900/1-1A
2500-900/1-1A

2500-900/1-1A
2500-900/1-1A

2500-900/1-1A
2. METERING CORE SHALL BE OF ACCURACY CLASS 0.2S AS PER IEC: 61869. 00 SET 02 SET 02 NOS. 20389B, 20389C
BUS 2500 / 2500 / 12.5 / 30 on 2500/1 TAP (TANDEM ARRANGEMENT)

CL-0.2S
CORE-3

CORE-1
CORE-5

CORE-2
CORE-4

CL-PX
CL-PX

CL-PX
CL-PX
01 DIFFERENTIAL, 900 / 1 - PX 900 4.5 60 on 900/1 TAP
245kV CVT CORE DETAILS (TABLE - IC):
203 CVT

CHECK 1 10 245KV, 1600A, 40KA, DOUBLE BREAK ISOLATOR WITHOUT EARTH SWITCH (3-PH.)
203LA

2 03 SET 02 SET 00 NOS. 20189C, 20289B

BUS 2500 / 2500 / 12.5 / 30 on 2500/1 TAP
20289B

(TANDEM ARRANGEMENT)
1600-800/1-1A

1600-800/1-1A

1600-800/1-1A

1600-800/1-1A

1600-800/1-1A
202

02 DIFFERENTIAL, 900 / 1 - PX 900 4.5 60 on 900/1 TAP PARTICULARS PRIMARY SECONDARY-1 SECONDARY-2 SECONDARY-3
MAIN
CORE-1

CORE-2

CORE-3

CORE-4

CORE-5
CL-0.2S
220kV TBC

11
CL-PX

CL-PX

245KV, 1600A, 40KA, DOUBLE BREAK ISOLATOR WITH EARTH SWITCH (3-PH.)
CL-PX

CL-PX
- 1 00 SET 01 SET 01 NOS. 20189B
2500 /
P2
P1

RATED (TANDEM ARRANGEMENT)

BAY

03 METERING 900 / 1 20 0.2S - - - SECONDARY 220000/ 3 110/ 3 110/ 3 110/ 3

20289CE2
20289CE1
202CT

-
20289C
20252

VOLTAGE (V)
20289AE
20289A

TRANSF 2500 / 2500 / 12.5 / 30 on 2500/1 TAP 1 12 245kV CAPACITIVE VOLTAGE TRANSFORMER (1 PH), 4400 pF 06 NOS. 09 NOS. 03 NOS. 2B1CVT, 2B2CVT, 203CVT
04 BACK UP / LINE 900 / 1 - PX 900 4.5 60 on 900/1 TAP
PROTECTION APPLICATION ---- PROTECTION PROTECTION METERING
1 13 216kV SURGE ARRESTER, 1-PH 03 NOS. 06 NOS. 03 NOS. 201LA, 203LA
TRANSF 2500 / 2500 / 12.5 / 30 on 2500/1 TAP ----
E ACCURACY 3P 3P 0.2 E
20189BE

05 DIFF. / LINE - PX 900 4.5

20189B

900 / 1 60 on 900/1 TAP

BILL OF QUANTITY - 400kV :
201

20189C

PROTECTION OUTPUT
220kV ICT BAY

BURDEN(MIN) ---- 50 VA 50 VA 50 VA
NOTE : 1. PROTECTION CORES SHALL BE OF ACCURACY CLASS PX AS PER IEC 61869. ITEM ACTUAL
(ICT - 1)

2. METERING CORE SHALL BE OF ACCURACY CLASS 0.2S AS PER IEC: 61869. DESCRIPTION SYMBOLE DESIGNATION 1
VOLTAGE 220 / 0.11 220 / 0.11 220 / 0.11 CODE QTY.
----
RATIO
20189AE1

20189AE2

20189T
20152

3 3 3 3 3 3 1 420kV, 3150A, 50kA, SF6 CIRCUIT BREAKER WITHOUT PIR WITH CSD (3-PH) 40452, 40552
02 SET
20189A

20189TE1

20189TE2

( With Support Structure )

P1
CORE-1 2 420kV, 3000A, 50kA, 1 - PH CURRENT TRANSFORMER WITH 120% EXTENDED CURRENT RATING 06 NOS. 404CT, 405CT
1600-800/1-1A
CL-PX
CORE-2 400kV LINE BAY 400kV LINE BAY 400kV LINE BAY 400kV LINE BAY 400kV LINE BAY 400kV LINE BAY 400kV LINE BAY 400kV LINE BAY
1600-800/1-1A
CL-PX (BHUJ - 2) (BHUJ - 1) (BACHAU - 4) (BACHAU - 3) (JETPUR - 2) (JETPUR - 1) (BACHAU - 2) (BACHAU - 1) 3 420kV, 3150A, 50kA, ISOLATOR ( DOUBLE BREAK ) WITH ONE E/S ( 3 - PH ) 40489A, 40489B, 40489T
CORE-3 1 06 SET
1600-800/1-1A 201 CT 40589A, 40589B, 40689A
CL-0.2S
CORE-4
1600-800/1-1A
CL-PX
CORE-5
4 336kV SURGE ARRESTER, 1-PH 03 NOS. 404LA
1600-800/1-1A
CL-PX P2

1 5 500 MVA, 3-PH, 400/220KV AUTO TRANSFORMER ( NOT IN SCOPE OF SUPPLY ) 01 NO. ICT
201LA

LINE REACTOR LINE REACTOR LINE REACTOR LINE REACTOR

ICT
(BACHAU - 4) (BACHAU - 3) (JETPUR - 2) (JETPUR - 1) SYSTEM PARAMETERS
500 MVA
400/220kV AT DESCRIPTION 400 kV 220 kV
1) HIGHEST SYSTEM VOLTAGE 420kV (r.m.s.) 245kV (r.m.s.)
404LA
2) SYSTEM OPERATING VOLTAGE 400kV 220kV

FUTURE BAY 3) P.F. WITHSTAND VOLTAGE 630kV (r.m.s.) 460kV (r.m.s.)

D D
4) LIGHTING IMPULSE 1425 KVP 1050 KVP
400KV MAIN BUS-II
WITHSTAND VOLTAGE
(4000A, 50kA / 1SEC.)
40489A
2 5) SWITCHING IMPULSE 1050 KVP ---
40489AE
WITHSTAND VOLTAGE
40452 404 407 410 413 416 419 422 425 428 1 6) CORONA EXTINCTION VOLTAGE 320 KV ---
P1

401 CORE-1
2500-1250/1A
CL-PX
7) SYSTEM FAULT LEVEL 50KA FOR 1 Sec. 40KA FOR 1 Sec.
CORE-2
2500-1250/1A
CL-PX 1 8) CREEPAGE DISTANCE 31 MM / KV 31 MM / KV
CORE-3
2500-1250/1A
40489TE CL-0.2S
2
40489T 404CT
CORE-4 LEGENDS:-
2500-1250/1A
2 CL-0.2S
CORE-5
2500-1250/1A
CL-PX
PRESENT SCOPE
CORE-6
2500-1250/1A
CL-PX
40489BE P2 EXISTING / NOT IN SCOPE

40489B 2
REFERENCE DWG/DOC. :-
40589B
2 400KV SLD - (0)-G71770-AC105-S151-001-2, REV-02

40589BE
NOTES:-
C 1. CORE DETAILS OF CT AND CVT (400KV & 220KV) SHALL BE AS PER RFP AND TS. C
2. AS PER MAIL DATED 20-03-2021, 220kV LINE BAY CONSIDERED IN PLACE OF 220kV B/C BAY.
# 3. REQUIREMENT OF 220kV BUS CVT NEED TO BE CHECKED.

NOMENCLATURE FOR EQUIPMENT MARK NO. :-

40552 405
402 P2
CORE-6
408 411 414 417 420 423 426 429 X XX XX X X
2500-1250/1A
CL-PX

CORE-5
2500-1250/1A
CL-PX

CORE-4
405CT 2500-1250/1A EARTH SWITCH
CL-0.2S

CORE-3
2 ( i.e. 'E' FOR SINGLE EB, 'E1' FOR
2500-1250/1A FIRST EB, 'E2' FOR SECOND EB )
CL-0.2S
CORE-2
2500-1250/1A
CL-PX LOCATION WITH REFERENCE
CORE-1
TO BUS OR LINE/TRAFO.
2500-1250/1A
CL-PX
- 'A' - NEAREST TO BUS
P1 - 'B' - NEXT TO A FOR 400kV
40589AE - 'L' - FOR LINE & 220kV AREA
- 'T' - FOR TRAFO
40589A 2 - 'A' - NEAREST TO BUS I SIDE FOR TIE
AREA FOR
- 'B' - NEAREST TO BUS II SIDE BOTH kV LEVEL

EQUIPMENT NO OR SHORT NAME.

(i.e. FOR ISO:89, CB:52, CT, LA, .....)
B BAY NO. (i.e. 01,02,......) B

SYSTEM VOLTAGE.
406 (4 FOR 400 kV & 2 FOR 220 kV)

2
1

403 409 412 415 418 421 424 427 430

40689AE

2
40689A
400KV MAIN BUS-I
(4000A, 50kA / 1SEC.)

TECHNO ELECTRIC & ENGG. CO. LTD.

ENGINEERS & CONSTRUCTORS
KOLKATA , INDIA

PO NO. - 4500324999 DATED : 25.03.2020

A A

TO GENERATOR - 1 FUTURE BAY TO GENERATOR - 2 FUTURE BAY TO GENERATOR - 3 BUS REACTOR TO GENERATOR - 4 FUTURE BAY FUTURE BAY TO GENERATOR - 5
0764MU_CGPL_SWYD_E_DRG_41_001

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