2x500MW BHUSAVAL TPS

BHARAT HEAVY ELECTRICALS LIMIT

LV2 NCT-CORE-1
SWITCH YARD PT 400 LV2 NCT-CORE-2
LV2 MVA
LV2 PT VOLTAGE
STATION
TRANSFORMER HV
SWICTH YARD CT 500 MVA 80
LV2

HV

LV1
115.4734411085
0.230946882217 HV TURRET CT 250
HV NEUTRAL CT CORE-01 250
HV NEUTRAL CT CORE-02 250

LV1 NCT-CORE-2
LV1 NCT-CORE-1

DATA SHEET OF STATION TRANSFORMER

SERIAL NO
MAKE
VECTOR GROUP
TRANSFORMER RATING(HV/LV1/LV2)
% IMPEDANCE(HV/LV1/LV2)
RATED HV CURRENT
RATED SEC -1 CURRENT
RATED SEC -2 CURRENT
HV TURRET CT RATIO
HV NEUTRAL CT CORE-1CT RATIO
HV NEUTRAL CT CORE-2 CT RATIO
LV1 NEUTRAL CT CORE-1 CT RATIO
LV1 NEUTRAL CT CORE-2 CT RATIO
LV2 NEUTRAL CT CORE-1 CT RATIO
LV2 NEUTRAL CT CORE-2 CT RATIO
NOTE: Fill the data marker in RED get the value of current through CT's UNDER Normal conditi
W BHUSAVAL TPS
Y ELECTRICALS LIMITED

300 IN 0
3150 IN 0 SWGR OCA CT REF CORE-1 PRY 2928.674 3150
35 SWGR OCA CT DIFF CORE-2 PRY 2928.674 3150
6.9

LV2 OCA

LV1 OBA

0.461894
0
0 SWGR OBA CT REF CORE-1 PRY 2259.263 3150
SWGR OBA CT REF CORE-2 PRY 2259.263 3150
LV1 MVA 45
LV1 PT VOLTAGE 11.5
3150 IN 0
300 IN 0

STATION TRANSFORMER

BHEL
YNyn0yn0
400 11.5 6.9
17.5 32.5 55
115.473441108545
2259.26297821066
2928.67423101382
250 1
250 1
250 1
300 1
3150 1
300 1
3150 1
T's UNDER Normal condition.
 0.929738
0.929738

OCA

OBA

0.717226
0.717226
NOTE:
FILL ONLY THE DATA IN THE BOXES WHICH ARE MARKED RED.

PREPARED BY:

CT RATIO SWITCHTYARD SIDE

500 PRY CURRENT IN HV

SIDE

415 0 0.00210644
1.0532193 0

415 120 0.00210644

1.0532193 120

415 240 0.00210644

1.0532193 240
 VOLTAGE APPLIED ACROSS HV SIDE DURING STABILITY

DETAILS TO BE FURNISH

SERIAL NO
MAKE BHEL
VECTOR GROUP YNyn0yn0
TRANSFORMER RATING(HV/LV1/LV2) 400 11.5
% IMPEDANCE(HV-LV1/HV-LV2/LV1-LV2) 17.5 32.5
MVA RATING OF STATION TRANSFORMER 80 45
NORMAL RATED CURENT OF HV/LV1/LV2 SIDE ON 115.4734 2259.263
THEIR RESP. BASES.

115.4734 4016.468
CURRENT ON HV/LV1/LV2 SIDE ON 80 MVA BASE

DIFFERENTIAL CURRENT RESTRAINING CURRENT

R-PHASE Y-PHASE B-PHASE R-PHASE Y-PHASE

0.0000 0.0000 0.0000 0.009121 0.009121

HV STANDBY EARTH FAULT CURRENT

 LV1 STANDBY EARTH FAULT CURRENT

LV2 STANDBY EARTH FAULT CURRENT

1.THE POLARITY OF CT'S CAN BE REVERSED BY CHANGING THE PHASE ANGLE EITHER AT HV/LV1/LV2
NOTE:

2.CT RATIOS ,PT RATIO AND MVA RATING WILL CHANGE FROM SITE TO SITE.
 RATIO PRY CURRENT

CORE-2 3150 0.0000000

SEC CURRENT 0.000000000

CORE-1 300 0.0000000

SEC CURRENT 0.00000000

MVA RATING

45

CT RATIO HV TURET MVA RATING

250 LV1
80

0.00421288

HV

0.00421288

MVA RATING
LV2
0.00421288 35

CORE-1 250 0.00000 0.0000

 CORE-2 250 0.00000 0.0000

RATIO

CORE-1
300

415
CORE-2
3150

BHEL
YNyn0yn0
6.9
55
35

2928.674

6694.113

AINING CURRENT

B-PHASE

0.009121

0.00000
 0.00000

0.00000

GLE EITHER AT HV/LV1/LV2 IN BOXES MARKED RED IN COLOR.

TE.
 CURRENT FLOWING IN CT SECOND

CORE-1 3150

0.007559 180
CURRENT FLOWING IN PRY

23.81122 180

0.007559 300

23.81122 300

0.007559 420

23.81122 420

21.36904 180 0.006784 180

MVA RATING

21.36904 300 0.006784 300

 21.36904 420 0.006784 420

PRY
CURRENT SEC CURRENT
CORE-1 3150
0.0000 0.00000

CURRENT FLOWING IN CT SECOND

0.0000 0.0000
URRENT FLOWING IN CT SECONDARY

CORE-2 3150

0.007559 180

0.007559 300

0.007559 420

0.006784 180

0.006784 300
 0.006784 420

CORE-2 3150

URRENT FLOWING IN CT SECONDARY