RET 670

JSWEL Doc. No: Date: Page:

Title: TEST REPORT FOR RET 670 RELAY

EM/F/58/00 24.02.2011 PAGE 1 OF 4

TEST REPORT OF TRANSFORMER PROTECTION RELAY RET670 TESTING DATE : 19/01/13 SERVICE : Transformer-7 CURRENT/ VOLTAGE INJECTION UNIT NAME/ MODEL: DOBLE KIT/ F-6150 INJECTION UNIT SL No : 061003858

GENERAL INFORMATION & DATA TRANSFORMER DATA Voltage Ratio

220 / 34.5 / 11.5 MVA FL Current (A)

Vector Group Protection CT Ratio (Diff-600/1), (REF-500/1), (StandbyEF-200/1) 1500/1 (Diff-2500/1), (REF3000/1), (standby400/1)

YNd11yn0 Metering CT Ratio

HV

130MVA

341A

600/1

LV1

80MVA

1339A

LV2

50MVA

2510A

Make

ABB

Software version

1.1Rev01

Auxiliary supply

220V DC

Serial Number

I0733014

Type

RET670

Rating

Ir=1A, Ur=110V, 50Hz

RELAY DETAILS

A. Differential Protection (87T) :1) Pick Up Set Value in Amps

Operated Value

HV SIDE

R

20%=0.2XIbase

0.1136

0.115

Y

20%=0.2XIbase

0.1136

0.115

operated operated

B

20%=0.2XIbase

0.1136

0.115

operated

LV1 SIDE

R

20%=0.2XIbase

0.29

0.291

operated

Y

20%=0.2XIbase

0.29

0.291

operated

B

20%=0.2XIbase

0.29

0.291

operated

LV2 SIDE

Master Trip operated or Not

Setting in % of Primary current

R

20%=0.2XIbase

0.5221

0.523

operated

Y

20%=0.2XIbase

0.5221

0.523

operated

B

20%=0.2XIbase

0.5221

0.523

operated

PHASE

2) Stability 19/01/13

Indra/Nilesh/Murgan

M.DEVARAJULU

DATE

PERFORMED BY

CHECKED BY

Remarks

JSWEL Doc. No: Date: Page:

Title: TEST REPORT FOR RET 670 RELAY

PHASE

HV

R-phase R-phase Y-phase Y-phase B-phase B-phase

LV-1

0.568L0 0.568L0 0.568L240 0.568L240 0.568L120 0.568L120

1.449L210 1.449L195 1.449L90 1.449L75 1.449L330 1.449L315

EM/F/58/00 24.02.2011 PAGE 2 OF 4

HV

LV-2

0.217L0 0.217L0 0.217L240 0.217L240 0.217L120 0.217L120

REMARKS

1L180 1L150 1L60 1L30 1L300 1L270

STABLE TRIP STABLE TRIP STABLE TRIP

3)Test Slope ( checked for (a) ES1=1.25,S2=30% & (b) ES1=1.0,S2=30%,ES2=1.5,S3=50%) a)S2=30% Current @ 1.3% R-phase Y-phase B-phase

HV 0.738L0 0.738L240 0.738L120

LV-1 1.884L210 1.884L90 1.884L330

I1=443.3A I2=547A Id1=104A Ib1=495

Current @ 1.5% R-phase Y-phase B-phase

HV 0.852L0 0.852L240 0.852L120

LV-1 2.174L210 2.174L90 2.174L330

I11=511A I22=642A Id2=131A Ib2=576A

Current @ 1.6% R-phase Y-phase B-phase

HV 0.909L0 0.909L240 0.909L120

LV-1 2.319L210 2.319L90 2.319L330

I1=545 I2=810 Id1=265 Ib1=677

Current @ 1.8% R-phase Y-phase B-phase

HV 1.021L0 1.021L240 1.021L120

LV-1 2.609L210 2.609L90 2.609L330

I11=613 I22=925 Id2=313 Ib2=769

HENCE S2=33% FOUND

b) S3=50%

HENCE S3=51% FOUND

4) Harmonic blocking a) I2/I1 Phase Setting R-phase Y-phase B-phase

Operated 15

%

Remark

0.149/1,100/50Hz 0.149/1,100/50Hz 0.149/1,100/50Hz

b) I5/I1 19/01/13

Indra/Nilesh/Murgan

M.DEVARAJULU

DATE

PERFORMED BY

CHECKED BY

JSWEL Doc. No: Date: Page:

Title: TEST REPORT FOR RET 670 RELAY

Phase R-phase Y-phase B-phase

Setting

EM/F/58/00 24.02.2011 PAGE 3 OF 4

Operated 25

Remark

0.255/1,250/50Hz 0.255/1,250/50Hz 0.255/1,250/50Hz

%

B. HV Restricted Earth Fault Protection:PHASE

Setting in % of Primary current

Set Value in Amps

Operated Value

Master Trip operated or Not

40% X I base

200A

200.5 A ( 0.401A)

Operated

Remarks

C. LV Restricted Earth Fault Protection:PHASE

Setting in % of Primary current

Set Value in Amps

Operated Value

Master Trip operated or Not

40% X Ibase

1200A

0.397A

Operated

Operated Value T(sec)

Master Trip operated or Not

Remarks

D. HV Timed Over Current (TOC) Protection:1) TOC1 PHASE

Setting in % of Primary current

Set Value in Amps

R

110%X Ibase

375A

2XIset

2.54

operated

Y

110% X Ibase

375A

2XIset

2.54

operated

B

110% X Ibase

375A

2XIset

2.54

operated

PHASE

Setting in % of Primary current

Set Value in Amps

R

550%X Ibase

1875.5

Y

550%X Ibase

B

550%X Ibase

I(A)

Remarks Current Injected in all the Phases. Operating as per NI Curve

2) TOC2 Operated Value T(sec)

Master Trip operated or Not

3.2L0

0.03

operated

1875.5

3.2L240

0.03

operated

1875.5

3.2L120

0.03

operated

I(A)

E. HV Residual Earth Fault Protection based on residual current (TEF-1):19/01/13

Indra/Nilesh/Murgan

M.DEVARAJULU

DATE

PERFORMED BY

CHECKED BY

Remarks

JSWEL Doc. No: Date: Page:

Title: TEST REPORT FOR RET 670 RELAY

EM/F/58/00 24.02.2011 PAGE 4 OF 4

PHASE

Setting in % of Primary current

Set Value in Amps

Operated Value

R

20% x Ibase

68.2A

0.04

Y

20% x Ibase

68.2A

0.04

B

20% x Ibase

68.2A

0.04

Master Trip operated or Not

Remarks

operated

F. HV Standby Earth Fault Protection:- CT Ratio:200/1 PHASE

Setting in % of Primary current

Set Value in Amps

Operated Value

Master Trip operated or Not

20% X Ibase

40A

0.22

operated

G. OVER EXCITATION: PHASE Setting in % of V/Hz

Operated Value V/Hz

Master Trip operated or Not

R

120%

79.26/48

Operated

Y

120%

79.26/48

Operated

B

120%

79.26/48

Operated

19/01/13

Indra/Nilesh/Murgan

M.DEVARAJULU

DATE

PERFORMED BY

CHECKED BY

Remarks

Remarks