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
20%=0.2XIbase
0.1136
0.115
20%=0.2XIbase
0.1136
0.115
operated
operated
20%=0.2XIbase
0.1136
0.115
operated
LV1 SIDE
20%=0.2XIbase
0.29
0.291
operated
20%=0.2XIbase
0.29
0.291
operated
20%=0.2XIbase
0.29
0.291
operated
LV2 SIDE
Master Trip
operated or
Not
Setting in % of
Primary current
20%=0.2XIbase
0.5221
0.523
operated
20%=0.2XIbase
0.5221
0.523
operated
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
110%X Ibase
375A
2XIset
2.54
operated
110% X Ibase
375A
2XIset
2.54
operated
110% X Ibase
375A
2XIset
2.54
operated
PHASE
Setting in % of
Primary current
Set Value
in Amps
550%X Ibase
1875.5
550%X Ibase
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
20% x Ibase
68.2A
0.04
20% x Ibase
68.2A
0.04
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
120%
79.26/48
Operated
120%
79.26/48
Operated
120%
79.26/48
Operated
19/01/13
Indra/Nilesh/Murgan
M.DEVARAJULU
DATE
PERFORMED BY
CHECKED BY
Remarks
Remarks
