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6 COMMISSIONING
6.7VERIFICATION OF MEASUREMENT
Set the relay as follows
GENERAL SETTINGS
NAME
PHASE CT RATIO
GROUND CT RATIO
STV GROUND CT RATIO
PHASE VT RATIO
PHASE VT CONNECTION
NOMINAL VOLTAGE
NOMINAL FREQUENCY
PHASE ROTATION
FREQUENCY REFERENCE
AUXILIARY VOLTAGE
FREQ. TRACKING
NOTE:
ALL ANGLES INDICATED ARE LAGGING ANGLES
ALL VALUES OBTAINED IN THIS TEST MUST BE THE ONES CORRESPONDING TO THE PHASOR ONES
Apply the following voltage and frequency values to the relay:
CHANNEL
VI
VII
VIII
VX/VG
Verify that the relay measures the values with an error of ±1 % of the applied value plus 0,1% of full scale (275V).
Apply the following current and frequency values to the relay:
CHANNEL
Ia (A)
Ib (A)
Ic (A)
IG (A)
ISG (A)
Verify that the relay measures the values with an error lower than ±0.5% of the test value or ± 10 mA, whichever is greater,
for phases and ground.
Verify that the relay measures the values with an error lower than ±1.5% of the test value or ± 1 mA, whichever is greater,
for sensitive ground (SG).
GEK-113328A
VALUE
1.0
1.0
1.0
1.0
WYE
100 V
50 Hz
ABC
VI
VX
ENABLED/
DISABLED
ANGLE
FREQUENCY
50 Hz
60 Hz
0º
0
5
120º
0
5
240º
0
5
0º
0
5
ANGLE
FREQUENCY
50 Hz
60 Hz
45º
0
15
165º
0
15
285º
0
15
0º
0
15
0º
0
5
G650 Generator Protection & Control System
6.7 VERIFICATION OF MEASUREMENT
UNITS
RANGE
0.1
1.0-6000.0
0.1
1.0-6000.0
0.1
1.0-6000.0
0.1
1.0-6000.0
N/A
WYE – DELTA
0.1
1-250 V
1 Hz
50-60 Hz
N/A
ABC – ACB
N/A
VI-VII-VIII
N/A
VX – VG
N/A
N/A
50 Hz
60 Hz
50 Hz
50
100
150
50
100
150
50
100
150
50
100
150
50 Hz
60 Hz
50 Hz
10
5
1
10
5
1
10
5
1
10
5
1
1
0.1
0.01
6.7.1 VOLTAGES
60 Hz
275
275
275
275
6.7.2 PHASE CURRENTS
60 Hz
0.1
0.1
0.1
0.1
0.005
6-7
6
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