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7-10 489 Generator Management Relay GE Multilin
7.3 ADDITIONAL FUNCTIONAL TESTS 7 TESTING
7
7.3.2 POWER MEASUREMENT TEST
The specification for reactive and apparent power is ± 1% of × 2 × CT × VT × VT
full-scale
at I
avg
< 2 × CT. Perform the
steps below to verify accuracy.
1. Alter the following setpoints:
S2 SYSTEM SETUP Ö CURRENT SENSING Ö PHASE CT PRIMARY: "1000"
S2 SYSTEM SETUP ÖØ VOLTAGE SENSING Ö VT CONNECTION TYPE: "Wye"
S2 SYSTEM SETUP ÖØ VOLTAGE SENSING ÖØ VOLTAGE TRANSFORMER RATIO: "10.00:1"
2. Inject current and apply voltage as per the table below. Verify accuracy of the measured values. View the measured
values in:
A2 METERING DATA ÖØ POWER METERING
INJECTED CURRENT / APPLIED VOLTAGE
(IA IS THE REFERENCE VECTOR)
POWER QUANTITY POWER FACTOR
1 A UNIT 5 A UNIT EXPECTED TOLERANCE MEASURED EXPECTED MEASURED
Ia = 1 A∠0°
Ib = 1 A∠120° lag
Ic = 1 A∠240° lag
Va = 120 V∠342° lag
Vb = 120 V∠102° lag
Vc = 120 V∠222° lag
Ia = 5 A∠0°
Ib = 5 A∠120° lag
Ic = 5 A∠240° lag
Ia = 120 V∠342° lag
Vb = 120 V∠102° lag
Vc = 120 V∠222° lag
+3424 kW
3329 to 3519
kW
0.95 lag
Ia = 1 A∠0°
Ib = 1 A∠120° lag
Ic = 1 A∠240° lag
Va = 120 V∠288° lag
Vb = 120 V∠48° lag
Vc = 120 V∠168° lag
Ia = 5 A∠0°
Ib = 5 A∠120° lag
Ic = 5 A∠240° lag
Va = 120 V∠288° lag
Vb = 120 V∠48° lag
Vc = 120 V∠168° lag
+3424 kvar
3329 to 3519
kvar
0.31 lag
3