Power Measurement Test - GE 489 Instruction Manual

7.3 ADDITIONAL FUNCTIONAL TESTING
The specification for reactive and apparent power is ± 1% of
steps below to verify accuracy.
1. Alter the following setpoints:
S2 SYSTEM SETUP\CURRENT SENSING\PHASE CT PRIMARY:
S2 SYSTEM SETUP\VOLTAGE SENSING\VT CONNECTION TYPE:
S2 SYSTEM SETUP\VOLTAGE SENSING\VOLTAGE TRANSFORMER RATIO:
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\POWER METERING
INJECTED CURRENT / APPLIED VOLTAGE (IA IS THE
REFERENCE VECTOR)
1 A UNIT
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 = 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
7
7-10
5 A UNIT EXPECTED
Ia = 5 A∠0°
Ib = 5 A∠120° lag
Ic = 5 A∠240° lag
+3424 kW
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
+3424 kvar
Va = 120 V∠288° lag
Vb = 120 V∠48° lag
Vc = 120 V∠168° lag
489 Generator Management Relay

7.3.2 POWER MEASUREMENT TEST

× 2 × CT × VT × VT
3
full-scale
1000
Wye
10.00:1
POWER QUANTITY
TOLERANC MEASURED
E
3329 to
3519 kW
3329 to
3519 kvar
7 TESTING
< 2 × CT. Perform the
at I
avg
POWER FACTOR
EXPECTED MEASURED
0.95 lag
0.31 lag
GE Power Management