2 power measurement test, Power measurement test -10 – GE 489 User Manual
Page 222
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
Ч 2 Ч 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