GE 750 - Measurement of Apparent Power

17-
16
750/760 Feeder Management Relay GE Power Management
17.6 METERING 17 COMMISSIONING
17
17.6.5 MEASUREMENT OF APPARENT POWER
Test Connections per Figure 17–1: RELAY TEST WIRING – WYE CONNECTION or Figure 17–2: RELAY
TEST WIRING – DELTA CONNECTION on page 17–4.
Expected Accuracy:
± 1% of full scale currents 5% to 199% of nominal voltages 50 to 130 V
Actual Values Displays:
Under subheading
A2 METERING \ POWER \
3
Φ
APPARENT POWER
Φ
A APPARENT POWER
(not available when connected Delta)
Φ
B APPARENT POWER
(not available when connected Delta)
Φ
C APPARENT POWER
(not available when connected Delta)
Procedure:
Follow the procedure outlined in Section 17.6.3: MEASUREMENT OF REAL POWER & WATTHOURS on
page 17–15.
17.6.6 MEASUREMENT OF POWER FACTOR
Test Connections per Figure 17–1: RELAY TEST WIRING – WYE CONNECTION or Figure 17–2: RELAY
TEST WIRING – DELTA CONNECTION on page 17–4.
Expected Accuracy:
± 0.02 of injected value currents 5% to 199% of nominal voltages 50 to 130 V
Actual Values Displays:
Under subheading
A2 METERING \ POWER \
3
Φ
POWER FACTOR
Φ
A POWER FACTOR
(not available when connected Delta)
Φ
B POWER FACTOR
(not available when connected Delta)
Φ
C POWER FACTOR
(not available when connected Delta)
Procedure:
Inject phase voltage and phase current of various values and angles into the relay. Check that power factor is
measured and displayed correctly for each phase. Note the 3-phase power factor = total 3
φ
real power / total
3
φ
apparent power.