Measurement Of Apparent Power - GE 750 Instruction Manual

17.6 METERING
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
Actual Values Displays:
Under subheading
3Φ APPARENT POWER
ΦA APPARENT POWER
ΦB APPARENT POWER
ΦC APPARENT POWER
Procedure:
Follow the procedure outlined in Section 17.6.3: MEASUREMENT OF REAL POWER & WATTHOURS on
page 17–15.
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:
Actual Values Displays:
Under subheading
3Φ POWER FACTOR
ΦA POWER FACTOR
ΦB POWER FACTOR
ΦC POWER FACTOR
Procedure:
17
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 3φ real power / total
3φ apparent power.
17-
16
Courtesy of NationalSwitchgear.com
currents 5% to 199% of nominal voltages 50 to 130 V
A2 METERING \ POWER \
(not available when connected Delta)
(not available when connected Delta)
(not available when connected Delta)
± 0.02 of injected value currents 5% to 199% of nominal voltages 50 to 130 V
A2 METERING \ POWER \
(not available when connected Delta)
(not available when connected Delta)
(not available when connected Delta)
750/760 Feeder Management Relay

17.6.5 MEASUREMENT OF APPARENT POWER

17.6.6 MEASUREMENT OF POWER FACTOR
17 COMMISSIONING
GE Power Management