GE 750 - Measurement of Analog Input

17-
20
750/760 Feeder Management Relay GE Power Management
17.6 METERING 17 COMMISSIONING
17
17.6.12 MEASUREMENT OF ANALOG INPUT
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:
± 1.0% of full scale
Actual Values Displays:
Under subheading
A2 METERING \ ANALOG INPUT \
ANALOG INPUT
Procedure:
Inject steady values of DC current (in mA) of various values into relay terminals A1(+) and A2(-). Check that
the analog input is correctly measured and displayed.
Actual Values Displays:
Under subheading
A2 METERING \ ANALOG INPUT \
ANALOG INPUT /MIN.
Procedure:
Inject a fixed rate of ramping DC current (in mA) of various values into relay terminals A1(+) and A2(-) for at
least 2 minutes. At the end of this time check that the analog input is correctly measured and displayed.
Actual Values Displays:
Under subheading
A2 METERING \ ANALOG INPUT \
ANALOG INPUT /HOUR
Procedure:
Inject a fixed rate of ramping DC current (in mA) of various values into relay terminals A1(+) and A2(-) for at
least 2 hours. At the end of this time check that the analog input is correctly measured and displayed.