GE 750 User Manual

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750/760 Feeder Management Relay GE Power Management
17.6 METERING 17 COMMISSIONING
17
b) BUS VOLTAGE FREQUENCY
Expected Accuracy:
Frequency: ± 0.02 Hz of injected value within the range 16.00 to 90.00 Hz
Undervoltage Inhibit: 10 V secondary
Actual Values Displays:
Under subheading
A2 METERING \ FREQUENCY \
SYSTEM FREQUENCY
Procedure:
1. Inject a voltage of nominal value at nominal frequency into phase A. Check that the frequency is measured
and displayed.
2. Check the undervoltage inhibit level by slowly reducing the voltage until the frequency is no longer mea-
sured, and "0.00 Hz" is displayed.
3. Return the voltage to nominal. Adjust the frequency above and below nominal, and note the frequency
measured by the relay.
Actual Values Displays:
Under subheading
A2 METERING \ FREQUENCY \
FREQUENCY DECAY RATE
Procedure:
Vary the frequency of the phase A voltage and verify the measured
FREQUENCY DECAY RATE
.
c) SYNCHRO VOLTAGE AND SYNCHRO FREQUENCY
Expected Accuracy:
Voltage: ± 0.68 V for 50 to 130 V
Frequency: ± 0.02 Hz of injected value within the range 16.00 to 90.00 Hz
Actual Values Displays:
Under subheading
A2 METERING \ SYNCHRO VOLTAGE \
SYNCHRO VOLTAGE
(Phasor)
SYNCHRO FREQUENCY
SYNCHRO DELTA
∆
F:
∆
V:
∆
F:
Procedure:
Inject voltage of various magnitudes and frequencies into the line voltage input and verify the displays.

GE 750 Specifications

General

Brand	GE
Model	750
Category	Relays
Language	English