GE 750 User Manual

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750/760 Feeder Management Relay GE Power Management
17.9 CONTROL SCHEMES 17 COMMISSIONING
17
3. Slowly reduce test voltage Source 2 supplying Incomer relay 2. At the pickup voltage of the Line Undervolt-
age 3 feature output relay 4 should operate. At this time the Incomer 1 relay should display the Transfer
Not Ready message.
4. Slowly increase test voltage Source 2. At the reset voltage of the Line Undervoltage 3 feature output relay
4 should reset. At the Incomer 1 relay after the time delay of setpoint Transfer Delay Other Source the
message Transfer Not Ready should be removed from the display. Turn voltages off - Incomer breakers 1
and 2 should trip when Undervoltage-4 times-out.
5. Check the Event Recorders in both Incomers and the Bus Tie relay for the correct messages and
sequences, then clear the recorders.
c) TRANSFER INITIATED BY LOCKOUT 86-1
1. Energize both test sources at nominal voltage, close Incomer breakers 1 and 2, and wait until the Transfer
Not Ready message is removed from the display of both Incomer relays.
2. At the Incomer 1 relay assert Logic Input No. 12 (Transformer Lockout.) The Incomer 1 relay should trip the
Incomer 1 breaker and operate output relay 6 to send a Close From Incomer 1 signal to the Bus Tie relay.
Output relay 6 at the Incomer 1 relay should reset when the Incomer 1 breaker trips, removing the signal to
the Bus Tie relay. The Bus Tie breaker should not close as the voltage on its Bus and Line inputs is too
high.
3. Slowly reduce the test Source 1 voltage. The Bus Tie breaker should close when the voltage is below the
Dead Bus Max Volts setpoint of its Synchrocheck feature. Increase the voltage to nominal.
4. At the Incomer 1 relay de-assert Logic Input No. 12 (Transformer Lockout.)
5. Momentarily assert logic input 3 (Remote Open) at the Bus Tie relay. The Bus Tie breaker should open.
6. Momentarily assert logic input 2 (Remote Close) at the Incomer 1 relay. The Incomer 1 breaker should
close.
7. Check the Event Recorders in the Incomer 1 and Bus Tie relays for the correct messages and sequences,
then clear the recorders.
d) TRANSFER INITIATED BY LOCKOUT 86-2
1. Energize both test sources at nominal voltage, and wait until the Transfer Not Ready message is removed
from the display of both Incomer relays.
2. At the Incomer 2 relay assert Logic Input No. 12 (Transformer Lockout.) The Incomer 2 relay should trip the
Incomer 2 breaker and operate output relay 6 to send a Close From Incomer 2 signal to the Bus Tie relay.
Output relay 6 at the Incomer 2 relay should reset when the Incomer 2 breaker trips, removing the signal to
the Bus Tie relay. The Bus Tie breaker should not close as the voltage on its Bus and Line inputs is too
high.
3. Slowly reduce the test Source 2 voltage. The Bus Tie breaker should close when the voltage is below the
Dead Line Max Volts setpoint of its Synchrocheck feature. Increase the voltage to nominal.
4. At the Incomer 2 relay de-assert Logic Input No. 12 (Transformer Lockout.)
5. Momentarily assert logic input 3 (Remote Open) at the Bus Tie relay. The Bus Tie breaker should open.
6. Momentarily assert logic input 2 (Remote Close) at the Incomer 2 relay. The Incomer 2 breaker should
close. Check the Event Recorders in the Incomer 2 and Bus Tie relays for the correct messages and
sequences, then clear the recorders.

GE 750 Specifications

General

Brand	GE
Model	750
Category	Relays
Language	English