GE Feeder Management Relay 750 User Manual

GE Multilin 750/760 Feeder Management Relay 8-49
8 COMMISSIONING TESTS 8.6 CONTROL SCHEMES
8
28. De-assert Logic Input 11 (Block Transfer) at the Incomer 2 relay; Output Relays 5 and 7 should operate; at both
Incomer relays the Transfer Not Ready message should be removed from the display.
29. Check the Event Recorders in the Incomer 1 and 2 and Bus Tie relays for the correct messages and sequences, then
clear the recorders.
b) LOW VOLTAGE LOGIC
1. Slowly reduce test voltage Source 1 supplying Incomer relay 1. At the pickup voltage of the Line Undervoltage 3 fea-
ture Output Relay 4 should operate. At this time the Incomer 2 relay should display the Transfer Not Ready message.
2. Slowly increase test voltage Source 1. At the reset voltage of the Line Undervoltage 3 feature Output Relay 4 should
reset. At the Incomer 2 relay after the time delay of setpoint Transfer Delay Other Source the message Transfer Not
Ready should be removed from the display.
3. Slowly reduce test voltage Source 2 supplying Incomer relay 2. At the pickup voltage of the Line Undervoltage 3 fea-
ture 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 Undervolt-
age 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 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 dis-
play of both Incomer relays.
2. At the Incomer 2 relay assert Logic Input 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.
Courtesy of NationalSwitchgear.com

GE Feeder Management Relay 750 Specifications

General

Brand	GE
Model	Feeder Management Relay 750
Category	Protection Device
Language	English