GE 750 - Page 458

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750/760 Feeder Management Relay GE Power Management
17.9 CONTROL SCHEMES 17 COMMISSIONING
17
If setpoint
OVERCURRENT P/U INHIBIT
is to be Enabled
1. Assert logic input Setpoint Group 2. The faceplate LED should indicate the relay is using setpoint group 2.
2. Inject current above the pickup setting of an overcurrent element that is not Disabled.
3. De-assert logic input Setpoint Group 2. The LED on the faceplate should indicate the relay is still using set-
point group 2.
4. Reduce the injected current until the overcurrent element resets.
5. The LED on the faceplate should indicate the relay is now using setpoint group 1. Turn current off.
If setpoint
OVERVOLT P/U INHIBIT
is to be Enabled
1. Assert logic input Setpoint Group 2. The faceplate LED should indicate the relay is using setpoint group 2.
2. Inject voltage above the pickup setting of an overvoltage element that is not Disabled.
3. De-assert logic input Setpoint Group 2. The LED on the faceplate should indicate the relay is still using set-
point group 2.
4. Reduce the injected voltage until the overvoltage element resets.
5. The LED on the faceplate should indicate the relay is now using setpoint group 1. Turn voltage off.
If setpoint
UNDERVOLT P/U INHIBIT
is to be Enabled
1. Inject voltage above the pickup setting of an undervoltage element that is not Disabled.
2. Assert logic input Setpoint Group 2. The faceplate LED should indicate the relay is using setpoint group 2.
3. Reduce voltage below the pickup setting of an undervoltage element that is not Disabled.
4. De-assert logic input Setpoint Group 2. The LED on the faceplate should indicate the relay is still using set-
point group 2.
5. Increase the injected voltage until the undervoltage element resets.
6. The LED on the faceplate should indicate the relay is now using setpoint group 1. Turn voltage off.
If setpoint
UNDERFREQ P/U INHIBIT
is to be Enabled
1. Inject voltage with frequency above the pickup setting of an underfrequency element that is not Disabled.
2. Assert logic input Setpoint Group 2. The faceplate LED should indicate the relay is using setpoint group 2.
3. Reduce frequency below the pickup setting of an underfrequency element that is not Disabled.
4. De-assert logic input Setpoint Group 2. The LED on the faceplate should indicate the relay is still using set-
point group 2.
5. Increase the injected frequency until the underfrequency element resets.
6. The LED on the faceplate should indicate the relay is now using setpoint group 1. Turn voltage off.