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10 COMMISSIONING
a) PROCUDURE:
1. To verify the proper functioning of the output relays, enable the "Force Output Relays Function" built into
the 745 by setting:
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT RELAYS FUNCTION: Enabled
The TEST MODE LED on the front of the relay will come ON, indicating that the relay is in test mode and
no longer in service. In test mode all output relays can be controlled manually.
2. Set the FORCE OUTPUT 1 to FORCE OUTPUT8 setpoints as follows:
3. Under SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 1 (2 to 8) set:
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 1: De-energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 2: De-energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 3: De-energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 4: De-energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 5: De-energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 6: De-energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 7: De-energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 8: De-energized
4. Using a multimeter, check that all outputs are de-energized. For outputs 2 to 5, the outputs are dry N.O.
contacts and for outputs 6 to 8, the outputs are throwover contacts (form C). Output 1 is a solid state out-
put. When de-energized, the resistance across E1 and F1 will be greater than 2 MW; when energized, and
with the multimeter positive lead on E1, the resistance will be in the 20 to 30 kW.
5. Now change the settings to:
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 1: Energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 2: Energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 3: Energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 4: Energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 5: Energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 6: Energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 7: Energized
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT 8: Energized
6. Using a multimeter, check that all outputs are now energized.
7. Now return all output forcing to De-energized and disable the relay forcing function by setting:
SETPOINTS/S6 TESTING/OUTPUT RELAYS/FORCE OUTPUT RELAYS FUNCTION: Disabled
8. All the output relays should reset.
GE Power Management
745 Transformer Management Relay
10.4 LOGIC INPUTS & OUTPUT RELAYS
10.4.2 OUTPUT RELAYS
10
10-7
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