GE 745 Instruction Manual page 246

LOGIC INPUTS AND OUTPUT RELAYS
7.3.2 Output Relays
7–8
 To verify the proper functioning of the output relays, enable the Force
Output Relays function by setting:
•
S6 TESTING
FUNCTION
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.
 Under
FORCE OUTPUT 8
 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 throw-over contacts (form-C). Output 1 is a solid state
output. When de-energized, the resistance across E1 and F1 will be
greater than 2 MΩ; when energized, and with the multimeter positive
lead on E1, the resistance will be 20 to 30 kΩ.
 Now change the
Energized.
 Using a multimeter, check that all outputs are now energized.
 Now return all output forcing to De-energized and disable the relay
forcing function by setting
OUTPUT RELAYS FUNCTION
All the output relays should reset.
OUTPUT RELAYS

: Enabled
S6 TESTING OUTPUT RELAYS

setpoints to De-energized.
FORCE OUTPUT 1
S6 TESTING
to Disabled.
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: COMMISSIONING
FORCE OUTPUT RELAYS

set the FORCE OUTPUT 1
to setpoints to
FORCE OUTPUT 8
OUTPUT RELAYS FORCE
 
to