Force Output Relays - GE 339 Instruction Manual

CHAPTER 7: MAINTENANCE

Force output relays

NOTE:
NOTE
NOTE:
NOTE
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
The 339 relay provides a test to verify that the output relays function correctly. Any relay
forced to operate will toggle from its normal state when there are no trips, alarms, or
blocks, to its active state.
When under test, the status of the output relay can be checked by navigating to
. Alternatively, an LED can be programmed to turn on upon output relay
> OUTPUT RELAYS
energization. Setting the FORCE OUTP RELAYS setpoint to "Disabled" places the output
relays back in service.
The following path is available using the keypad. For instructions on how to use the
keypad, please refer to Chapter 3 - Working with the Keypad.
PATH:
MAINTENANCE > M7 TESTING > FORCE LEDS
FORCE OUTP RELAYS
Range: Disabled, Enabled
Default: Disabled
Set FORCE OUTP RELAYS to "Enabled" to override the normal operation of the output
contact, with the programmed state.
When the FORCE OUTP RELAYS setpoint is set to Enabled, the relay Maintenenace LED
starts flashing (faceplate option E), the In-service LED turns off, the Trouble LED starts
blinking orange, and the Critical Failure Relay is de-energized, indicating the relay is in
test mode. Output relays may then be turned on and off individually using the setpoints
listed below.
If the 339 measures phase current or the control power is cycled, the FORCE OUTP RELAYS
settings will automatically become disabled and the output relays will revert back to their
normal states.
The output relays can only be forced to operate if the motor is stopped and there are no
trips, alarms, or start blocks active.
RELAY 1 TRIP
RELAY 2 CLOSE
RELAY X AUXILIARY
Range: Off, On
Default: Off
Select "On" to force the output relay to operate, and "Off" to de-energize it. The output
relays can only be forced to operate if the motor is stopped and there are no trips,
alarms, or start blocks active. Any relay is forced to operate will toggle from its normal
state when there are no trips, alarms, or blocks, to its active state. FORCE OUTP RELAYS
must be set to "Enabled" for this setting to take effect.
M7 TESTING
A1 STATUS
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