S4 Output Relays; Description; Relay Reset Mode - GE Multilin 489 Instruction Manual

5.5

S4 Output Relays

5.5.1

Description

5.5.2

Relay Reset Mode

RELAY
5–28
Courtesy of NationalSwitchgear.com
Five of the six output relays are always non-failsafe; the 6 Service relay is always failsafe.
As a failsafe, the 6 Service relay will be energized normally and de-energize when called
upon to operate. It will also de-energize when control power to the 489 is lost and
therefore, be in its operated state. All other relays, being non-failsafe, will be de-energized
normally and energize when called upon to operate. Obviously, when control power is lost
to the 489, the output relays must be de-energized and therefore, they will be in their non-
operated state. Shorting bars in the drawout case ensure that when the 489 is drawn out,
no trip or alarm occurs. The 6 Service output will however indicate that the 489 has been
drawn out.
PATH: SETPOINTS S4 OUTPUT RELAYS
1 TRIP:
[ ] All Resets
2 AUXILIARY:
MESSAGE
All Resets
3 AUXILIARY:
MESSAGE
All Resets
4 AUXILIARY:
MESSAGE
All Resets
5 ALARM:
MESSAGE
All Resets
6 SERVICE:
MESSAGE
All Resets
Unlatched trips and alarms will reset automatically once the condition is no longer
present. Latched trip and alarm features may be reset at any time, providing that the
condition that caused the trip or alarm is no longer present and any lockout time has
expired. If any condition may be reset, the Reset Possible LED will be lit. The relays may be
programmed to All Resets which allows reset from the front keypad or the remote reset
digital input or the communications port. Optionally, they may be programmed to reset by
the Remote Reset Only (by the remote reset digital input or the communications port).
For example, selected trips such as Instantaneous Overcurrent and Ground Fault may be
assigned to output relay 2 so that they may only be reset via. the Remote Reset digital
input or the communication port. The Remote Reset terminals would be connected to a
keyswitch so that only authorized personnel could reset such a critical trip.
Assign only Short Circuit and Ground Fault to relay 2.
Program relay 2 to Remote Reset Only.
CHAPTER 5: SETPOINTS
RELAY RESET MODE
Range: All Resets, Remote Reset Only
Range: All Resets, Remote Reset Only
Range: All Resets, Remote Reset Only
Range: All Resets, Remote Reset Only
Range: All Resets, Remote Reset Only
Range: All Resets, Remote Reset Only
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL