GE Multilin 489 User Manual

5–68 489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
RTDs 12 defaults to Ambient RTD type. The Ambient selection allows the RTD to be used to
monitor ambient temperature. There are individual alarm and trip configurations for this
RTD. Trip voting has been added for extra reliability in the event of RTD malfunction. If
enabled, a second RTD must also exceed the trip temperature of the RTD being checked
before a trip will be issued. If the RTD is chosen to vote with itself, the voting feature is
disabled. The RTD name may be changed if desired.
5.9.6 Open RTD Sensor
SETPOINTS ZV S8 RTD TEMPERATURE ZV OPEN RTD SENSOR
The 489 has an Open RTD Sensor Alarm. This alarm will look at all RTDs that have either an
alarm or trip programmed and determine if an RTD connection has been broken. Any RTDs
that do not have a trip or alarm associated with them will be ignored for this feature. When
a broken sensor is detected, the assigned output relay will operate and a message will
appear on the display identifying the RTD that is broken. It is recommended that if this
feature is used, the alarm be programmed as latched so that intermittent RTDs are
detected and corrective action may be taken.
MESSAGE
RTD #12 ALARM
TEMPERATURE: 60°C
Range: 1 to 250°C in steps of 1
MESSAGE
RTD #12 ALARM
EVENTS: Off
Range: On, Off
MESSAGE
RTD #12 TRIP:
Off
Range: Off, Latched, Unlatched
MESSAGE
RTD #12 TRIP VOTING:
RTD #12
Range: RTD #1 to RTD #12
MESSAGE
ASSIGN TRIP
RELAYS (1-4): 1---
Range: Any combination of Relays 1 to
4
MESSAGE
RTD #12 TRIP
TEMPERATURE: 80°C
Range: 1 to 250°C in steps of 1
1 OPEN RTD [Z]
SENSOR
OPEN RTD SENSOR:
Off
Range: Off, Latched, Unlatched
MESSAGE
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to
5
MESSAGE
OPEN RTD SENSOR
ALARM EVENTS: Off
Range: On, Off
Courtesy of NationalSwitchgear.com

GE Multilin 489 Specifications

General

Brand	GE
Model	Multilin 489
Category	Relays
Language	English