Open Rtd Sensor - GE 489 Instruction Manual

4 SETPOINT PROGRAMMING
T
RTD #12
T
[ENTER] for more
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.
T

OPEN RTD SENSOR

T
[ENTER] for more
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 pro-
grammed as latched so that intermittent RTDs are detected and corrective action may be taken.
GE Power Management
ð
RTD #12 APPLICATION:
ENTER
Ambient
ESCAPE
RTD #12 NAME:
ESCAPE
MESSAGE
RTD #12 ALARM:
ESCAPE
Off
MESSAGE
ASSIGN ALARM
ESCAPE
RELAYS (2-5): ---5
MESSAGE
RTD #12 ALARM
ESCAPE
TEMPERATURE: 60°C
MESSAGE
RTD #12 ALARM
ESCAPE
EVENTS: Off
MESSAGE
RTD #12 TRIP:
ESCAPE
Off
MESSAGE
RTD #12 TRIP VOTING:
ESCAPE
RTD #12
MESSAGE
ASSIGN TRIP
ESCAPE
RELAYS (1-4): 1---
MESSAGE
RTD #12 TRIP
ESCAPE
TEMPERATURE: 80°C
MESSAGE
ð
OPEN RTD SENSOR:
ENTER
Off
ESCAPE
ASSIGN ALARM
ESCAPE
RELAYS (2-5): ---5
MESSAGE
OPEN RTD SENSOR
ESCAPE
ALARM EVENTS: Off
MESSAGE
489 Generator Management Relay
4.9 S8 RTD TEMPERATURE
Range: Stator, Bearing, Ambient, Other, None
Range: 8 alphanumeric characters
Range: Off, Latched, Unlatched
Range: Any combination of Relays 2 to 5.
Range: 1 to 250°C in steps of 1
Range: On, Off
Range: Off, Latched, Unlatched
Range: RTD #1 to RTD #12
Range: Any combination of Relays 1 to 4
Range: 1 to 250°C in steps of 1
4.9.6 OPEN RTD SENSOR
Range: Off, Latched, Unlatched
Range: Any combination of Relays 2 to 5
Range: On, Off
4.9.5 RTD 12
4
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