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4-54 489 Generator Management Relay GE Multilin
4.9 S8 RTD TEMPERATURE 4 SETPOINTS
4
4.9.6 OPEN RTD SENSOR
SETPOINTS ÖØ S8 RTD TEMPERATURE ÖØ 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 pro-
grammed as latched so that intermittent RTDs are detected and corrective action may be taken.
4.9.7 RTD SHORT/LOW TEMPERATURE
PATH: SETPOINTS ÖØ S8 RTD TEMPERATURE ÖØ RTD SHORT/LOW TEMP
The 489 has an RTD Short/Low Temperature alarm. This alarm will look at all RTDs that have either an alarm or trip pro-
grammed and determine if an RTD has either a short or a very low temperature (less than –50°C). Any RTDs that do not
have a trip or alarm associated with them will be ignored for this feature. When a short/low temperature is detected, the
assigned output relay will operate and a message will appear on the display identifying the RTD that caused the alarm. 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.
OPEN RTD SENSOR
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OPEN RTD SENSOR:
Off
Range: Off, Latched, Unlatched
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to 5
OPEN RTD SENSOR
ALARM EVENTS: Off
Range: On, Off
RTD SHORT/LOW TEMP
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RTD SHORT/LOW TEMP
ALARM: Off
Range: Off, Latched, Unlatched
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to 5
RTD SHORT/LOW TEMP
ALARM EVENTS: Off
Range: On, Off
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