S11 Monitoring; Trip Counter; Starter Failure - GE 469 Manual

4.12 S11 MONITORING

4.12 S11 MONITORING
S TRIP COUNTER
S [ENTER] for more
When the Trip Counter Limit is reached, an alarm will occur. The trip counter must be cleared or the alarm level
raised and the reset key must be pressed (if the alarm was latched) to reset the alarm.
For example, it might be useful to set a Trip Counter alarm at 100 so that if 100 trips occur, the resulting alarm
prompts the operator or supervisor to investigate the type of trips that occurred. A breakdown of trips by type
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may be found on A3 MAINTENANCE\TRIP COUNTERS. If a trend is detected, it would warrant further investigation.
S STARTER FAILURE
S [ENTER] for more
If the STARTER FAILURE ALARM is set to "Latched" or "Unlatched", then the Starter Status input and motor current
are monitored when the 469 initiates a trip. If the starter status contacts do not change state or motor current
does not drop to zero after the programmed time delay, an alarm occurs. The time delay should be slightly
longer than the breaker or contactor operating time. If an alarm occurs and "Breaker" was chosen as the starter
type, the alarm will be Breaker Failure. If "Contactor" was chosen for starter type, the alarm will be Welded Con-
tactor. Also, if the starter type chosen is "Breaker", Trip Coil Supervision may be enabled.
If "52 Closed" is selected, the trip coil supervision circuitry monitors the trip coil circuit for continuity any time
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the starter status input indicates that the breaker is closed or motor current is detected. If that continuity is
broken, a Starter Failure alarm will indicate Trip Coil Supervision.
If "52 Open/Closed" is selected, the trip coil supervision circuitry monitors the trip coil circuit for continuity at
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all times, regardless of breaker state. This requires an alternate path around the 52a contacts in series
with the trip coil when the breaker is open. See the following figure for modifications to the wiring and
proper resistor selection. If that continuity is broken, a Starter Failure alarm will indicate Trip Coil Supervi-
sion.
4-72
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TRIP COUNTER

ENTER
ALARM: Off
ESCAPE
ASSIGN ALARM RELAYS:
ESCAPE
Alarm
MESSAGE
TRIP COUNTER ALARM
ESCAPE
LEVEL: 25 Trips
MESSAGE
TRIP COUNTER ALARM
ESCAPE
EVENTS: Off
MESSAGE
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STARTER FAILURE

ENTER
ALARM: Off
ESCAPE
STARTER TYPE:
ESCAPE
Breaker
MESSAGE
ASSIGN ALARM RELAYS:
ESCAPE
Alarm
MESSAGE
STARTER FAILURE
ESCAPE
DELAY: 100 ms
MESSAGE
SUPERVISION OF TRIP
ESCAPE
COIL: Disabled
MESSAGE
STARTER FAILURE
ESCAPE
ALARM EVENTS: Off
MESSAGE
469 Motor Management Relay
4 SETPOINT PROGRAMMING
Range: Off, Latched, Unlatched
Range: Alarm, Alarm & Auxiliary2, Alarm & Aux2 & Aux3,
Alarm & Auxiliary3, Auxiliary2, Aux2 & Aux3, Auxiliary3
Range: 1 to 50000 Trips, step 1
Range: On, Off
4.12.2 STARTER FAILURE
Range: Off, Latched, Unlatched
Range: Breaker, Contactor
Range: Alarm, Alarm & Auxiliary2, Alarm & Aux2 & Aux3,
Alarm & Auxiliary3, Auxiliary2, Aux2 & Aux3, Auxiliary3
Range: 10 to 1000 ms, step 10
Range: Disabled, 52 Closed, 52 Open/Closed
Message seen only if Starter Type is Breaker
Range: On, Off
4.12.1 TRIP COUNTER
GE Power Management