4-72 469 Motor Management Relay GE Power Management
4.12 S11 MONITORING 4 SETPOINT PROGRAMMING
4
4.12 S11 MONITORING 4.12.1 TRIP COUNTER
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
may be found on
A3 MAINTENANCE\TRIP COUNTERS
. If a trend is detected, it would warrant further investigation.
4.12.2 STARTER FAILURE
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
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
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.
y
TRIP COUNTER
y
[ENTER] for more
TRIP COUNTER
ALARM: Off
Range: Off, Latched, Unlatched
ASSIGN ALARM RELAYS:
Alarm
Range: Alarm, Alarm & Auxiliary2, Alarm & Aux2 & Aux3,
Alarm & Auxiliary3, Auxiliary2, Aux2 & Aux3, Auxiliary3
TRIP COUNTER ALARM
LEVEL: 25 Trips
Range: 1 to 50000 Trips, step 1
TRIP COUNTER ALARM
EVENTS: Off
Range: On, Off
y
STARTER FAILURE
y
[ENTER] for more
STARTER FAILURE
ALARM: Off
Range: Off, Latched, Unlatched
STARTER TYPE:
Breaker
Range: Breaker, Contactor
ASSIGN ALARM RELAYS:
Alarm
Range: Alarm, Alarm & Auxiliary2, Alarm & Aux2 & Aux3,
Alarm & Auxiliary3, Auxiliary2, Aux2 & Aux3, Auxiliary3
STARTER FAILURE
DELAY: 100 ms
Range: 10 to 1000 ms, step 10
SUPERVISION OF TRIP
COIL: Disabled
Range: Disabled, 52 Closed, 52 Open/Closed
Message seen only if Starter Type is Breaker
STARTER FAILURE
ALARM EVENTS: Off
Range: On, Off
ENTER
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