Trip Coil Monitor - GE 489 Instruction Manual

4.11 S10 MONITORING
PATH: SETPOINTS S10 MONITORING

TRIP COIL MONITOR

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If the trip coil monitor alarm feature is enabled as latched or unlatched, the trip coil supervision circuitry will monitor the trip
coil circuit for continuity any time that the breaker status input indicates that the breaker is closed. If that continuity is bro-
ken, a trip coil monitor alarm will occur in approximately 300 ms.
If 52 Open/Closed is selected, the trip coil supervision circuitry monitors the trip coil circuit for continuity at all times regard-
4
less 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 figure below for modifications to the wiring and proper resistor selection. If that continuity is broken, a Starter
Failure alarm will indicate Trip Coil Supervision.
E11
TRIP COIL
SUPERVISION
F11
E2
R1 TRIP
CONTACT
F1
TRIP COIL CLOSED SUPERVISION
"52 Closed"
808727A1.CDR
4-70
TRIP COIL MONITOR
ð
TRIP COIL MONITOR
ENTER
ð
ESCAPE ALARM: Off
ASSIGN ALARM
ESCAPE
RELAYS (2-5): ---5
MESSAGE
SUPERVISION OF TRIP
ESCAPE
COIL: 52 Closed
MESSAGE
TRIP COIL MONITOR
ESCAPE
ALARM EVENTS: Off
MESSAGE
TRIP COIL
SUPERVISION
R1 TRIP
CONTACT
52a
TRIP COIL
OPEN/CLOSED
SUPERVISION
TRIP
"52 Open/Closed"
COIL
WITH MULTIPLE
BREAKER AUX
CONTACTS
Figure 4–19: TRIP COIL SUPERVISION
489 Generator Management Relay
Range: Off, Latched, Unlatched
Range: Any combination of Relays 2 to 5
Range: 52 Closed, 52 Open/Closed
Range: On, Off
E11
TRIP COIL
SUPERVISION
F11
E2
R1 TRIP
CONTACT
F1
52a
TRIP
COIL
52a TRIP COIL OPEN/CLOSED SUPERVISION
4 SETPOINTS
4.11.3 TRIP COIL MONITOR
E11
F11
E2
F1
52a
TRIP
COIL
"52 Open/Closed"
VALUE OF RESISTOR 'R'
SUPPLY
OHMS WATTS
48 VDC
10 K 2
125 VDC
25 K 5
250 VDC
50 K 5
GE Multilin