GE 489 - Manual (Page 120)

4-70 489 Generator Management Relay GE Multilin
4.11 S10 MONITORING 4 SETPOINTS
4
4.11.3 TRIP COIL MONITOR
PATH: SETPOINTS ÖØ S10 MONITORING ÖØ TRIP COIL MONITOR
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-
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.
Figure 4–19: TRIP COIL SUPERVISION
„ TRIP COIL MONITOR
„ [ENTER] for more
TRIP COIL MONITOR
ALARM: Off
Range: Off, Latched, Unlatched
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to 5
SUPERVISION OF TRIP
COIL: 52 Closed
Range: 52 Closed, 52 Open/Closed
TRIP COIL MONITOR
ALARM EVENTS: Off
Range: On, Off
ENTER
ESCAPE
р
р
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
808727A1.CDR
VALUE OF RESISTOR 'R'
SUPPLY OHMS WATTS
48 VDC
125 VDC
250 VDC
10 K
25 K
50 K
2
5
5
TRIP
COIL
TRIP COIL
SUPERVISION
R1 TRIP
CONTACT
F11
E2
F1
E11
52a
TRIP COIL CLOSED SUPERVISION
"52 Closed"
TRIP COIL
SUPERVISION
R1 TRIP
CONTACT
TRIP
COIL
F11
E2
F1
E11
52a
TRIP COIL OPEN/CLOSED SUPERVISION
"52 Open/Closed"
52a
TRIP
COIL
TRIP COIL
SUPERVISION
R1 TRIP
CONTACT
F11
E2
F1
E11
52a
TRIP COIL
OPEN/CLOSED
SUPERVISION
"52 Open/Closed"
WITH MULTIPLE
BREAKER AUX
CONTACTS