Trip Coil Monitor - GE Multilin 489 Instruction Manual

CHAPTER 5: SETPOINTS

5.11.3 Trip Coil Monitor

TRIP COIL
MONITOR
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
Courtesy of NationalSwitchgear.com
PATH: SETPOINTS S10 MONITORING
[ ] TRIP COIL MONITOR
ALARM: Off
ASSIGN ALARM
MESSAGE
RELAYS (2-5): ---5
SUPERVISION OF TRIP
MESSAGE
COIL: 52 Closed
TRIP COIL MONITOR
MESSAGE
ALARM EVENTS: Off
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 broken, 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 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 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
2a
TRIP
COIL
TRIP COIL CLOSED SUPERVISION
"52 Closed"
808727A1.CDR
TRIP COIL MONITOR
Range: Off, Latched, Unlatched
Range: Any combination of Relays 2 to
Range: 52 Closed, 52 Open/Closed
Range: On, Off
E11
TRIP COIL
SUPERVISION
F11
E2
R1 TRIP
CONTACT
F1
TRIP COIL
2a
OPEN/CLOSED
SUPERVISION
"52 Open/Closed"
TRIP
COIL
WITH MULTIPLE
BREAKER AUX
CONTACTS
2a
FIGURE 5–25: Trip Coil Supervision
5
E11
TRIP COIL
SUPERVISION
F11
E2
R1 TRIP
CONTACT
F1
2a
TRIP
COIL
TRIP COIL OPEN/CLOSED SUPERVISION
"52 Open/Closed"
VALUE OF RESISTOR 'R'
SUPPLY
OHMS WATTS
48 VDC
10 K 2
12 VDC
2 K
2 0 VDC
0 K
5–91