GE Multilin 345 - Page 233

CHAPTER 7: MAINTENANCE M3 BREAKER MAINTENANCE
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–7
Figure 7-5: Trip coil monitoring logic diagram
SETPOINT
TRIP COIL FUNCTION: Disabled = 0
Latched Alarm
Event Recorder
Transient Recorder
Alarm
OR
OR
AND
SETPOINT:
Do Not Operate, Operate
OUTPUT RELAY X
Trip Coil Montr OP
Message
Trip Coil current above
threshold
AND
OR
52a/b INPUTS
Breaker Closed
Trip
From output relay 1(2)
SETPOINT
BYPASS BKR STATE Enabled = 1
Disable = 0
AND
TRIP COIL DELAY:
SETPOINT
t
PKP
LED:
MAINTENANCE
Trip Coil Montr PKP
Message
LED: ALARM
RESET
Command
AND
S R
LATCH
898020A1.cdr