GE 339

7–8 339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
M3 BREAKER MAINTENANCE CHAPTER 7: MAINTENANCE
Figure 7-6: Trip Coil Monitoring logic diagram
SETPOINT
RLY1 COIL FUNCTION: Disabled = 0
Latched Alarm
Event Recorder
Transient Recorder
Alarm
OR
OR
AND
SETPOINT:
Do Not Operate, Operate
OUTPUT RELAY X
Rly 1 Coil Mn Alrm State: Operate
Message
Trip Coil current above
threshold
AND
O
R
52a/b INPUTS
Breaker Closed
Trip
From output relay 1 TRIP
SETPOINT
BYPASS BKR STATUS Enabled = 1
Disable = 0
AND
RLY1 COIL DELAY:
SETPOINT
t
PKP
LED: MAINTENANCE
Message
LED: ALARM
RESET
Command
AND
S R
LATCH
896784A1.cdr
Rly 1 Coil Mn Alrm State: Pickup