7–8
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
M3 BREAKER MAINTENANCE
CHAPTER 7: MAINTENANCE
Figure 7-8: Close coil monitoring logic diagram
SETPOINT
CLOSE COIL
FUNCTN:
Disabled = 0
Latched
Alarm
Event Recorder
Transient Recorder
Alarm
OR
OR
AND
SETPOINT
:
Do Not Operate, Operate
OUTPUT
RELA
Y X
Close Coil Montr OP
Message
Close Coil current above
threshold
AND
OR
52a/b INPUTS
Breaker Open
Close
From output relay 2 CLOSE
SETPOINT
BYP
ASS BKR ST
AT
E
Enabled = 1
Disable = 0
AND
CLOSE COIL
DELA
Y:
SETPOINT
t
PKP
LED:
MAINTENANCE
Close Coil Montr PKP
Message
LED:
ALARM
RESET
Command
AND
S
R
LA
TCH
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