6–140 350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
S5 INPUTS/OUTPUTS CHAPTER 6: SETPOINTS
Figure 49: Relay 2 "CLOSE" logic diagram
Close request
SETPOINT (BREAKER)
52a CONTACT
Contact input
SETPOINT (BREAKER)
52b CONTACT
Contact input
AND
OR
52a contact (Breaker Closed = 1)
AND
52b contact (Breaker Open = 1)
Breaker Closed
OR
At least one
contact
programmed
AND
OR
CLOSE
No feedback
change
OR
timed reset
OR
OR
OR
AND
AND
Close Output Seal-In time
SETPOINT
t
RST
AND
CLOSE
Operate Output Relay 2
(CLOSE)
OR
Local Close (Relay Keypad)
Remote Close
Relay Status ( Ready = 1)
timer
200 ms
RUN
SETPOINT
BLOCK CLOSE RLY
Disbaled = 0
(Selected Input, ON =1)
OR
AND
Breaker Failure
Autoreclose In-Progress
AND
Autoreclose
OR
timer
2 sec
RUN
LED: BREAKER CLOSED
898776.cdr
Courtesy of NationalSwitchgear.com
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