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2 PRODUCT DESCRIPTION
RECLOSE ENABLED
The reclosure scheme is considered to be enabled when all of the following conditions are true:
•
The "AR FUNCTION" is set to ENABLED.
•
The scheme is not in the LOCKOUT state.
•
The "BLOCK" input is not asserted.
RECLOSE INITIATION
The autoreclose scheme is initiated by an enabled trip signal or physical input AR INITIATE. The scheme is initiated
provided the circuit breaker is in the closed state before protection operation and RESET LOCKOUT DELAY timer times
out.
RECLOSE IN PROGRESS (RIP)
RIP is set when a reclosing cycle begins following a reclose initiate signal. Once the cycle is successfully initiated, the RIP
will seal-in and the scheme will continue through its sequence until one of the following conditions is satisfied:
•
The close signal is issued when the AR DEAD TIME timer times out.
•
The scheme goes to lockout.
While RIP is active, the scheme checks that the breaker is open and the shot number is below the limit, and the being
measuring the AR DEAD TIME.
Each of the four possible shots has an independently settable dead time: AR DEAD TIME 1 ... AR DEAD TIME 4.
LOCKOUT
Scheme lockout blocks all phases of the reclosing cycle, preventing automatic reclosure, if any of the following occurs:
•
The maximum shot number was reached.
•
The incomplete sequence AR INCOM. SEQ TIME timer times out.
The recloser will be latched in the LOCKOUT state until the breaker has been closed and stay closed for the reset lockout
time AR RESET LO DELAY.
CLOSE
After the dead time elapses, the scheme issues the close signal. The close signal is latched until the breaker closes of the
scheme goes to LOCKOUT.
GEK-106237P
MIFII Digital Feeder Relay
2.6 RECLOSER ELEMENT
2-11
2
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