Description of Operation
GARD 8000 Distance Relay
RFL Electronics Inc.
Any Lock-out State
Lock-out for Close
Into Fault
SIR = 0
TRIP = 0
52b = 1
Manual close security
time
Lock-out = 0
Reset
TRIP = 1
Figure 9-68. Recloser lock-out operation
The Reclose Initiate signal (SIR) starts a Start Time timer. If this timer times out while the SIR signal
is still asserted, the trip signal is still active, or the breaker is still closed, the recloser goes into lock-
out.
The recloser remains in locked-out state until the breaker is manually closed for the time set on
Security Time after Manual Close.
The CC signal (reclosing in process) will remain activated during the entire recloser sequence, since
the first attempt sequence (and any subsequent attempts) will continue until the recloser switches to the
Reset or the Lockout state.
A reclosing sequence (without synch check) is illustrated in the following Figure.
August 1, 2009
9-79
973.334.3100
