VAMP VAMP 59, Инструкции по установке, эксплуатации и настройке

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5.8 Auto-reclose function (79) 5 Control functions Technical description
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shot is treated like it doesn‟t exist and AR sequence will jump
over it. If the last shot in use is blocked, any AR request during
reclaiming of the previous shot will cause final tripping.
Starting AR sequence
Each AR request has own separate starting delay counter. The
one which starting delay has elapsed first will be selected. If
more than one delay elapses at the same time, an AR request of
the highest priority is selected. AR1 has the highest priority
and AR4 has the lowest priority. First shot is selected according
to the AR request. Next AR opens the CB and starts counting
dead time.
Starting sequence at shot 2…5 & skipping of AR shots
Each AR request line can be enabled to any combination of the
5 shots. For example making a sequence of Shot 2 and Shot 4
for AR request 1 is done by enabling AR1 only for those two
shots.
NOTE: If AR sequence is started at shot 2...5 the starting delay is taken from the
discrimination time setting of the previous shot. For example if Shot 3 is
the first shot for AR2, the starting delay for this sequence is defined by
Discrimination time of Shot 2 for AR2.
Critical AR request
Critical AR request stops the AR sequence and cause final
tripping. Critical request is ignored when AR sequence is not
running and also when AR is reclaiming.
Critical request is accepted during dead time and
discrimination time.
Shot active matrix signals
When starting delay has elapsed, active signal of the first shot
is set. If successful reclosing is executed at the end of the shot,
the active signal will be reset after reclaim time. If reclosing
was not successful or new fault appears during reclaim time,
the active of the current shot is reset and active signal of the
next shot is set (if there are any shots left before final trip).
AR running matrix signal
This signal indicates dead time. The signal is set after
controlling CB open. When dead time ends, the signal is reset
and CB is controlled close.
Final trip matrix signals
There are 5 final trip signals in the matrix, one for each AR
request (1…4 and critical). When final trip is generated, one of
these signals is set according to the AR request which caused
the final tripping. The final trip signal will stay active for 0.5
seconds and then resets automatically.