Technical description
5 Control functions
5.7 Auto-reclose function (79)
VM259.EN007
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for shot 1 will cause final tripping. During sequence run an AR
request which is not enabled for the next shot will cause final
tripping.
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 acceptance depends on the firmware version:
Firmware
version
Critical signal is accepted during
>= 5.31
Dead time and discrimination time
< 5.31
Discrimination time only
Shot active matrix signals (firmware version >= 5.53)
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.
DI to block AR setting
This setting is useful with an external synchro-check device.
This setting only affects re-closing the CB. Re-closing can be
blocked with a digital input, virtual input or virtual output.
When the blocking input is active, CB won‘t be closed until the
blocking input becomes inactive again. When blocking becomes
inactive the CB will be controlled close immediately.
AR info for mimic display setting (firmware version >= 4.95)
When AR info is enabled, the local panel mimic display shows
small info box during AR sequence.