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6-12
Control Functions
857-UM001A-EN-P – July 2009
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:
Table 6.13 – Critical AR Request
Firmware Version
>= 5.31
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.
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
When AR info is enabled, the local panel mimic display shows small
info box during AR sequence.
Critical Signal is accepted during
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