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6-10
Control Functions
857-UM001A-EN-P – July 2009
A trip signal from the protection stage can be used as a backup.
Configure the start signal of the protection stage to initiate the
AR function. If something fails in the AR function, the trip
signal of the protection stage will open the CB. The delay setting
for the protection stage should be longer than the AR start delay
and discrimination time.
If a critical signal is used to interrupt an AR sequence, the
discrimination time setting should be long enough for the critical
stage, usually at least 100 ms.
Manual Closing
When CB is closed manually with the local panel, remote bus,
digital inputs etc, AR will function as follows:
Table 6.11 – Auto-Reclose Function
Firmware Version
>= 5.31
Reclaim-state is activated. Within the reclaim time all AR
requests are ignored. It is up to protection stages to take care of
tripping. Trip signals of protection stages must be connected to
a trip relay in the output matrix.
Manual Opening
Manual CB open command during AR sequence will stop the
sequence and leaves the CB open.
Reclaim Time Setting
Table 6.12 – Reclaim Time Settings
Firmware version
Use shot specific reclaim time : No
>= 5.53
Reclaim time setting defines reclaim time between different shots
during sequence and also reclaim time after manual closing. AR
works exactly like in older firmwares.
Use shot specific reclaim time : Yes
Reclaim time setting defines reclaim time only for manual
control. Reclaim time between different shots is defined by shot
specific reclaim time settings.
Functioning
Settings
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