Figure. 5.5.4. - 139. Simpli ed function block diagram of the AR function.
As can be seen in the function block diagram the autorecloser is tightly dependent of the object
function block status information and con guration. Therefore in order to use autoreclosing the
controlled object has to be con gured before the autoreclosing can be used. In AQ 2xx platform the
object control block takes all control of the breaker operations which means that for example
synchrocheck, breaker status monitoring etc. breaker related functionality is not taken separately in to
account in the autorecloser function. Should any of these fail in the circuit breaker opening or closing
object control function will report the event to autorecloser function which will do corresponding action.
In addition to the previously mentioned also manual control of the breaker whether open or close
during the autoreclosing cycle will always cause reset of autorecloser. For example if the breaker is
closed manually during the Dead Time autorecloser will enter to general reclaim mode and if the
breaker is closed towards fault it will cause lock-out of autorecloser function.
Autorecloser gives through information about its operations and statuses by on-line indications, events,
registered data and also output signals which can be con gured to any output or logical input in the
device.
If network con guration is changed during the autoreclosing sequence the operation of the
autorecloser can be modi ed also correspondingly by switching setting group which matches for the
changed network situation.
Input signals for autorecloser control
For the function is used available hardware and software digital signal statuses and command signals.
The signals can be divided into Request, Command and Control signals based on how they are dealt in
the function. These input signals are also setting parameters for the function. The amount of needed
setting parameters depends of the required autoreclosing scheme.
Table. 5.5.4. - 192. AR input signals.
Signal
Range
Description
AR
spontaneous
blocking
Any
binary
signal in
the IED
Input for dynamically block the autoreclosing. When input is activated the recloser will halt its
operation and refuses any further requests. When signal is released recloser will continue its
operation as were before receiving this signal.
AQ-F255
Instruction manual
Version: 2.00
© Arcteq Relays Ltd
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