Arcteq AQ-F210, Инструкция по эксплуатации

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Instruction manual –AQ F210 Feeder Protection IED 164 (292
)
Figure 4.3.3.2-68. Autoreclosing shot settings, two requests and two shots are initialized.
In this example for earth faults its own operating time settings are used and for overcurrent
time delay its set from autorecloser. Both fault types can initialize both of the shots with
different settings. If the fault evolves from earth fault AR2 to multi-phase fault, auto-recloser
will use AR1 settings for the reclosing. In this example the dead time in between of the first
and second shot is different due to need for give more time for the air to cool and de-ionize
in the case of overcurrent or multi-phase fault. If high set overcurrent stage activates in any
situation the autoreclosing sequence is ended. In this case final trip shall be issued and the
feeder closing will be locked by autorecloser. Closing of the breaker will require manual
reset of the autorecloser lock before attempting to close the breaker. Manual reset can be
applied from SCADA or locally from the HMI of the IED.
Following graphs present the principle signaling of the autorecloser in different cases
possible for this type of line. The graphs describe the available requests status, autorecloser
internal signal statuses, timer statuses, breaker controls from autorecloser and breaker
status signals.
Autorecloser operates closely with Object control and all of the breaker status and monitor
signals are forwarded from the selected Object to the autorecloser. Also circuit breaker
Open and Close signals are controlled through the dedicated Object. In cases if the breaker
cannot be closed due to it is not ready or closing is waiting for synchrocheck allowance the
wait state is forwarded to autorecloser so that it waits for Object to acknowledge either
successful closing or failure timeout. Similar situation can arise in circuit breaker open
command e.g. if the open is blocked due to SF6 gas leakage. In the failure
acknowledgements situations autorecloser is always put to lock-out state with requirement
for manual reset when the cause of the lock-out is cleared.