Eaton EDR 3000, Installation, Operation And Maintenance Manual

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EDR-3000 IM02602003E
In general, the autoreclosure function is only active (will be initiated) when all of the following conditions are met:
Autoreclosure function is enabled (In AR General Setting: Function =active);
Breaker contact(s) (52a or/and 52b) is (are) installed and has (have) been programmed; and
Autoreclosure is not blocked by the blocking inputs (ExBlo1/2).
1
Standby
The autoreclosure is in this state when the following conditions are met:
The breaker is in the open position;
The autoreclose function is not initiated from any initiate (start) functions; and
No external or internal AR blocking signals are present.
No autoreclose shot operation is possible if the autoreclose function is within Standby
state.
2 t-manual close block
Suppose that the breaker is open and the AR state is in Standby state. Then the breaker is closed manually. The
event “CB Pos On” starts a Manual-Close-Blocking timer and results in a state transition from »S
TANDBY
« to a transit
state - »
T
-B
LO AFTER
CB
MAN
ON«. The autoreclosure function changes into the »R
EADY
« state only as the Manual-Close-
Blocking timer elapses and the breaker is closed. By means of the manual close blocking timer, a faulty starting of the
autoreclose function in case of a Switch-OnTo-Fault condition is prevented.
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