ABB Relion REC615, Техническое руководство

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Figure 333: Example of an auto-initiation sequence with synchronization failure in
the first shot and circuit breaker closing failure in the second shot
In the first shot, the synchronization condition is not fulfilled (
SYNC
is FALSE). When
the auto wait timer elapses, the sequence continues to the second shot. During the
second reclosing, the synchronization condition is fulfilled and the close command
is given to the circuit breaker after the second reclose time has elapsed.
After the second shot, the circuit breaker fails to close when the wait close time has
elapsed. The third shot is started and a new close command is given after the third
reclose time has elapsed. The circuit breaker closes normally and the reclaim time
starts. When the reclaim time has elapsed, the sequence is concluded successful.
9.4.4.3 Shot pointer controller
The execution of a reclose sequence is controlled by a shot pointer. It can be
adjusted with the SHOT_PTR monitored data.
The shot pointer starts from an initial value "1" and determines according to the
settings whether or not a certain shot is allowed to be initiated. After every shot,
the shot pointer value increases. This is carried out until a successful reclosing or
lockout takes place after a complete shot sequence containing a total of five shots.
Figure 334: Shot pointer function
Every time the shot pointer increases, the reclaim time starts. When the reclaim
time ends, the shot pointer sets to its initial value, unless no new shot is initiated.
Control functions 1MRS758755 C
666 REC615 & RER615
Technical Manual