ABB RER620, Technical Manual

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Section 5
1MAC309294-MB F
Control functions
294 RER620
Technical Manual
reclosing. If the autoreclose sequence is continued to the second shot, a successful
synchronous reclosing is more likely than with the first shot, since the second shot lasts
longer than the first one.
Figure 150: Logic diagram of auto-initiation sequence detection
Automatic initiation can be selected with the Auto initiation Cnd setting to be the
following:
• Not allowed: no automatic initiation is allowed
• When the synchronization fails, the automatic initiation is carried out when the auto
wait time elapses and the reclosing is prevented due to a failure during the
synchronism check
• When the circuit breaker does not close, the automatic initiation is carried out if the
circuit breaker does not close within the wait close time after issuing the reclose
command
Start
timeAutoWait
No
No
No
Yes
Yes
Yes Yes
Yes
No
No
No
Reclose
LOCKOUT
Auto initiate next shot Ready for next shot
All reclosing conditions are OK
Auto wait time expired?
All conditions except sync
are OK and BLOCK is
FALSE
autoRecloseContinue
=
When sync fails or Both
autoRecloseContinue
=
CB doesn’t close or Both
Did CB close within
timeUnsuccessfulCB
?