ABB RER620 Technical Manual page 300

Section 5
Control functions
294
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.
Start timeAutoWait
All reclosing conditions are OK
No
Auto wait time expired?
No
All conditions except sync
are OK and BLOCK is
FALSE
No
autoRecloseContinue =
When sync fails or Both
LOCKOUT
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
No
Yes
Did CB close within
timeUnsuccessfulCB?
Yes
Yes Yes
autoRecloseContinue =
CB doesn't close or Both
Auto initiate next shot
1MAC309294-MB F
Reclose
Yes
No
No
Ready for next shot
Technical Manual
RER620