lockout. If the initiation is made from the INIT_2 and INIT_3 lines, an
immediate lockout occurs.
The INIT_5 line is used for blocking purposes. If the INIT_5 line is active
during a sequence start, the reclose attempt is blocked and the AR function goes to
lockout.
If more than one CBBs are started with the shot pointer, the CBB
with the smallest individual number is always selected. For
example, if the INIT_2 and INIT_4 lines are active for the
second shot, that is, the shot pointer is 2, CBB2 is started instead of
CBB5.
Even if the initiation signals are not received from the protection functions, the AR
function can be set to continue from the second to the fifth reclose shot. The AR
function can, for example, be requested to automatically continue with the
sequence when the circuit breaker fails to close when requested. In such a case, the
AR function issues a CLOSE_CB command. When the wait close time elapses, that
is, the closing of the circuit breaker fails, the next shot is automatically started.
Another example is the embedded generation on the power line, which can make
the synchronism check fail and prevent the reclosing. If the auto-reclose 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.
Section 9 1YHT530004D05 D
Control functions
712 615 series
Technical Manual
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