ABB RELION REF610, Technical Reference Manual

Page: 42 / 176

Activation of any above-mentioned signal will always cause the AR
function to issue an opening command to the circuit breaker. If the
signal used for blocking is not simultaneously used for initiation of the
next shot, the AR function will generate a definite trip alarm and be
locked out.
Shot initiation is blocked only for as long as the blocking signal is
active.
In case of shot initiation while a blocking is active, the next shot (if
such has been selected and not blocked) will be initiated. This can be
used to skip Shot 1, for instance.
Disable of the auto-reclose function
The AR function can be disabled (
AR Disable
) by any of the following signals:
*
external AR disable signal
*
trip signal from the arc protection element, ARC
*
trip signal from the thermal protection element, 49
*
trip signal from the CBFAIL
*
alarm signal from the thermal protection element, 49
*
trip signal from overcurrent element 50P-2
*
trip signal from ground-fault element 50N
*
trip signal from the phase discontinuity element, 46
The trip signals from elements ARC and 49 and from the CBFAIL are fixed and will
thus always disable the AR function. External CBFAIL disabled by the digital input
signal is selected in SGB, and the alarm signal from element 49 and the trip signals
from elements 50P-2, 50N and 46 in SG3 (see Table 5.1.4.10.-12).
The AR function will remain disabled after all disable signals have
been reset for a time equal in length to the set reclaim time.
Disable will always also interrupt any ongoing shot.
42
REF610 REF610 Feeder Protection Relay
Technical Reference Manual - ANSI Version
1MRS755535