ABB REC 561, User Manual

Page: 242 / 643

Auto-reclosing - Single- and/or
three-phase
ABB Network Partner AB
1MRK 580 170-XEN
Page 5 - 63
Version 1.0-00
Immediately after the start-up of the reclosing and tripping of the
breaker, the input (in Fig. 3) AR01-CBCLOSED is low (possibly also
AR01-CBREADY at type OCO). The AR Open time timer, t1S or t1,
keeps on running.
At the end of the set AR open time, t1S or t1, the respective SPTO or
TPTO (single-phase or three-phase AR time-out) is activated and goes on
to the output module for further checks and to give a closing command to
the circuit-breaker.
2.3.5 Evolving fault
A single-phase fault can result in a single-phase trip and start of t1S. The
fault may evolve into another phase. At such an evolving fault, the protec-
tion must issue a three-phase trip for the second trip.
When the AR01-TPTRIP appears, the t1S-timer is stopped and the timer
for t1, the three-phase AR open time, starts.
2.3.6 AR01-P3PH, Prepare
three-phase trip
This output signal ensures that a possible coming trip operation is a three-
phase operation. This is, for example, the case if the AR is set off, or
blocked, or if it has made the first reclosing shot.
Normally the signal is reset when the reclaim time after a reclosing has
expired, and the function is once more ready for a single-phase reclosing
Permit single-phase trip. It is the inverse of P3PH and should be con-
nected to a binary output relay. Should the unit with the auto-reclosing be
inoperative, single-phase trip is thus not released. The external circuit can
be connected to a make or break contact of an output relay depending on
what is required: Permit single-phase or Prepare three-phase trip.
2.3.7 Blocking of a new
reclosing cycle
A new start of a reclosing cycle is blocked for the reclaim time after the
selected number of reclosing shots are made.
2.3.8 Reclosing checks
and Reclaim timer
An AR open time time-out signal is received from a program module.
At three-phase reclosing, a synchro-check and/or energizing check, or
voltage check, can be used. You can use an internal or an external syn-
chro-check function, configured to AR01-SYNC.
If reclosing without check is preferred, configure the input AR01-SYNC
to FIXD-ON (set to 1).
high,
the timer for three-phase AR open time, t1, is started (instead of
t1S) and AR01-TP1 is set (auto-reclosing three-phase, shot 1, in
progress). While either t1S or t1 is running, the output AR01-
INPROGR is activated.