ABB Relion 670 Series Applications Manual page 304

Section 14
Control
14.2.2.16 Pulsing of the circuit breaker closing command and counter
The circuit breaker closing command,
tPulse setting. For circuit breakers without an anti-pumping function, close pulse cutting can be
used. It is selected by the
command pulse is then cut (interrupted). The minimum breaker closing command pulse length is
always 50ms. At the issue of the breaker closing command, the appropriate auto recloser
operation counter is incremented. There is a counter for each type of auto reclosing command and
one for the total number of auto reclosing commands.
14.2.2.17 Transient fault
After the breaker closing command the reclaim timer keeps running for the set
start (trip) occurs within this time, the auto recloser will reset. The circuit breaker remains closed
and the operating gear recharges. The
14.2.2.18 Permanent fault and reclosing unsuccessful signal
If a new start occurs, and the number of auto reclosing shots is set to 1, and a new
TRSOTF input signal appears, after the circuit breaker closing command, the UNSUCCL output
(unsuccessful reclosing) is set high. The timer for the first shot can no longer be started.
Depending on the set number of auto reclosing shots further shots may be made or the auto
reclosing sequence is ended. After reclaim timer time-out the auto recloser resets, but the circuit
breaker remains open. The circuit breaker closed information through the
missing. Thus, the auto recloser is not ready for a new auto reclosing cycle. Normally, the
UNSUCCL output appears when a new start is received after the last auto reclosing shot has been
made and the auto recloser is inhibited. The output signal resets after reclaim time. The
"unsuccessful" signal can also be made to depend on the circuit breaker position input. The
UnsucClByCBChk setting should then be set to CBCheck , and the tUnsucCl timer should be set too.
If the circuit breaker does not respond to the breaker closing command and does not close, but
remains open, the
can for example, be used in multi-breaker arrangement to cancel the auto reclosing for the second
circuit breaker, if the first circuit breaker closed onto a persistent fault. It can also be used to
generate a lock-out of manual circuit breaker closing until the operator has reset the lock-out, see
separate section.
14.2.2.19 Lock-out initiation
In many cases there is a requirement that a lock-out is generated when the auto reclosing attempt
fails. This is done with logic connected to the in- and outputs of the auto recloser and connected
to binary I/O as required. Many alternative ways of performing the logic exist depending on
whether manual circuit breaker closing is interlocked in the IED, whether an external physical lock-
out relay exists and whether the reset is hardwired, or carried out by means of communication.
There are also different alternatives regarding what shall generate lock-out. Examples of
questions are:
• shall back-up time delayed trip give lock-out (normally yes)
• shall lock-out be generated when closing onto a fault (mostly)
• shall lock-out be generated when the auto recloser is Off at the fault or for example, in single-
phase auto recloser mode and the fault was multi-phase (normally not as no closing attempt
has been given)
• shall lock-out be generated if the circuit breaker did not have sufficient operating power for
an auto reclosing sequence (normally not as no auto closing attempt has been given)
298
CLOSECB is given as a pulse with a duration set by the
CutPulse setting. In case of a new start pulse (trip), the breaker closing
CBCLOSED and CBREADY input signals will be set.
UNSUCCL output is set high after the set tUnsucCl time. The UNSUCCL output
© Copyright 2017 ABB. All rights reserved
1MRK 511 401-UUS F
M12391-205 v4
M12391-208 v4
tReclaim time. If no
M12391-211 v5
START or
CBCLOSED input is
M12391-214 v8
Bay control REC670
Application manual