ABB REC650 Technical Manual page 239

1MRK 511 287-UEN A
Technical manual
pulse
initiate
3PT1
3PT2
3PT3
3PT4
3PT5
RSTCOUNT
IEC08000245 V1 EN
Figure 105: Pulsing of closing command and driving the operation counters
Transient fault
After the reclosing command the reclaim timer tReclaim starts running for the set
time. If no tripping occurs within this time, the auto-reclosing will reset.
Permanent fault and reclosing unsuccessful signal
If a new trip occurs after the CB closing command, and a new input signal START or
TRSOTF appears, the output UNSUCCL (unsuccessful closing) is set high. The
timers for the first shot can no longer be started. Depending on the setting for the
number of reclosing shots, further shots may be made or the reclosing sequence will
be ended. After the reclaim time has elapsed, the auto-reclosing function resets but the
CB remains open. The CB closed data at the CBPOS input will be missing. Because
of this, the reclosing function will not be ready for a new reclosing cycle.
Normally the signal UNSUCCL appears when a new trip and start is received after the
last reclosing shot has been made and the auto-reclosing function is blocked. The
signal resets once the reclaim time has elapsed. The "unsuccessful" signal can also be
made to depend on CB position input. The parameter UnsucClByCBChk should then
be set to CBCheck, and a timer tUnsucCl should also be set. If the CB does not respond
to the closing command and does not close, but remains open, the output UNSUCCL
is set high after time tUnsucCl.
AND
AND
counter
AND
counter
AND
counter
AND
counter
AND
counter
counter
Section 10
Control
CLOSECB
COUNT3P1
COUNT3P2
COUNT3P3
COUNT3P4
COUNT3P5
COUNTAR
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