• 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 generated when the Auto-Recloser was OFF at the fault
• Shall Lock-out be generated if the Breaker did not have sufficient operating
power for an Auto-Reclosing sequence (normally not as no closing attempt has
been given)
In figure
91 and figure 92 the logic shows how a closing Lock-out logic can be
designed with the Lock-out relay as an external relay alternatively with the Lock-out
created internally with the Manual closing going through the Synchro-check function.
Lock-out arranged with an external Lock-out relay.
Lock-out
RXMD1
11
12
21
MAIN ZAK CLOSE
CLOSE COMMAND
SMBO
OR
STBRREC
OR
CCRBRF
BJ-TRIP
ZCVPSOF-TRIP
INHIBIT
UNSUCCL
TRBU
IEC10000264-1-en.vsd
IEC10000264 V1 EN
Figure 91: Lock-out arranged with an external Lock-out relay
CLOSE COMMAND
OR
STBRREC
OR
CSPBRF
BU-TRIP
ZCVPSOF-TRIP
INHIBIT
UNSUCCL
TRBU
STPPTRC
AND
RESET LOCK-OUT
OR
OR
SESRSYN
SOFTWARE
OR IO RESET
AUTO STOP
MAN ENOK
MAN CLOSE
STBRREC CLOSE
CLLKOUT
RSTLOUT
SETLKOUT
IEC10000265-1-en.vsd
IEC10000265 V1 EN
Figure 92: Lock-out arranged with internal logic with manual closing going
through in IED
Section 10 1MRK 505 291-UEN A
Control
220
Application manual
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