ABB RER670 - Page 235

• 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
• 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)
In Figures
71 and 72 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 synchrocheck function. An
example of lock-out logic.
Lock-out
RXMD1
11
12
21
MAIN ZAK CLOSE
CLOSE COMMAND
SMBO
OR
SMBRREC
OR
CCRBRF
BU-TRIP
ZCVPSOF-TRIP
INHIBIT
UNSUCCL
TRBU
IEC05000315-4-en.vsd
IEC05000315-WMF V4 EN-US
Figure 71: Lock-out arranged with an external lock-out relay
CLOSE COMMAND
OR
SMBRREC
OR
CCRBRF
BU-TRIP
ZCVPSOF-TRIP
INHIBIT
UNSUCCL
TRBU
SMPPTRC
AND
RESET LOCK-OUT
OR
OR
SESRSYN
Functional key,
SOFTWARE
OR IO RESET
MANSYOK
MAN CLOSE
SMBRREC CLOSE
CLLKOUT
RSTLKOUT
SETLKOUT
IEC05000316-4-en.vsdx
SMBO
MANENOK
IEC05000316-WMF V4 EN-US
Figure 72: Lock-out arranged with internal logic with manual closing going
through in IED
1MRK 506 375-UEN A Section 12
Control
Railway application RER670 2.2 IEC 229
Application manual