Evolving Fault - ABB REB670 Applications Manual

Section 12
Control
12.2.2.20
312
In figures 116 and 117 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. An example of Lock-
out logic.
SMBRREC (79)
BJ-TRIP
OR INHIBIT
ZCVPSOF-TRIP
CCRBRF (50BF)
TRBU
ANSI05000315 V2 EN
Figure 116: Lock-out arranged with an external Lock-out relay
SMBRREC (79)
BJ-TRIP
OR
INHIBIT
ZCVPSOF-TRIP
UNSUCCL
CCRBRF (50BF)
SOFTWARE
OR IO RESET
BJTRIP
MAN CLOSE
SMBRREC (79) CLOSE
SESRSYN (25)
AUTO STOP
MAN ENOK
ANSI05000316 V2 EN
Figure 117: Lock-out arranged with internal logic with manual closing going through
in IED

Evolving fault

An evolving fault starts as a single-phase fault which leads to single-pole tripping and then
the fault spreads to another phase. The second fault is then cleared by three-pole tripping.
UNSUCCL
OR
SMPPTRC (94)
SETLKOUT
OR
CLLOUT
RESET LOCK-OUT
RSTLOUT
OR
OR
1MRK 505 337-UUS -
SMBO
ELECTRICAL RESET
RELAY
Lock-out
RXMD1
11
SET
21
12
RESET
CLOSE COMMAND
MAIN ZAK CLOSE
ANSI05000315_2_en.vsd
SMBO
AND
CLOSE COMMAND
ANSI05000316_2_en.vsd
Application manual