Evolving Fault - ABB REC670 Applications Manual

Section 14
Control
14.2.2.20
312
BU-TRIP
OR INHIBIT
ZCVPSOF-TRIP
CCRBRF
TRBU
IEC05000315-WMF V4 EN-US
Figure 115: Lock-out arranged with an external lock-out relay
SMBRREC
BU-TRIP
OR INHIBIT
ZCVPSOF-TRIP
UNSUCCL
Functional key,
CCRBRF
SOFTWARE
OR IO RESET
TRBU
MAN CLOSE
SMBRREC CLOSE
SESRSYN
MANENOK
MANSYOK
IEC05000316-WMF V4 EN-US
Figure 116: 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-phase tripping
and then the fault spreads to another phase. The second fault is then cleared by
three-phase tripping.
The auto recloser will first receive a start signal (START) without any three-phase
signal (TR3P). The auto recloser will start a single-phase auto reclosing sequence,
if programmed to do so. At the evolving fault clearance there will be a new START
signal and three-phase trip information, TR3P. The single-phase auto reclosing
sequence will then be stopped, and instead the timer, t1 3Ph, for three-phase auto
reclosing will be started from zero. The sequence will continue as a three-phase
auto reclosing sequence, if it is a selected alternative reclosing mode. The second
fault which can be single-phase is tripped three-phase because the trip function
SMBRREC
UNSUCCL
OR
SMPPTRC
OR SETLKOUT
CLLKOUT
RESET LOCK-OUT
RSTLKOUT
OR
OR
1MRK 511 401-UEN A
SMBO
Lock-out
RXMD1
11
21
12
MAIN ZAK CLOSE CLOSE COMMAND
IEC05000315-4-en.vsd
SMBO
AND
CLOSE COMMAND
IEC05 000 316-4-en.vsdx
Bay control REC670 2.2 IEC
Application manual
M12391-217 v4