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 307: 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 308: Lock-out arranged with internal logic with manual closing going
through in IED
15.2.2.20 Evolving fault
M12391-217 v4
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
Section 15 1MRK 506 369-UEN B
Control
624 Line distance protection REL670 2.2 IEC
Application manual
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