ABB REB670 Series, Applications Manual

Page: 279 / 476

CLOSE COMMAND
OR
SMBRREC
OR
CCRBRF
BU-TRIP
ZCVPSOF-TRIP
INHIBI T
UNSUCCL
TRBU
SMPPTRC
AND
RESET LOCK-OUT
OR
OR
SESRSYN
Functional key,
SOFTWARE
OR IO RESET
MANSYOK
MAN CLOSE
SMBRREC CLO SE
CLLKOUT
RSTLKOUT
SETLKO UT
IEC05 000 316-4-en.vsdx
SMBO
MANENOK
IEC05000316-WMF V4 EN-US
Figure 133: Lock-out arranged with internal logic with manual closing going through in
IED
12.2.2.20 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 (SMPPTRC) in
the IED has an evolving fault timer which ensures that the second fault is always tripped three-
phase. For other types of relays where the relays do not include this function, the
PREP3PH
output (or the inverted
PERMIT1PH output) is used to prepare the other sub-system for three-
phase tripping. This signal will, for evolving fault situations, be activated a short time after the
first trip has reset and will thus ensure that new starts (trips) will be three phase.
12.2.2.21 Automatic continuation of the auto reclosing sequence
M12391-223 v5
The auto recloser can be programmed to proceed to the next auto reclosing shots (if multiple
shots are selected) even if start signals are not received from protection functions, but the
circuit breaker is still not closed. This is done by setting AutoCont = On and tAutoContWait to
the required delay for the function to proceed without a new start.
12.2.2.22 Thermal overload protection holding the auto recloser back
M12391-226 v3
If the
THOLHOLD input (thermal overload protection holding auto reclosing back) is activated,
it will keep the auto recloser on a hold until it is reset. There may thus be a considerable delay
between start of the auto recloser and the breaker closing command to the circuit breaker. An
external logic limiting the time and sending an inhibit to the
INHIBIT input can be used. The
input can also be used to set the auto recloser on hold for a longer or shorter period.
1MRK 505 370-UEN D Section 12
Control
Busbar protection REB670 273
Application manual