ON
OFF
BLKON
BLKOFF
INHIBIT
BLOCKED
SETON
INPROGR
ACTIVE
UNSUCCL
SUCCL
CLOSECB
PERMIT1P
CBREADY
CBCLOSED
PLCLOST
3PT1
WFM ASTER
RESET
ST ART
1PT1
2PT1
TRSOTF
TR2P
TR3P
SYNC
INPUT
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
OR
OUTPUT
xx
OR
PROTECTION
xxxx-TRIP
ZCVPSOF-TRIP
TRIP-TR2P
TRIP-TR3P
SESRSYN-AUTOOK
EF4PTOC-BLOCK
BIM BOM
SMBRREC
=IEC04000136=4=en=Original.vsd
xx
xx
xx
xx
xx
xx
xx
xx
xx
STARTHS
SKIPHS
THOLHOLD
WAIT
RSTCOUNT
3PT2
3PT3
3PT4
3PT5
READY
PREP3P
TRIP-P3PTR
IEC04000136 V4 EN-US
Figure 310: Example of I/O-signal connections for a single-phase, two-phase or
three-phase auto reclosing sequence
Setting recommendations for multi-breaker arrangements
M12399-87 v6
Sequential reclosing in multi-breaker arrangements, like 1 1/2-breaker, double
breaker and ring bus, is achieved by giving the two line breakers different
priorities. Refer to figure 311. In a single breaker arrangement the setting is
Priority = None. In a multi-breaker arrangement the setting for the first circuit
breaker, the master, is Priority = High and for the other circuit breaker Priority =
Low.
While the auto reclosing of the master is in progress, it issues the WFMASTER
output. After an unsuccessful reclosing the WFMASTER output is also maintained
by the UNSUCCL signal. When activating the WAIT input, in the auto recloser set
as slave, every dead timer is changed to the value of setting tSlaveDeadTime and
holds back the auto reclosing operation. When the WAIT input is reset at the time of
a successful reclosing of the first circuit breaker, the slave is released to continue
the reclosing sequence after the set tSlaveDeadTime. The reason for shortening the
time, for the normal dead timers with the value of tSlaveDeadTime, is to give the
slave permission to react almost immediately when the WAIT input resets. The
mimimum settable time for tSlaveDeadTime is 0.1sec because both master and
slave should not send the breaker closing command at the same time. The slave
Section 15 1MRK 506 369-UEN B
Control
632 Line distance protection REL670 2.2 IEC
Application manual
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