ANSI04000136-3-en.vsd
ON
OFF
BLKON
BLKOFF
INHIBIT
BLOCKED
SETON
INPROGR
ACTIVE
UNSUCCL
SUCCL
CLOSECB
PERMIT1P
3PT1
WFMASTER
RESET
1PT1
2PT1
TRSOTF
TR2P
TR3P
SYNC
INPUT
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
OR
OR
OUTPUT
xx
OR
PROTECTION
xxxx-TRIP
ZCVPSOF-TRIP
ZMQPDIS (21)-TRIP
TRIP-TR2P
TRIP-TR3P
SESRSYN (25)-AUTOOK
IOM IOM
SMBRREC (79)
xx
xx
xx
xx
xx
xx
xx
xx
xx
SKIPHS
THOLHOLD
WAIT
RSTCOUNT
3PT2
3PT3
3PT4
3PT5
READY
PREP3P
TRIP-P3PTR
CBREADY
52a
PLCLOST
RI_HS
RI
GROUND RELAYS
BLOCK
ANSI04000136 V3 EN
Figure 312: Example of I/O-signal connections for a single-phase, two-phase or
three-phase auto reclosing sequence
Setting recommendations for multi-breaker arrangements
Sequential reclosing in multi-breaker arrangements, like breaker-and-a-half, double
breaker and ring bus, is achieved by giving the two line breakers different priorities. Refer
to figure 313. 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
1MRK 506 369-UUS - Section 15
Control
Line distance protection REL670 2.2 ANSI 673
Application manual
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