ABB REB670 Series, Applications Manual

Page: 285 / 476

ON
OFF
BLKON
BLKOFF
INHIBIT BLOCKED
SETON
INPROGR
ACTIVE
UNSUCCL
SUCCL
CLOSECB
PERMIT1P
CBREADY
CBCLOSED
PLCLOST
3PT1
WFMASTER
RESET
START
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 135: 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 136 . 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 should take the duration of the breaker
closing time of the master into consideration before sending the breaker closing command. A
setting
tWaitForMaster sets a maximum wait time for the WAIT input to reset. If the wait time
expires, the reclosing cycle of the slave is inhibited. If auto reclosing of the first breaker is
unsuccessful, the
UNSUCCL output connected to the INHIBIT input of the slave unit interrupts
the auto reclosing sequence of the latter.
1MRK 505 370-UEN D Section 12
Control
Busbar protection REB670 279
Application manual