ABB REB670 Applications Manual page 324

Section 12
Control
318
IOM
INPUT
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PROTECTION
OR
xxxx-TRIP
ZCVPSOF-TRIP
OR
ZMQPDIS (21)--TRIP
SESRSYN (25)-AUTOOK
ANSI04000135 V2 EN
Figure 118: Example of I/O-signal connections at a three-phase reclosing function
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. Please
refer to figure 120. In a single breaker arrangement the setting is Priority = None. In a
multi-breaker arrangement the setting for the first CB, the Master, is Priority = High and
for the other CB Priority = Low.
While the reclosing of the master is in progress, it issues the signal WFMASTER. A reset
delay of one second ensures that the WAIT signal is kept high for the duration of the
breaker closing time. After an unsuccessful reclosing it is also maintained by the signal
UNSUCCL. In the slave unit, the signal WAIT holds back a reclosing operation. When the
WAIT signal is reset at the time of a successful reclosing of the first CB, the slave unit is
released to continue the reclosing sequence. A parameter tWait sets a maximum waiting
time for the reset of the WAIT. At time-out it interrupts the reclosing cycle of the slave
unit. If reclosing of the first breaker is unsuccessful, the output signal UNSUCCL
connected to the input INHIBIT of the slave unit interrupts the reclosing sequence of the
latter.
The signals can be cross-connected to allow simple changing of the
priority by just setting the High and the Low priorities without changing
SMBRREC (79)
BLOCKED
ON
OFF SETON
F INPROGR
BLKON
T
ACTIVE
BLOCKOFF
INHIBIT UNSUCCL
SUCCL
CBREADY
52a
CLOSECMD
PLCLOST
F
RESET PERMIT1P
PREP3P
READY
RI
F
RI_HS 1PT1
F
SKIPHS 2PT1
3PT1
TRSOTF
3PT2
3PT3
F
THOLHOLD
3PT4
F
TR2P
3PT5
T
TR3P
SYNC
F
WAIT
F
RSTCOUNT
WFMASTER
ANSI04000135_2_en.vsd
1MRK 505 337-UUS -
IOM
OUTPUT
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Application manual