ABB Relion REC670 - Page 258

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 the
configuration. The inputs CBPOS for each breaker are important in multi
breaker arrangements to ensure that the CB was closed at the beginning of the
cycle. If the High priority breaker is not closed the High priority moves to the
low priority breaker.
ON
OFF
BLKON
BLOCKOFF
INHIBIT
BLOCKED
SETON
INPROGR
ACTIVE
UNSUCCL
SUCCL
CLOSECB
PERMIT1P
CBREADY
CBPOS
PLCLOST
3PT1
WFMASTER
RESET
START
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--TRIP
TRIP-TR2P
TRIP-TR3P
SESRSYN-AUTOOK
EF4PTOC-BLOCK
IOM IOM
SMBRREC
IEC04000136_3_en.vsd
xx
xx
xx
xx
xx
xx
xx
xx
xx
STARTHS
SKIPHS
F
F
THOLHOLD
F
WAIT
RSTCOUNT
F
F
3PT2
3PT3
3PT4
3PT5
F
T
F
READY
PREP3P
TRIP-P3PTR
IEC04000136 V3 EN-US
Figure 102: Example of I/O-signal connections in a single-phase, two-phase or three-
phase reclosing function
Section 13 1MRK 511 358-UEN A
Control
252
Application manual