ABB Relion REC670 Applications Manual page 258

Section 13
Control
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
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.
PROTECTION
xxxx-TRIP
ZCVPSOF-TRIP
ZMQPDIS--TRIP
TRIP-TR2P
TRIP-TR3P
SESRSYN-AUTOOK
IEC04000136 V3 EN-US
Figure 102: Example of I/O-signal connections in a single-phase, two-phase or three-
252
tWait sets a maximum waiting time for the reset of the WAIT.
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.
IOM
INPUT
xx
ON
xx
OFF
F
xx
BLKON
T
xx
BLOCKOFF
xx INHIBIT
xx
xx
CBREADY
xx
CBPOS
xx
PLCLOST
xx
F
RESET
START
OR
F
STARTHS
F
SKIPHS
TRSOTF
OR
F
THOLHOLD
TR2P
TR3P
SYNC
F
WAIT
F
RSTCOUNT
phase reclosing function
SMBRREC
BLOCKED
SETON
INPROGR
ACTIVE
UNSUCCL
SUCCL
CLOSECB
PERMIT1P
PREP3P
READY
1PT1
2PT1
3PT1
3PT2
3PT3
3PT4
3PT5
WFMASTER
1MRK 511 358-UEN A
IOM
OUTPUT
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
TRIP-P3PTR
EF4PTOC-BLOCK
OR
IEC04000136_3_en.vsd
Application manual