ABB Relion REC670 Applications Manual page 257

1MRK 511 358-UEN A
PREP3P
Prepare three-phase trip is usually connected to the trip block to force a coming trip to be a
three-phase one. If the function cannot make a single-phase or two-phase reclosing, the
tripping should be three-phase.
PERMIT1P
Permit single-phase trip is the inverse of PREP3P. It can be connected to a binary output relay
for connection to external protection or trip relays. In case of a total loss of auxiliary power,
the output relay drops and does not allow single-phase trip.
WFMASTER
Wait from master is used in high priority units to hold back reclosing of the low priority unit
during sequential reclosing. Refer to the recommendation for multi-breaker arrangements in
figure 103.
Other outputs
The other outputs can be connected for indication, disturbance recording, as required.
PROTECTION
xxxx-TRIP
ZCVPSOF-TRIP
ZMFPDIS-TRIP
SESRSYN-AUTOOK
IEC04000135 V4 EN-US
Figure 101: 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 1 1/2-breaker, double breaker and ring
bus, is achieved by giving the two line breakers different priorities. Please refer to figure 103.
In a single breaker arrangement the setting is
the setting for the first CB, the Master, is
Application manual
IOM
INPUT
xx ON
xx
OFF
F
xx
BLKON
T
xx
BLOCKOFF
xx
INHIBIT
xx
xx
CBREADY
xx
CBPOS
xx
PLCLOST
xx
F
RESET
OR START
F
STARTHS
F
SKIPHS
OR TRSOTF
F
THOLHOLD
F
TR2P
T
TR3P
SYNC
F
WAIT
F
RSTCOUNT
SMBRREC
BLOCKED
SETON
INPROGR
ACTIVE
UNSUCCL
SUCCL
CLOSECB
PERMIT1P
PREP3P
READY
1PT1
2PT1
3PT1
3PT2
3PT3
3PT4
3PT5
WFMASTER
Priority = None . In a multi-breaker arrangement
Priority = High and for the other CB Priority = Low .
Section 13
Control
IOM
OUTPUT
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
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