ABB REB670 Series - Setting guidelines

<= 192 Binary Signals =>
L
D
C
M
#
1
L
D
C
M
#
2
L
D
C
M
#
1
L
D
C
M
#
2
L
D
C
M
#
1
L
D
C
M
#
2
REB 670, B31
Phase L1
<= 192 Binary Signals =>
<= 192 Binary Signals =>
Wire status of
disconnectors
from Bays 01-08
Wire status of
disconnectors
from Bays 09-16
Wire status of
disconnectors
from Bays 17-24
REB 670, B31
Phase L2
REB 670, B31
Phase L3
en06000198.vsd
IEC06000198 V2 EN-US
Figure 227: Example how to share binary IO between one-phase REB670 IEDs by using
LDCM modules
As shown in figure 227, it is possible to wire only the status for bays 01-08 to L1-IED. After that
the information about auxiliary contact status for switchgear objects from these eight bays
can be sent via LDCM modules to other two phases. In the similar way information from other
bays can be only wired to L2, respectively L3 phase IED and then shared to the other two
phases via LDCM communication.
Typical LDCM communication delay between two IEDs is in order of 30-40 ms. Note that for
disconnector status this delay will not pose any practical problems. However, time delay
caused by LDCM communication can be crucial for circuit breakers status. In such cases it is
strongly recommended that at least the circuit breaker closing command from every circuit
breaker is directly wired to all three phases/IEDs to minimize any risk for unwanted operation
of the busbar differential protection zones due to late inclusion of respective bay current into
the differential measuring circuit.
18.1.3 Setting guidelines
M12454-3 v7
64 kbit and 2 Mbit mode common settings
ChannelMode defines how an IED discards the LDCM information when one of the IEDs in the
system is out of service: it can either be done on the IED out of service by setting all local
LDCMs to channel mode
OutOfService or at the remote end by setting the corresponding
LDCM to channel mode Blocked . If OutOfService is selected, the IED should have active
communication to the remote end during the whole maintenance process, that is, no restart or
removal of the fiber can be done.
This setting does not apply to two-end communication.
Blocked
IED does not use data from the LDCM
Section 18 1MRK 505 370-UEN D
Remote communication
422 Busbar protection REB670
Application manual