Application Possibility With One-Phase Reb670 - ABB REB670 Applications Manual

1MRK 505 337-UUS -
17.1.2.2
Application manual

Application possibility with one-phase REB670

For busbar protection applications in substations where dynamic zone selection is
required, it is typically necessary to wire the normally open and normally closed auxiliary
contacts from every monitored disconnector and/or circuit breaker to the optocoupler
inputs of the busbar protection. When one phase version of REB670 is used, then six
optocoupler inputs (that is, two in each phase/IED) are required for every primary
switchgear object. For big stations (for example, with 24 bays) this will require quite a lot
of binary inputs into every IED. To limit the number of required optocoupler inputs into
every IED it is possible to use LDCM communication modules to effectively share the
binary Ios between three units, as shown in figure 193193.
Wire status of
disconnectors
from Bays 01-08
Wire status of
disconnectors
from Bays 09-16
Wire status of
disconnectors
from Bays 17-24
IEC06000198 V2 EN
Figure 193: Example how to share binary IO between one-phase REB670 IEDs by
using LDCM modules
As shown in figure 193, it is possible to wire only the status for bays 01-08 to A phase-
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 B, respectively C phase IED and then
shared to the other two phases via LDCM communication.
REB 670, B31
Phase L1
REB 670, B31
Phase L2
REB 670, B31
Phase L3
Section 17
Remote communication
<= 192 Binary Signals =>
<= 192 Binary Signals =>
<= 192 Binary Signals =>
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