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Section 20
Remote communication
20.1
Binary signal transfer
IP12423-1 v2
20.1.1
Identification
M14849-1 v2
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Binary signal transfer
BinSignReceive
-
-
Binary signal transfer
BinSignTransm
-
-
20.1.2
Application
IP16245-1 v1
M12844-3 v3
The IEDs can be equipped with communication devices for line differential communication
and/or communication of binary signals between IEDs. The same communication hardware is
used for both purposes.
Communication between two IEDs geographically on different locations is a fundamental part
of the line differential function.
Sending of binary signals between two IEDs, one in each end of a power line is used in
teleprotection schemes and for direct transfer trips. In addition to this, there are application
possibilities, for example, blocking/enabling functionality in the remote substation, changing
setting group in the remote IED depending on the switching situation in the local substation
and so on.
When equipped with a LDCM, a 64 kbit/s communication channel can be connected to the IED,
which will then have the capacity of 192 binary signals to be communicated with a remote IED.
For line differential, the number of binary signals is limited to 8 because the line differential
communication is included in the same telegrams.
20.1.2.1
Communication hardware solutions
M12844-11 v4
The LDCM (Line Data Communication Module) has an optical connection such that two IEDs
can be connected over a direct fiber (multimode), as shown in figure
IEEE/ANSI C37.94. The distance with this solution is typical 110 km.
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
LD
CM
en06000519-2.vsd
IEC06000519 V2 EN-US
Figure 423: Direct fiber optical connection between two IEDs with LDCM
1MRK 505 343-UEN B
Section 20
Remote communication
707
Application manual
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