Section 20 Remote Communication; Binary Signal Transfer; Identification; Application - ABB RELION 670 Series Applications Manual

1MRK 504 152-UEN B
Section 20
20.1

Binary signal transfer

20.1.1

Identification

Function description
20.1.2

Application

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.
20.1.2.1

Communication hardware solutions

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 395. The protocol used is
IEEE/ANSI C37.94. The distance with this solution is typical 110 km.
IEC06000519 V2 EN-US
Figure 395: Direct fiber optical connection between two IEDs with LDCM
The LDCM can also be used together with an external optical to galvanic G.703 converter or
with an alternative external optical to galvanic X.21 converter as shown in figure 396. These
Application manual
Remote communication
Binary signal transfer
Binary signal transfer
IEC 61850 IEC 60617
identification identification
BinSignReceive -
BinSignTransm -
Section 20
Remote communication
ANSI/IEEE C37.2
device number
-
-
M12844-11 v4
en06000519-2.vsd
IP12423-1 v2
M14849-1 v2
IP16245-1 v1
M12844-3 v3
691