Configuration Of Ldcm Output Signals - ABB RELION 650 Series Applications Manual

1MRK 505 363-UEN A
The configuration of this data flow is made in the SMT tool, as shown in figure 38.
IEC05000533-NEW V2 EN-US
Figure 38: Typical configuration of the analog signals for a three terminal line (example
Figure 38
Notice that there are two LDCMs, each one supporting a duplex connection with a remote line
end. Thus, the same local current is configured to both LDCMs, whilst the received currents
from the LDCMs are configured separately to Line differential protection.
6.2.2.7

Configuration of LDCM output signals

There are a number of signals available from the LDCM that can be connected to the virtual
binary inputs (SMBI) and used internally in the configuration. The signals appear only in the
Signal Matrix tool where they can be mapped to the desired virtual input.
For explanation of the signals, refer to section Remote communication, Binary signal transfer
to remote end in the technical reference manual. The signal name is found in the Object
Properties window by clicking on the input signal number in the Signal Matrix tool. Connect
the signals to the virtual inputs as desired, as shown in figure
Application manual
Pre-processing
showing 670 device)
shows how one IED in a three terminal line differential protection can be configured.
Currents from
A/D
local CT
SMAI L3DPDIF
Line Differential
block function
Section 6
Differential protection
Currents from
remote end 1
LDCM 1
Currents to
remote end 1
Currents from
remote end 2
LDCM 2
Currents to
remote end 2
IEC05000533-2-en.vsd
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