ABB Relion 670 series - Certificate Management Overview; Creating and Deploying IED Certificates

4.6 Configurations with power transformers in the
protected zone
4.6.1 Line differential protection L3CPDIF, L6CPDIF, LT3CPDIF,
LT6CPDIF
4.6.1.1 Power transformers in the protected zone
M12541-6 v7
One three-winding transformer or two two-winding transformers can be included in
the line protection zone. The alternative with one two-winding transformer in the
protected zone is shown in Figure
25 and Figure 26.
IED
IE D
Protected zone
IEC05000442-2-en.vsdx
IEC05000442 V2 EN-US
Figure 25: One two–winding transformer in the protected zone
IED
IED IED
Protected zone
IEC04000209-2-en.vsdx
IEC04000209 V2 EN-US
Figure 26: One two–winding transformer in the protected zone
An alternative with two two-winding transformers in the protected zone is shown
in Figure 27.
Section 4 1MRK 505 382-UEN B
Analog and binary signal transfer for line differential protection
36 Communication set-up 670/650 series 2.2
Application Guide