RED
670
RED
670
RED
670
Protected zone
en04000209.vsd
IEC04000209 V1 EN-US
Figure 58: One two–winding transformer in the protected zone
An alternative with two two-winding transformers in the protected zone is shown in figure
.
RED
670
RED
670
RED
670
Protected zone
RED
670
A
B
en04000210.vsd
IEC04000210 V1 EN-US
Figure 59: Two two–winding transformers in the protected zone
An alternative with one three-winding transformer in the protected zone is shown in figure
Observe that in this case, the three-winding power transformer is seen by the differential
protection as two separate power transformers, A and B, which have one common winding on
the HV side.
RED
670
RED
670
RED
670
Protected zone
A
B
en04000211.vsd
IEC04000211 V1 EN-US
Figure 60: One three–winding transformer in the protected zone
Section 6
1MRK 505 343-UEN B
Differential protection
130
Application manual
Содержание Relion 670 series
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