ABB RELION RET670 - Autotransformer Winding, Solidly Grounded

ANSI05000211_3_en.vsd
ANSI05000211 V3 EN-US
Figure 63: Connection of the low impedance Restricted earth-fault function
REFPDIF for a zig-zag grounding transformer
7.3.2.3 Autotransformer winding, solidly grounded
M13048-13 v9
Autotransformers can be protected with the low impedance restricted ground fault
protection function REFPDIF. The complete transformer will then be protected
1MRK 504 163-UUS A Section 7
Differential protection
Transformer protection RET670 2.2 ANSI 179
Application manual