X
R
ArgDir
ArgNegRes
ZPP
ZRevPP
VAB
ϕ
IAB
en06000469_ansi.ep
ANSI06000469 V1 EN-US
Figure 102: Operation characteristic for reverse phase A-to-B fault
Phase-to-ground fault
SEMOD154224-283 v2
Mho
SEMOD154224-120 v5
The measuring of ground faults uses ground-return compensation applied in a conventional way.
The compensation voltage is derived by considering the influence from the ground-return path.
For a ground fault in phase A, the compensation voltage Vcomp can be derived, as shown in Figure
103.
Section 7 1MRK 502 066-UUS B
Impedance protection
226
Technical manual
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