ABB REL670 - Page 98

90
Distance protection Chapter 11
Verifying settings by secondary
injection
Figure 30: Phase selection characteristic for three phase faults.
90 deg
(Ohm/phase)
X
1
2
3
4
5
9
10
30
6
7
8
ArgNegRes
ArgDir
ArgLd
X1
30
1
3
2
X⋅
11
0.2•RLdFw
0.8•RLdFw
0.5•RFFwPE
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