ABB REL670 - Page 91

83
Distance protection Chapter 11
Verifying settings by secondary
injection
Figure 26: Distance protection (ZM) characteristic with test points for phase to phase mea-
surements
Table 15 is used in conjunction with figure 26.
X1
R
X
(Ω /
phase)
50%
80%
1
2
3
4
5
6
7
8
9
10
11
80% of RLdFw
40% of RLdFw
0.5 x RFPP
12
en05000368.vsd
13
a
b
c