ABB REL670 - Page 102

94
Distance protection Chapter 11
Verifying settings by secondary
injection
The table showing test points for phase to phase loops is used together with figure 29.
8 X=0.2·RLdFw·tan(ArgDir)
R=0.2·RLdFw
9 X=0.2·X1
10 X=0.85·X1set
11 X=0.2·X1
12 X=0
R=0.5·RFFwPP
Note! This test points is proposed to be used instead of
point 4, 5 and 6 when shaped load characteristic is not
activated
(OperationLdCmd=OFF)
Test point Value Comments
X 0.054
R
LdFw
≈
−⋅
0.2 1
tan( 90)
X
R
ArgNegDir
⋅
=
−
R0.4321X
≈
⋅
0.8 1
tan( 90)
X
R
ArgNegDir
⋅
=
−
R 1,727 1X
≈
⋅
0.2 1
tan(60 )
X
R
⋅
=
°
R0.346 1Xset
≈
⋅