ABB Relion 670 Series Commissioning Manual page 122

Section 11
Testing functionality by secondary injection
X1
ANSI09000735 V1 EN-US
Figure 32: Operating characteristic for phase selection function, forward direction phase-
Table 28: Test points for phase-to-ground loop CG (Ohm/loop)
Test point
1
2
3
4
5
6
The table showing test points for phase-to-ground loops is used together with figure 31.
116
W
( /
X
1
4
85%
ArgNegRes
6
50% RLdFwd
0.5·RFltFwdPP
to-phase faults
Value
X [X1+XN]
R 0
X 0
R RLdFwd
X 0.85·[X1+XN]
R 0.85·[X1+XN]·1/tan(60°)+RFFwPE
X 0.85·[X1+XN]
R -0.85·[X1+XN]·
tan (AngNegRes-90°)
X RFltFwdPG·tan (LdAngle)
R RFltFwdPG
X -0,5·RLdFwd·tan (ArgDir)
R 0,5·RLdFwd
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phase )
3
LdAngle
5
60°
2
R
7
ArgDir
ANSI09000735-1-en.vsd
Comments
XN=(X -X
0
R≈0.491·(X1+XN)+RFFwPE
1MRK 506 371-UUS E
W
( / phase )
)/3
1
Line distance protection REL670
Commissioning manual