ABB RED670 Commissioning Manual page 123

1MRK 505 378-UUS Rev. J
Table 29:
Test point
1
2
3
4
5
6
The table showing test points for phase-to-ground loops is used together with figure 31.
Table 30:
Test point
1
2
3
4
5
6
The table showing test points for phase-to-phase loops is used together with figure 32.
11.4.6.1 Measuring the operating limit of set values
Procedure:
Line differential protection RED670
Commissioning manual
Test points for phase-to-ground loop CG (Ohm/loop)
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
Test points for phase-to-phase loops A-B
Value
X X1
R 0
X 0
R RLdFwd
X 0.85·X1
R 0.85·X1·1/tan(60°)+0.5
RFLdFwdPP
X 0.85·X1
R -0.85·X1·tan (AngNegRes-90°)
X 0.5·RFLdFwdPP·tan (ArgLd)
R 0.5·RFLdFwdPP
X -0.5·RLdFwd·tan (ArgDir)
R 0.5·RLdFwd
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Testing functionality by secondary injection
Comments
XN=(X -X )/3
0 1
R≈0.491·(X1+XN)+RFFwPE
Comments
R=0.491·X1+0.5 RFLdFwdPP
GUID-B1B7DEB6-7BC3-4A90-8D8F-E4E69B434AFA v3
Section 11
117