ABB Relion 670 Series REL670, Commissioning Manual

Page: 112 / 270

Table 25: Test points for phase-to-earth loop L3-E (Ohm/loop)
Test point Value Comments
1 X [X1+XN] XN=(X
0
-X
1
)/3
R 0
2 X 0
R RLdFw
3 X 0.85·[X1+XN] R≈0.491·(X1+XN)+RFFwPE
R 0.85·[X1+XN]·1/tan(60°)+RFFwPE
4 X 0.85·[X1+XN]
R -0.85·[X1+XN]·
tan (AngNegRes-90°)
5 X RFFwPE·tan (ArgLd)
R RFFwPE
6 X -0.5·RLdFw·tan (ArgDir)
R 0.5·RLdFw
The table showing test points for phase-to-earth loops is used together with figure 22 .
Table 26: Test points for phase-to-phase loops L1–L2
Test point Value Comments
1 X X1
R 0
2 X 0
R RLdFw
3 X 0.85·X1 R=0.491·X1+0.5 RFFwPP
R 0.85·X1·1/tan(60°)+0.5 RFFwPP
4 X 0.85·X1
R -0.85·X1·tan (AngNegRes-90°)
5 X 0.5·RFFwPP·tan (ArgLd)
R 0.5·RFFwPP
6 X -0.5·RLdFw·tan (ArgDir)
R 0.5·RLdFw
The table showing test points for phase-to-phase loops is used together with figure 23 .
10.4.6.1 Measuring the operating limit of set values
Procedure:
Section 10
1MRK 506 355-UEN A
Testing functionality by secondary injection
106 Line distance protection REL670 2.1 IEC
Commissioning manual