ABB RED670 Commissioning Manual page 113

1MRK 505 378-UUS Rev. J
Table 23:
Test point
1
2
3
4
5
6
Table 23
X1
ANSI09000735 V1 EN-US
Figure 26:
Line differential protection RED670
Commissioning manual
Test points for phase-to-ground loop CG (Ohm/loop)
Reach Value
X [X1+XN]
R 0
X 0
R RLdFwd
R RFltFwPG
X 0.85·[X1+XN]
R
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
is used together with figure 25.
(
X
1
4 85%
ArgNegRes
6
50% RLdFwd
0.5·RFltFwdPP
Operating characteristic for phase selection function, forward direction phase-to-phase
faults
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Comments
XN=(X
When RLdFWd < RFltFwPG
When RLdFwdPG > RFltFwPG
R≈0.491·(X1+XN)+RFltFwdPG
Can be limited by RFltFwPG
Only when RLdFwd < RFltFwPG
W
/ phase )
3
LdAngle
5
60°
2
7
ArgDir
ANSI09000735-1-en.vsd
Testing functionality by secondary injection
-X )/3
0 1
W
( / phase )
R
Section 11
107