ABB Relion 670 Series Commissioning Manual page 126

Section 11
Testing functionality by secondary injection
X +
( 1
IEC09000734 V4 EN-US
Figure 33: Operating characteristic for phase selection function, forward direction
IEC09000735 V3 EN-US
Figure 34: Operating characteristic for phase selection function, forward direction
Table 28: Test points for phase-to-earth loop L3-E (Ohm/loop)
Test point
1
2
Table continues on next page
120
1
4
85%
XN )
ArgNegRes
50% of RLdFw
single-phase faults
X
1
4 85%
X1
ArgNegRes
50% RLdFw
0.5·RFFwPP
phase-to-phase faults
Value
X [X1+XN]
R 0
X 0
R RLdFw
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W
( / loop )
X
5
60°
2
7
6
RFFwPE
W
( / phase )
5
60°
2
7
6
ArgDir
Comments
XN=(X
3
W
( / loop
)
R
IEC09000734-4-en.vsd
3
ArgLd
W
( / phase )
R
IEC09000735-3-en.vsd
-X )/3
0 1
Transformer protection RET670
Commissioning manual
1MRK 504 165-UEN E