ABB RET670 Commissioning Manual page 132

Section 11
Testing functionality by secondary injection
126
4
X +
( 1 XN )
50% of RLdFw
IEC09000734 V4 EN-US
Figure 31: Operating characteristic for phase selection function, forward
direction single-phase faults
4
X1
50% RLdFw
IEC09000735 V3 EN-US
Figure 32: Operating characteristic for phase selection function, forward
direction phase-to-phase faults
W
( / loop
)
X
1
85%
5
ArgNegRes
2
7
6
RFFwPE
W
( / phase )
X
1
85%
5
ArgNegRes
2
7
6
ArgDir
0.5·RFFwPP
1MRK 504 165-UEN A
3
60°
W
( / loop
R
IEC09000734-4-en.vsd
3
ArgLd
60°
W
( / phase
R
IEC09000735-3-en.vsd
Transformer protection RET670 2.2 IEC
Commissioning manual
)
)