ABB RED670 - Page 135

R
X
RFFwPE
1
3
5
2
4
ArgNegRes
85%
50% of RLdFw
6
IEC09000734-4-en.vsd
7
60°
)
/( loopW
)
/( loopW
)1( XNX +
IEC09000734 V4 EN-US
Figure 31: Operating characteristic for phase selection function, forward
direction single-phase faults
X1
R
X
85%
1
3
5
2
6
4
50% RLdFw
ArgNegRes
0.5·RFFwPP
ArgLd
IEC09000735-3-en.vsd
ArgDir
60°
)/( phaseW
)/( phaseW
7
IEC09000735 V3 EN-US
Figure 32: Operating characteristic for phase selection function, forward
direction phase-to-phase faults
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 129
Commissioning manual