ABB RET670 Applications Manual page 260

Section 3
IED application
254
1
2
60°
8
6
4
3
IEC09000043 V1 EN
Figure 109: Relation between distance protection ZMQPDIS (21) and FDPSPDIS
(21) for phase-to-ground fault φloop>60° (setting parameters in italic)
1 FDPSPDIS (21) (red line)
2 ZMQPDIS(21)
RFltRevPG
3
PHS
X1
4 ( +XN)/tan(60°)
PHS
RFltFwdPG
5
PHS
RFPG
6
ZM
7 X1 +XN
PHS
8 φloop
X1
9 +XN
ZM
Reactive reach
X
W
( / loop)
3 4
6
6
8
6
5
1MRK504116-UUS C
5
7
60°
R
W
( / loop)
7
IEC09000043_1_en.vsd
Application manual