ABB REL670 2.2 IEC - Page 210

R
X
60°
60°
1
2
3
5
6
6
6
6
7
7
8
8
4
IEC09000043_1_en.vsd
W( / loop)
W( / loop)
4
3 5
IEC09000043 V1 EN-US
Figure 104: Relation between distance protection phase selection (FDPSPDIS)
and impedance zone (ZMQPDIS) for phase-to-earth fault
φloop>60° (setting parameters in italic)
1
FDPSPDIS (phase selection)(red line)
2 ZMQPDIS (Impedance protection zone)
3 RFltRevPG
PHS
4 ( X1
PHS
+XN)/tan(60°)
5 RFltFwdPG
PHS
6 RFPG
ZM
7 X1
PHS
+XN
8 φloop
9 X1
ZM
+XN
Section 8 1MRK 506 369-UEN B
Impedance protection
204 Line distance protection REL670 2.2 IEC
Application manual