ABB REL650 - Page 150

R
X
60°
60°
1
2
3
5
4
6
6
6
6
6
6
7
7
W( / phase)
IEC09000257_1_en.vsd
W( / phase)
5
3
8
4
8
IEC09000257 V1 EN
Figure 68: Relation between distance protection (ZQMPDIS) (21) and FDPSPDIS
(21) characteristic for phase-to-phase fault for φline>60° (setting
parameters in italic)
1
FDPSPDIS (21)(red line)
2 ZQMPDIS(21)
3 0.5 ·
4
( )
60tan °
PHS
X1
5 0.5 ·
6 0.5 · RFPP
Zm
7 X1
PHS
Section 6 1MRK 506 334-UUS A
Impedance protection
144
Application manual