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-US
Figure 171:
Relation between distance protection (ZMQPDIS) (21) and FDPSPDIS
(21) characteristic for phase-to-phase fault for φline>60° (setting
parameters in italic)
1 FDPSPDIS (phase selection)(21) (red line)
2 ZMQPDIS (Impedance protection zone) (21)
3 0.5 ·
RFltRevPP
PHS
4
( )
60
tan
°
PHS
X1
5 0.5 ·
RFltFwdPP
PHS
6 0.5 ·
RFPP
Zm
7
X1
PHS
1MRK 504 163-UUS A
Section 8
Impedance protection
Transformer protection RET670 2.2 ANSI
365
Application manual
Summary of Contents for RELION RET670
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