ABB RELION RET670 - Setting Guidelines

R1Zm
X1Zm
X1Zm
0.5*RFPPZm
R1Zm
0.5*RFPPZM
0.5*RFPPZm
0.5*RFPPPm
0.5*RFPPZm
R
70
j
)phase/( W
70
j
PHS
Zm
0.5 RFFwdPP×
0.5 ReRF vPP×
0.5 ReRF vPP×
0.5*RFPPZm
ANSI08000249-1-
en.vsd
tan 70°
1X
PHS
tan 70°
1X
PHS
X1
R1PP=
R1PP=
X
)phase/( W
ANSI08000249 V1 EN-US
Figure 168: Relation between measuring zone and FRPSPDIS (21) characteristic
for phase-to-phase fault for φline>70° (setting parameters in italic)
8.10.4 Setting guidelines
IP14959-1 v2
The following setting guideline consider normal overhead lines applications where
φloop and φline is greater than 60°.
1MRK 504 163-UUS A Section 8
Impedance protection
Transformer protection RET670 2.2 ANSI 357
Application manual