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R1
Zm
X1
Zm
X1
Zm
0.5*RFPP
Zm
R1
Zm
0.5*RFPP
ZM
0.5*RFPP
Zm
0.5*RFPP
Pm
0.5*RFPP
Zm
R
70
j
)
phase
/
(
W
70
j
PHS
Zm
RFFwPP
5
.
0
×
RFRvPP
5
.
0
×
RFRvPP
5
.
0
×
0.5*RFPP
Zm
en08000249.vsd
tan 70
°
1
X
PHS
tan 70
°
1
X
PHS
X1
R1PP=
R1PP=
X
)
phase
/
(
W
IEC08000249 V1 EN-US
Figure 180: Relation between measuring zone and FRPSPDIS characteristic for phase-to-
phase fault for φline>70° (setting parameters in italic)
7.10.4
Setting guidelines
IP14959-1 v2
The following setting guideline consider normal overhead lines applications where φloop and
φline is greater than 60°.
7.10.4.1
Resistive reach with load encroachment characteristic
M13142-312 v4
The procedure for calculating the settings for the load encroachment consist basically to
define the load angle
ArgLd, the blinder RLdFw in forward direction and blinder RLdRv in
reverse direction, as shown in figure
1MRK 505 343-UEN B
Section 7
Impedance protection
293
Application manual
Summary of Contents for Relion 670 series
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