Setting Guidelines - ABB RET670 Applications Manual

1MRK504116-UUS C
3.6.10.3
Application manual
×
0.5 RF Re
PHS
0.5*RFPP
Zm
X1
70
j
0.5*RFPP
0.5*RFPP
R1
ZM
×
0.5 RF Re vPP
X 1
R1PP=
tan 70°
ANSI08000249 V1 EN
Figure 157: Relation between measuring zone and FRPSPDIS (21) characteristic
for phase-to-phase fault for φline>70° (setting parameters in italic)

Setting guidelines

The following setting guideline consider normal overhead lines applications where
φloop and φline is greater than 60°.
W
( / phase )
X
X 1
PHS
R1PP=
tan 70°
vPP
×
0.5 RFFwdPP
0.5*RFPP
Pm
R1
Zm
Zm
j
0.5*RFPP
Zm Zm
X1
Zm
0.5*RFPP
Zm
Zm
PHS
IED application
Zm
X1
70
R
W
( / phase
ANSI08000249-1-
en.vsd
Section 3
)
353