ABB Relion 650 Series Technical Manual page 95

1MRK 506 326-UUS B
60 deg
RFItRevPG
ANSI06000396 V1 EN-US
Figure 42: Characteristic of FDPSPDIS (21) for phase-to-ground fault (setting parameters in
Besides this, the 3I
equation 7.
× ³
3 I 0.5 IMinPUPG
0
EQUATION2108-ANSI V1 EN-US
3
× ³
3 I
0
EQUATION1812-ANSI V1 EN-US
where:
IMinPUPG
3I Enable_PG is the setting for the minimum residual current needed to enable operation in the phase-to-ground
0
Iphmax
5.2.6.2 Phase-to-phase fault
For a phase-to-phase fault, the measured impedance by FDPSPDIS (21) will be according to
equation 8.
Line distance protection REL650
Technical manual
X (ohm/loop)
Kr·(X1+XN)
RFItRevPG
RFItFwdPG
RFItRevPG
RFItFwdPG
Kr·(X1+XN)
italic), ohm/loop domain (directional lines are drawn as "line-dot-dot-line")
residual current must fulfil the conditions according to equation
0
×
I Enable PG _
×
Iph max
0
100
is the minimum operation current for forward zones
fault loops (in %).
is the maximum phase current in any of three phases.
© Copyright 2011 ABB Power Grids. All rights reserved
RFItFwdPG
X1+XN
60 deg
R (Ohm/loop)
X1+XN
1
=
Kr
tan(60 deg)
en06000396_ansi.vsd
Section 5
Impedance protection
6 and
(Equation 6)
(Equation 7)
M13140-56 v3
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