R
X
60°
60°
1
2
3
5
6
6
6
6
7
7
8
8
4
IEC09000043_1_en.vsd
W
( / loop)
W
( / loop)
4
3
5
IEC09000043 V1 EN-US
Figure 182: Relation between distance protection phase selection (FDPSPDIS) and
impedance zone (ZMQPDIS) for phase-to-earth fault φloop>60° (setting
parameters in italic)
1 FDPSPDIS (phase selection)(red line)
2 ZMQPDIS (Impedance protection zone)
3
RFltRevPG
PHS
4 (
X1
PHS
+XN)/tan(60°)
5
RFltFwdPG
PHS
6
RFPG
ZM
7
X1
PHS
+XN
8 φloop
9
X1
ZM
+XN
Reactive reach
M13142-9 v4
The reactive reach in forward direction must as minimum be set to cover the measuring zone
used in the Teleprotection schemes, mostly zone 2. Equation
gives the
minimum recommended reactive reach.
PHS
Zm
X1
1.44 X1
³
×
EQUATION1309 V1 EN-US
(Equation 302)
1MRK 505 343-UEN B
Section 7
Impedance protection
297
Application manual
Содержание Relion 670 series
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