Phase-to-ground fault
IEC09000725_1_en.vsd
1
Z
3
4
7
5
6
2
a
d
b
c
80%
50%
e
X
KN
M
ag
·
|
Z
|
RFPE
RLdFw
R
W
/loop
IEC09000725 V1 EN
Figure 10:
Distance protection characteristic with test points for phase-to-ground
measurements
Table
is used in conjunction with figure
.
Table 3:
Test points for phase-to-groundC-E (Ohm/Loop)
Test point
Reach
Value
Comments
1
X
Z · Sin (LineAng) + KNMag · Z ·
Sin (L KNAng)
R
0
2
X
0
R
RLdFw
When RLdFw < RFPE
R
RFPE
When RLdFw > RFPE
3
X
0.8 (Z · Sin (LineAng) + KNMag ·
Z · Sin (L KNAng))
R
0.8(Z · Cos (LineAng) + KNMag ·
Z · Cos (L KNAng)) +
RFPE
4
X
0.8 (Z · Sin (LineAng) + KNMag ·
Z · Sin (L KNAng))
Can be limited by RFPE
R
-(0.8 (Z · Sin (LineAng) + KNMag ·
Z · Sin (L KNAng)) ·
tan (ArgNegRes-90)
Table continues on next page
Section 6
1MRK 506 331-UUS A
Testing functionality
48
Commissioning Manual
Содержание Relion 650 Series REL650
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