ABB Relion 650 Series Technical Manual page 83

1MRK 506 326-UUS B
IEC09000308 V1 EN-US
Figure 33: Characteristic for phase-to-ground measuring
1 RFPE
KNMag |Z|
2
where:
|Z|
3
where
LineAng
4
KNAng (negative)
5
Line distance protection REL650
Technical manual
X ( W /loop)
1
5
2
3
4
1 1
KN·Z =ZN
Z denotes the positive sequence vector corresponding to the zone reach
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1
R ( W /loop)
IEC09000308_1_en.vsd
Section 5
Impedance protection
77