where
Z
1
is the positive sequence impedance of the line (Ohm/phase)
KN
is the zero-sequence compensator factor
The angle β between the Vcomp and the polarize voltage Vpol for a A-to-ground fault is
(
)
A
A
arg V
I
IN KN ZPE
arg(Vpol)
b =
-
+
×
×
-
é
ù
ë
û
EQUATION1592 V1 EN
(Equation 19)
where
V
A
is the phase voltage in faulty phase A
I
A
is the phase current in faulty phase A
IN
is the zero-sequence current in faulty phase A (3I0)
KN
EQUATION1593 V1 EN
Z0-Z1
3 Z1
×
EQUATION1594 V1 EN
the setting parameter for the zero-sequence compensation consisting of the magnitude
KNMag and the angle KNAng.
V
pol
is the 100% of positive sequence memorized voltage V
A
Section 6
1MRK 506 335-UUS A
Impedance protection
116
Technical manual
Содержание REL650 series
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