ABB RELION REX640 Technical Manual page 899

1MRS759142 C
REX640
Technical Manual
Forward
X
Z1 angle zone x
R
GUID-FBAFADF9-3559-4113-BC47-3A99C4116E1F V1 EN
Figure 486: Settings which define the line reach for phase-to-phase or three-
phase impedance measuring elements if Impedance mode Zn =
"Polar"
In case of phase-to-earth impedance measuring elements, the line reach is defined
with:
• Z1 zone x (x = 1...5)
• Z1 angle zone x (x = 1...5)
• Factor K0 zone x (x = 1...5)
• Factor K0 angle Zn x (x = 1...5)
The reach magnitude and angle are:
Magnitude abs Z Z K
( 1
= +
GUID-33CAC382-5913-4291-BE92-BB7D7E606208 V1 EN
Angle angle Z ( 1 Z K 1
N
= +
GUID-A4D4CA59-83C2-420E-AE6E-6BDE771249EE V1 EN
Z Z zone x 1 (cos( Z angle zone x 1
1
=
GUID-4AB65D14-8152-42BB-9316-EDD26CEE0F31 V1 EN
K Factor K zone x 0 (cos(
N =
GUID-E5F6BF97-5909-4BC5-AFAD-980DE6F78091 V1 EN
In case of non-directional characteristics, the reactive reach in reverse direction is
defined with the Z1 reverse zone x (x = 1...5) setting.
Z Z reverse zone x 1 (cos(
1 R =
GUID-5BB7F77F-D2B7-4B5F-9F45-52942A573F62 V1 EN
Reverse
X
1 )
⋅
N
)
) j sin( Z angle zone x 1
+
Factor K angle znx 0
Z angle zone x 1 ) j sin(
+
Section 4
Protection functions
Non-directional
X
R
))
) j sin( Factor K angle z 0
+
Z angle zone x 1 ))
R
(Equation 224)
(Equation 225)
n n x))
(Equation 228)
893