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Measured mode
Measured apparent impedance
Z
posseq
posseq
posseq
V
I
=
EQUATION2051-ANSI V1 EN-US
(Equation 111)
Z
AB
A
B
A
B
V
I
V
I
=
-
-
EQUATION2052-ANSI V1 EN-US
(Equation 112)
Z
BC
B
C
B
C
V
I
V
I
=
-
-
EQUATION2053-ANSI V1 EN-US
(Equation 113)
Z
CA
C
A
C
A
V
I
V
I
=
-
-
EQUATION2054-ANSI V1 EN-US
(Equation 114)
There are three characteristics in LEXPDIS (40) protection as shown in figure
Naimly:
•
Offset mho circle for Z1
•
Offset mho circle for Z2
•
Directional blinder
1MRK 502 066-UUS B
Section 7
Impedance protection
391
Technical manual
Summary of Contents for Relion 670 series
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