ABB Relion 650 Series Technical Manual page 484

Section 13
Monitoring
Z
0L
----------------------- -
K =
N
3 Z
EQUATION102 V1 EN-US
From these equations it can be seen, that, if Z
single line is obtained. Only the distribution factor differs in these two cases.
Because the D
equation
2
×
p – p K
EQUATION103 V1 EN-US
Where:
V
=
K
1
I
A
EQUATION1601 V1 EN-US
=
K
2
I
A
EQUATION1602 V1 EN-US
I
F A
K = --------------- -
3
I
A
EQUATION106 V1 EN-US
and:
• Z
ADD
• I , I
A FA
• K is calculated automatically according to equation 89.
N
• Z , Z
A
For a single line, Z
Equation
2
×
p – p Re K
EQUATION107 V1 EN-US
× ×
p Im
–
EQUATION108 V1 EN-US
478
– Z Z I
1L 0M 0P
×
---------------- - -------
+
× ×
3 Z I
1L 1L 0A
distribution factor according to equation
A
88 can be written in the form:
×
+ K – K R = 0
1 2 3 F
Z
+ +
1
A B
× +
Z Z Z
L L ADD
æ ö
V Z
× +
A B 1
ç ÷
× +
Z Z Z
è ø
L L ADD
Z + Z
æ ö
A B
×
-------------------------- - + 1
è ø
×
Z Z Z
+
L 1 A DD
= Z + Z for parallel lines.
A B
and V are given in the above table.
A
, Z , Z and Z are setting parameters.
B L 0L 0M
= 0 and Z
0M ADD
90 can be divided into real and imaginary parts:
( ) ( ) R × (
+ Re K – Re K
1 2 F
( ) × ( ) R × ×
K Im K Im
+ –
1 2 F
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= 0, then the general fault location equation for a
0m
= 0. Thus, equation 90
)
= 0
3
( )
K 0
=
3
86 or 88 is a function of p, the general
applies to both single and parallel lines.
Line distance protection REL650
1MRK 506 326-UUS B
(Equation 89)
(Equation 90)
(Equation 91)
(Equation 92)
(Equation 93)
(Equation 94)
(Equation 95)
Technical manual