GE D30 Instruction Manual page 324
Line distance
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Also See for D30:
- Instruction manual (686 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (685 pages)
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8.1 DISTANCE ELEMENTS
g) DIRECTIONAL CHARACTERISTIC
The directional characteristic is achieved by checking the angle between:
AB phase element:
BC phase element:
CA phase element:
A ground element:
8
B ground element:
C ground element:
The characteristic and limit angles of the directional comparator are adjustable independently from the mho and reactance
comparators. The directional characteristic improves directional integrity of the distance functions.
h) RIGHT BLINDER
The right blinder characteristic is achieved by checking the angle between the following signals:
AB phase element:
BC phase element:
CA phase element:
A ground element:
B ground element:
C ground element:
The blinders apply to the Quad characteristic only.
i) LEFT BLINDER
The left blinder characteristic is achieved by checking the angle between the following signals:
AB phase element:
BC phase element:
CA phase element:
A ground element:
B ground element:
C ground element:
The blinders apply to the Quad characteristic only.
j) FAULT-TYPE CHARACTERISTIC
The fault-type characteristic applies to ground elements only and is achieved by checking the angle between:
A ground element:
B ground element:
C ground element:
The limit angle of the comparator is not adjustable and equals 50°. The fault-type characteristic is intended to block the
ground distance elements during double-line-to-ground faults.
k) ZERO-SEQUENCE DIRECTIONAL CHARACTERISTIC
The extra zero-sequence characteristic applies to ground zones 2 to 5 only and is achieved by checking angles between:
A ground element:
B ground element:
C ground element:
8-4
) × Z
(I
– I
and
(V
– V
A
B
D
A
) × Z
(I
– I
and
(V
– V
B
C
D
B
) × Z
(I
– I
and
(V
– V
C
A
D
C
I_0 × Z
and
V
_1M
D
A
I
_2 × Z
and
V
_1M
A
D
A
I_0 × Z
and
V
_1M
D
B
_2 × Z
I
and
V
_1M
B
D
B
I_0 × Z
and
V
_1M
D
C
_2 × Z
I
and
V
_1M
C
D
C
(I
– I
) × Z
– (V
– V
)
and
A
B
R
A
B
) × Z
(I
– I
– (V
– V
)
and
B
C
R
B
C
) × Z
(I
– I
– (V
– V
)
and
C
A
R
C
A
× Z
+ I_0 × K0 × Z
× K0M × Z
I
+ I
A
R
R
G
I
× Z
+ I_0 × K0 × Z
+ I
× K0M × Z
B
R
R
G
I
× Z
+ I_0 × K0 × Z
+ I
× K0M × Z
C
R
R
G
) × Z
(I
– I
– (V
– V
)
and
A
B
L
A
B
(I
– I
) × Z
– (V
– V
)
and
B
C
L
B
C
(I
– I
) × Z
– (V
– V
)
and
C
A
L
C
A
× Z
+ I_0 × K0 × Z
× K0M × Z
I
+ I
A
L
L
G
× Z
+ I_0 × K0 × Z
× K0M × Z
I
+ I
B
L
L
G
× Z
+ I_0 × K0 × Z
× K0M × Z
I
+ I
C
L
L
G
I_0
and
I
_2;
A
I_0
and
I
_2
B
I_0
and
I
_2
C
I_0 × Z
and
–V_0
D
I_0 × Z
and
–V_0
D
I_0 × Z
and
–V_0
D
D30 Line Distance Relay
)_1M
B
)_1M
C
)_1M
A
(I
– I
) × Z
A
B
R
) × Z
(I
– I
B
C
R
) × Z
(I
– I
C
A
R
× Z
– V
and
I
R
A
A
– V
and
I
× Z
R
B
B
– V
and
I
× Z
R
C
C
) × Z
(I
– I
A
B
L
(I
– I
) × Z
B
C
L
(I
– I
) × Z
C
A
L
× Z
– V
and
I
L
A
A
L
× Z
– V
and
I
L
B
B
L
× Z
– V
and
I
L
C
C
8 THEORY OF OPERATION
+ I_0 × K0 × Z
× K0M × Z
+ I
R
R
G
+ I_0 × K0 × Z
+ I
× K0M × Z
R
R
G
+ I_0 × K0 × Z
+ I
× K0M × Z
R
R
G
+ I_0 × K0 × Z
× K0M × Z
+ I
L
G
+ I_0 × K0 × Z
× K0M × Z
+ I
L
G
+ I_0 × K0 × Z
× K0M × Z
+ I
L
L
G
GE Multilin
R
R
R
L
L
L
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