E00710
Operate
Operate
Conductance:
Directional Forward
Conductance:
Directional Reverse
Operate
Conductance:
Non-Directional
Operate
B
B
B
G G G
Gs
Gs
Gs
G>Gs
G< Gs
G< Gs
G>Gs
Gs
Figure 82: Conductance operation
Note:
For for
ward operation, the centre of characteristic occurs when IN is in phase with VN.
Note:
If the corr
ection angle is set t
o +30°, this rotates the boundary from 90° - 270° to 60° - 240°. It is assumed that the direction of
the G axis indicates 0°.
17.3 SUSCEPTANCE OPERATION
The susceptance protection may be set non-directional, directional forward or directional reverse. Hence, provided
the magnitude and the directional criteria ar
e met for susceptance and the magnitude of neutral voltage exceeds
the set value VN Threshold, the relay will operate. The correction angle causes rotation of the directional boundary
for susceptance through the set correction angle.
E00711
Operate
Operate
Operate
Operate
Susceptance:
Directional Forward
Susceptance:
Directional Reverse
Susceptance:
Non-Directional
B
B
B
Bs
Bs
G G
G
Bs
Bs
B< Bs
B< Bs
B>Bs
B>Bs
Figure 83: Susceptance operation
Note:
For for
ward operation, the centre of characteristic occurs when IN ieads VN by 90°.
P14x Chapter 6 - Current Protection Functions
P14xEd1-TM-EN-1 157
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