Susceptance Operation; Figure 82: Conductance Operation; Figure 83: Susceptance Operation - GE MiCOM P40 Agile Technical Manual

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P14x
Conductance:
Directional Forward
E00710

Figure 82: Conductance operation

Note:
For forward operation, the centre of characteristic occurs when IN is in phase with VN.
Note:
If the correction angle is set to +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 are 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.
Susceptance:
Directional Forward
E00711

Figure 83: Susceptance operation

Note:
For forward operation, the centre of characteristic occurs when IN ieads VN by 90°.
P14xEd1-TM-EN-1
B
Operate
Operate
G>Gs
G< Gs
Gs
G
Directional Reverse
B
Operate
B>Bs
Bs
G
Directional Reverse
Chapter 6 - Current Protection Functions
B
Gs
G
Conductance:
B
G
Bs
Operate
B< Bs
Susceptance:
B
Operate
Operate
G< Gs
G>Gs
Gs
Gs
Conductance:
Non-Directional
B
Operate
B>Bs
Bs
G
Bs
Operate
B< Bs
Susceptance:
Non-Directional
G
157

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