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Home / Technical Articles / Neutral Point Treatment in Three-Phase Networks (Detailed Overview and Comparison)

Short Circuit To Ground

The main faults in power networks are the single-phase short-circuit and the short-circuit to ground. The short-circuit to ground is a conductive connection between a point in the network belonging to the operational circuit and ground.

Neutral Point Treatment in Three-Phase Networks
Neutral Point Treatment in Three-Phase Networks

Between 80% and 90% of all faults in grounded networks are short circuits to ground. If the short-circuit currents are identical in all three conductors with a three-phase short circuit, then the fault is symmetrical. In all other cases, the fault currents in the three conductors are different and these faults are then asymmetrical.

In addition, in three-phase networks various so-called transverse faults are possible.

Along with these transverse faults, line interruptions can also occur. This results in longitudinal faults, which are, however, of no importance for short-circuit current calculations.

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Edvard Csanyi

Electrical engineer, programmer and founder of EEP. Highly specialized for design of LV/MV switchgears and LV high power busbar trunking (<6300A) in power substations, commercial buildings and industry facilities. Professional in AutoCAD programming.

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