A large ground current system refers to a three-phase system in a grounded power system where the neutral point is directly grounded or grounded through a low impedance. When a single-phase ground fault occurs, the ground short-circuitcurrent is very large, hence the name large ground current system.
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Large ground current system -
Large earth current system
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Large ground current system - in a grounded power -
Large ground current system - in grounding -
Systems with X0/X1≤4～5 belong to
Concept
A large ground current system refers to a three-phase system in a grounded power system where the neutral point is directly grounded or grounded through a low impedance. When a single-phase ground fault occurs, the ground short-circuit current is very large, hence the name large ground current system. Generally, systems of 110kV and above or three-phase four-wire systems of 380/220V
