PROVISION AND PROCEDURE FOR THE COMPENSATION OF A DEFECT CURRENT IN CASE OF A GROUND DEFECT.

摘要

Provision for compensation of a fault current in case of a unipolar earth fault (E), in particular in a three-phase power network (1) with three conductors (L1, L2, L3), in which at least one neutral point (3) on a secondary side of at least one supply transformer (2) or in a neutral point forming device is connected to a ground point (5.1) at least through a grounding reactance (4 ), in which at least one provision is provided for at least partial compensation of at least one frequency component, which deviates from a basic frequency of a mains voltage, from the fault current, in which the provision comprises the at least three switches (7), in which the conductors (L1, L2, L3) are respectively connected to at least one of the switches (7), in which the switches (7) are connected to a filtering circuit (6) or are part of the filtering circuit, in which the fil circuit Trado (6) is connected to a ground point (5.1, 5.3) and in which each of the switches (7) is manually and / or automatically activated by a ground fault detection arrangement, which detects the ground fault (E), characterized in that the arrangement comprises at least one current rectifier (8), in which the filtering circuit (6) is formed as a current rectifier (8).