NEUTRAL WIRE EARTHING METHOD Russian patent published in 2014 - IPC H02H3/20 H02H9/04 

FIELD: electricity.

SUBSTANCE: invention is related to the field of electric engineering and can be used for reduction of overvoltage level and single-phase current in electric network. The method lies in earthing of the neutral wire by means of capacitors and a reactor. At that active resistance of the reactor branch is selected as the maximum value ensuring the preset single-phase closing current and the total capacitance of capacitors by the following condition: $$C\ge \frac{E}{\omega \cdot R\cdot U},$$ where ω is pulsation of the network; R is the selected active resistance for the branch of the reactor winding; U is the current value of voltage of the reactor at resonant current value; E is the current value of the phase electromotive force of the network.

EFFECT: improving reliability and safety of electric supply network.

3 cl, 6 dwg