SWITCHING DEVICE FOR CONDUCTING AND INTERRUPTING ELECTRIC CURRENTS Russian patent published in 2018 - IPC H03K17/567 H01H33/59 

FIELD: electricity.

SUBSTANCE: invention relates to switching devices for conducting and interrupting electric currents. Technical result is achieved by means of an auxiliary coil which is galvanically isolated from the circuit of a switching drive for moving contacts of the first and second mechanical contact assemblies and is electromagnetically coupled to a coil of the switching drive in such a way that a voltage is produced in the auxiliary coil when the voltage supply of the switching drive is switched off, wherein voltage is supplied to switching electronics, said voltage being generated in the auxiliary coil when the supply of voltage to the switching drive is switched off, and a current transformer for detecting current flow through the semiconductor switch and generating a corresponding signal which is supplied to the switching electronics, the switching electronics being configured to switch off the semiconductor switch depending on the signal being supplied.

EFFECT: technical result is to prevent the development of electric arcs when an electric current is interrupted.

9 cl, 2 dwg