METHOD OF THE SWITCHING OFF ELECTRIC ARC EXTINGUISHING Russian patent published in 2018 - IPC H01H33/00 

FIELD: electricity.

SUBSTANCE: invention relates to the field of electrical equipment construction. Method includes the arc deforming with the arc extinguishing fluid flooded jets flowing out of the contacts cavity into the arc extinguishing chamber, starting from the moment when the arc ignition with the contacts disengagement, process of action on the arc is accompanied by the control of the selected arc parameter and when the value of this parameter is reached a predetermined value, the arc extinguishing is terminated by the additional action of shock waves directed perpendicular to the arc frontal section and generated by means of arresters concentrically to the contacts installed in the arc-extinguishing chamber. As the controlled parameter, the voltage change rate on the arc dU/dt is selected, and the arc voltage change rate sensor is connected with a delay relative to the time for switching device actuation command, delay value is determined according to the given ratio.

EFFECT: technical result consists in reducing of the switching losses while increasing the operation reliability.

5 cl, 4 dwg