Switchgear for HV DC network with forced arc extinction - has switching elements with projecting surface controlling path of discharge

摘要

The electrical switchgear is for d.c. networks and provide forced extinction of the discharge arc. This is achieved by the effect of the external drive of a mechanical, electromagnetic, pneumatic or other system. The direction of motion of the discharge arc is controlled. The surface (13) of the contact of the moving switching element (5) projects beyond the side of the main body in the direction of motion of the discharge arc (12). The contact zone (14) of the moving element and the fixed element (2) is displaced in the direction of the projection.