Vacuum type switch gear device having L shaped stationary and movable conductor arrangement

摘要

In a vacuum type switch gear device having an L shaped stationary and movable conductors arrangement, a transitive portion (S) from one spiral arc groove (10A) to neighboring another spiral arc groove (10B) on the surface of the movable electrode (9) defined by the terminating end portion (10E) of the one spiral groove (10A), the starting end of the adjacent neighboring other spiral groove (10B) and the outer circumferential edge portion (9E) of the movable electrode (9) is arranged in a substantially overlapping relationship in vertical direction with the movable conductor (5), thereby an adverse effect of a current loop flowing through the movable conductor (5) against an arc (A) generated between movable and stationary electrodes (9, 8) is limited to thereby improve its circuit breaking performance. <IMAGE>