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摘要

PCT No. PCT/JP83/00396 Sec. 371 Date Jul. 2, 1984 Sec. 102(e) Date Jul. 2, 1984 PCT Filed Nov. 4, 1983 PCT Pub. No. WO84/02032 PCT Pub. Date May 24, 1984.This invention aims at the reduction of stationary contact element wear and at realizing a significant improvement in the interrupting capability by providing a stationary contact having a hollow cut-out portion formed therein in the vicinity of the portion at which said contact element is joined, and an arc runner electrically connected to said stationary contact at an edge of said hollow cut-out portion closest to said contact element, the arc runner being extended above said hollow cut-out portion.