Vacuum interrupter

Abstract

A vacuum interrupter comprising each electrode assembly of a pair of electrode assemblies having substantially the same structure and arranged in an evacuated envelope in opposed relationship adapted to be connected with or disconnected from each other. Each electrode assembly includes a coil electrode having a plurality of arms extending outwardly from a center ring shaped holding part and a plurality of arc-shaped coil parts formed substantially along the same circumference of the coil electrode and connected to respective ones of the arms, a main electrode including an arc-shaped arm electrically connected to each arc-shaped coil part of the coil electrode, the coil parts being in contact with corresponding ones of the arc-shaped arms along entire surfaces thereof, and a first arm connected to each of the arc-shaped arms of the main electrode and extended substantially toward a center of the main electrode in the radial direction. The first arms of one of electrode assemblies are arranged in substantially the same direction as the direction of first arms in the other electrode assembly arranged in opposed relationship to the electrode assembly.