CIRCUIT BREAKER

摘要

A circuit breaker is provided to decrease a size of a manipulation unit for a vacuum valve by reducing a bounce of an axis on a movable electrode using a simple structure. A circuit breaker includes a vacuum valve(51), a manipulation unit, and opening units(170,171). The manipulation unit maintains a closed condition of the vacuum valve using an attractive force from a permanent magnet(306). The opening units move a manipulation axis(65) of the manipulation unit to an open direction by using an electrical repelling force. A release device(900) releases a closed station of the vacuum valve due to the manipulation unit between the opening units and the manipulation unit in response to the opening process of the opening units.