Patent ID: 8115133
Filing Date: 2012-02-14
Classification: H01H

Abstract:
1. A gas-insulated circuit breaker comprising: a sealed container filled with a gas; a pair of contacts so constructed as to be connected and separated each other as desired in the sealed container; gas flow generation means for blasting the gas on an arc generated when the contacts are separated, the gas flow generation means including: at least one pressure accumulation space, at least one pressure increasing means for increasing the pressure of the pressure accumulation space, at least one gas passage that connects the pressure accumulation space to the arc, and an insulating nozzle that controls the flow of the gas from the pressure accumulation space to lead the gas to the arc; an inside-nozzle insulating member disposed co-axially with respect to the insulating nozzle inside the insulating nozzle, wherein the arc is generated in a space between an inner wall section of the insulating nozzle and an outer wall section of the inside-nozzle insulating member, and the gas flows in the space.