GAS CIRCUIT BREAKER

WIPO Patent Application WO/2019/092866

A1

Provided is a gas circuit breaker with which it is possible to reduce a decrease in the flow rate of arc-extinguishing gas sprayed on an arc. A gas circuit breaker 1 having a pressure accumulation chamber 38 that communicates with a compression chamber 36 via a through-hole 42b, is formed of a trigger electrode 31 and a second arc contactor 41, and stores arc-extinguishing gas that is increased in pressure in the compression chamber 36, the gas circuit breaker 1 being such that: in the first half during current breaking, the pressure accumulation chamber 38 is sealed by the trigger electrode 31 and the second arc contactor 41; and in the latter half during current breaking, the pressure accumulation chamber 38 is opened by the trigger electrode 31 and the second arc contactor 41 moving apart, arc-extinguishing gas is sprayed from an opening of the second arc contactor 41, and the arc between a first arc contactor 21 and the second arc contactor 41 is extinguished; wherein the through-hole 42b via which the pressure accumulation chamber 38 and the compression chamber 36 communicate has a check valve 42e for preventing the inflow of arc-extinguishing gas from the pressure accumulation chamber 38 to the compression chamber 36.

UCHII TOSHIYUKI (JP)
YOSHINO TOMOYUKI (JP)
KATO NORIMITSU (JP)
TANAKA TSUTOMU (JP)

PCT/JP2017/040662

May 16, 2019

November 10, 2017

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TOSHIBA KK (JP)
TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORP (JP)

H01H33/915

JP2015079635A	2015-04-23
JP2005276614A	2005-10-06
JP2009289614A	2009-12-10

KIUCHI, Mitsuharu (JP)

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