GAS CIRCUIT BREAKER

• Main Authors: MAJIMA SHUYA, YOSHINO TOMOYUKI, ISHII AKIRA, SHINKAI TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 08.12.2014
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; RELAYS; SELECTORS

PROBLEM TO BE SOLVED: To provide a gas circuit breaker exhibiting excellent capacitive current interruption capability without requiring enhancement of the opening speed.SOLUTION: Gas circuit breaker having a closed container filled with an arc-extinguishing gas and opening and closing the path by switching between current conduction and interruption includes a fixed arc contactor 11 and a movable arc contactor 21 arranged opposing to each other and for generating an arc in an arc space to be formed therebetween by separation during the breaking process, a pressure-storing space 26 provided on the movable arc contactor 21 side, storing the pressure of the arc-extinguishing gas, and generating a gas flow for extinguishing the arc, an insulation nozzle 23 arranged to surround the movable arc contactor 21, and introducing and blowing the gas flow to the arc, a gas passage interconnecting at least the arc space and the pressure-storing space 26, and formed in the internal space of the insulation nozzle 23, and a swirl flow generation mechanism for generating a spiral swirl flow from a gas flow passing through the gas passage. 【課題】開極速度の向上を行わずとも良好な進み小電流遮断性能を得ることのできるガス遮断器を提供する。【解決手段】消弧性ガスが充填された密閉容器を有し、通電又は遮断を切り替えて電路を開閉するガス遮断器であって、互いに対向配置され、前記遮断過程において、互いを開離させて両方の間に形成されるアーク空間にアークを発生させる固定アーク接触子１１及び可動アーク接触子２１と、可動アーク接触子２１側に設けられ、消弧性ガスを蓄圧し、アークを消弧させるためのガス流を発生させる蓄圧空間２６と、可動アーク接触子２１を取り囲むように配置され、ガス流をアークに誘導し吹き付ける絶縁ノズル２３と、アーク空間と蓄圧空間２６とを少なくとも連通し、絶縁ノズル２３の内部空間に形成されるガス流路と、ガス流路を通過するガス流から螺旋状の旋回流を発生させる旋回流発生機構と、を備えた。【選択図】図１