Gas insulated circuit breaker

• Main Authors: SONG, TAE HUN, SEOK, BOK YEOL, CHO, SUNG JOO
• Format: Patent
• Language: English; Korean
• Published: 11.08.2017
• Subjects: BASIC ELECTRIC ELEMENTS; BOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLYOR DISTRIBUTION OF ELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; GENERATION; RELAYS; SELECTORS

A gas insulated circuit breaker according to an embodiment of the present invention includes: a fixed main contact point including a fixed arc contact point; a movable main contact point including a movable arc contact point configured to be connected to or disconnected from the fixed arc contact point, wherein the movable main contact point includes a cylinder part including a thermal expansion chamber and a perforation chamber therein, and a piston part which injects an insulating gas received in the perforation chamber into the thermal expansion chamber; and a nozzle whose one end is connected to the thermal expansion chamber and the other end is opened toward the leading end of the movable arc contact point. An insulation material is provided on an inner surface of the thermal expansion chamber. Accordingly, the present invention can improve extinguishing performance. 본 발명의 일 실시예에 따른 가스절연 차단기는 고정아크접점을 구비하는 고정주접점; 상기 고정아크접점과 연결 또는 분리될 수 있도록 구성된 가동아크접점을 구비하고, 왕복 이동 가능하게 구성된 가동주접점 - 상기 가동주접점은 내부에 열팽창실과 퍼퍼실을 구비하는 실린더부와 상기 퍼퍼실 내에 수용된 절연가스를 상기 열팽창실로 분사시킬 수 있는 피스톤부를 포함함 - ; 및 일단이 상기 열팽창실과 연결되고, 타단이 상기 가동아크접점의 선단부를 향해 개방된 노즐;을 포함하며, 상기 열팽창실의 내부면에는 절연물질이 구비될 수 있다.