Gas breaker of gas insullated switchgear

The present invention provides a gas breaker of a gas insulated switchgear. The gas breaker of the gas insulated switchgear comprises: an operation-side upper supporter in which a compression chamber and a thermal expansion chamber are formed by being separated from each other, and which penetrates a heat discharge tube; an operation arc contact point installed on one end of the heat discharge tube; an auxiliary nozzle placed to surround a circumference of the operation arc contact point; an operation-side cooling tank installed on the other end of the operation-side upper supporter, and in which one end of the heat discharge tube is exposed inside and an operation-side first discharge hole is formed on the other end; an operation-side outer shield surrounding a circumference of the operation-side cooling tank, and in which one end is connected to the other end of the operation-side upper supporter, and on one end an operation-side second discharge hole is formed; a fixed-side upper supporter placed to face the operation-side upper supporter; a main nozzle placed in the fixed-side upper supporter, and in which an end unit surrounds one end of the auxiliary nozzle, and which is engaged with one end of the operation-side upper supporter; a fixed-side cooling tank to which one end of the main nozzle is exposed, and which is connected to one end of the fixed-side upper supporter, and which has a fixed-side first discharge hole; and a fixed-side outer shield surrounding a circumference of the fixed-side cooling tank, and in which one end is connected to the other end of the fixed-side upper supporter, and on one end a fixed-side second discharge hole is formed. A flow suppression unit is placed between the outer circumference of the operation-side cooling tank and the inner circumference of the operation-side outer shield and between the outer circumference of the fixed-side cooling tank and the inner circumference of the fixed-side outer shield in order to suppress the flow rate of thermal gas to be a certain level or lower. The present invention aims to provide a gas breaker of a gas insulated switchgear, which is capable of safely discharging thermal gas. 본 발명은 가스절연개폐장치의 가스 차단기를 제공한다. 상기 가스절연개폐장치의 가스 차단기는 내부에 압축실과열팽창실이 구획되어 형성되고, 열 배출 튜브가 관통되는 가동측 상부 지지대; 상기 열 배출 튜브의 일단에 설치되는 가동 아크 접점; 상기 가동 아크 접점의 둘레를 에워 싸도록 배치되는 보조 노즐; 상기 가동측 상부 지지대의 타단에 설치되며, 내부에 상기 열 배출 튜브의 일단이 노출되고, 타단에 가동측 제 1배출홀이 형성되는 가동측 냉각통; 상기 가동측 냉각통의 둘레를 에워싸며, 일단이 상기 가동측 상부 지지대의 타단에 연결되고, 일단에 가동측