Gas circuit breaker

摘要

A gas circuit breaker is configured by comprising a tank filled with arc extinguishing gas, a pair of fixed side arc contact and moving side arc contact in the tank, a puffer chamber formed with a puffer cylinder including the moving side arc contact at its end and a fixed piston, and an insulating nozzle, attached to the end of the puffer cylinder, surrounding the moving side arc contact, that forms a flow channel to guide arc extinguishing gas from the puffer chamber to the contacts. A puffer cylinder 104 has a cylindrical member 104a at a breaker side end, an end of the insulating nozzle 101 is provided in the cylindrical member 104a. And the gas circuit breaker is configured by further comprising a hollow moving side main contact 102 at a breaker side end of the cylindrical member 104a, a pressing metal fitting 103 to engage an insulating nozzle 101 in the hollow part of the moving side main contact 102.

主权项

1. A gas circuit breaker comprising:
a tank filled with an arc extinguishing gas; a fixed side arc contact and moving side arc contact in the tank; a puffer chamber formed with a puffer cylinder including the moving side arc contact at an end and a fixed piston; and an insulating nozzle, attached to the end of the puffer cylinder, surrounding the moving side arc contact, that forms a flow channel to guide the arc extinguishing gas from the puffer chamber to the contacts, wherein the arc extinguishing gas in the puffer chamber is compressed in accordance with opening operation of the contacts and blown to an arc between the contacts, wherein the puffer cylinder has a cylindrical member at a breaker part side end, wherein an end of the insulating nozzle is provided in the cylindrical member, and further comprising: a hollow moving side main contact at a breaker part side end of the cylindrical member; and an engagement member that engages the insulating nozzle in a hollow part of the moving side main contact, and wherein the engagement member has a long hole in which a position of the engagement member in the hollow part is adjustable in a diameter direction of the insulating nozzle.