Gas Circuit Breaker

A gas circuit breaker that blows an insulating gas having an arc-extinguishing property onto an arc produced at a time of interruption, and extinguishes the arc, the gas circuit breaker comprising:

• a filled container filled with the insulating gas;
• a fixed main conductor that is connected to a fixed lead conductor connected to a power system, and has an open section for discharging the insulating gas having an increased temperature and an increased pressure due to the arc produced at the time of the interruption;
• a movable main conductor that is supported by and fixed to an insulating support tube arranged inside the filled container, is connected to a movable lead conductor connected to the power system, and has a discharge hole for discharging the insulating gas;
• a movable contact electrically connected to the movable lead conductor;
• a fixed contact that is electrically connected to the fixed lead conductor connected to the power system, and can come into contact with and be separated from the movable contact;
• and
• a high-temperature-gas guiding section that is provided at an axial-end section of the fixed main conductor, and has a plurality of holes for discharging, into the filled container, a high-temperature gas produced by heating the insulating gas, wherein
• the high-temperature-gas guiding section includes a base section, and the plurality of holes that are formed in pipe-like forms protruding from the base section in an axial direction, and is formed such that directions of the plurality of holes formed in the pipe-like forms are oblique to an axial direction of the fixed main conductor.