GAS CIRCUIT BREAKER

摘要

An outer circumferential wall (15) surrounds a heating chamber (7), which communicates with an arc chamber (6) via an aperture part (8) that separates fixed contacts (4a, 4b) in the circumferential direction. The outer circumferential wall (15) is equipped with a heat-resistant tubular thermal-flow-receiving wall part (9), which is arranged at a position opposing the aperture (8) in the radial direction, and a tubular wall part (10), which is formed with an insulating material and is connected to this thermal-flow-receiving wall part (9) in the direction of the central axis (25), and one end of which on the side opposite the side that is connected to the thermal-flow-receiving wall part (9) is connected to a fixed-side energizing member (1a). Thus, the outer circumferential wall (15) surrounding the heating chamber (7) can be protected from damage and thermal degradation caused by hot gases.