| 摘要 |
Provided is a vacuum circuit breaker in which a vacuum valve (46) is disposed horizontally in a tank (31), the vacuum valve (46) is housed in an insulating case (51), the insulating case (51) comprises two insulating frames (52) consisting of a first insulating frame with a roughly C-shaped cross-section and a second insulating frame with a shape symmetrical to that of the first insulating frame, and the two insulating frames (52) are disposed with the openings of the roughly C-shaped cross-sections facing each other and a gap being provided therebetween, wherein cutaway sections (53, 54) for allowing a movable-side conductor (44) and a fixed-side conductor (48) to pass are provided in the upper and lower edges of the roughly C-shaped cross-sections of the insulating frames (52), and the insulating frames (52) are further provided with a mounting rib (55), a mounting end surface (61), and a tank mounting section (59) for mechanically securing the mobile-side conductor (44), the fixed-side conductor (48), and a tank flange (31a), respectively. |
