| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum circuit breaker preventing widthwise deviation of interphase magnetic force by regulating right-and-left movement of a main-circuit conductor irrespective of its shape and size. SOLUTION: The vacuum circuit breaker is provided with: a vacuum valve 2; a main-circuit conductor 4 connected to a fixed contact of the vacuum valve for holding a fixed contact side of the vacuum valve; a second main-circuit conductor 6, connected to a movable contact of the vacuum valve; and an insulating frame 3, surrounding the vacuum valve and equipped with a first and a second fixing parts 31, 32 holding one end part each of the first main-circuit conductor and the second main-circuit conductor, respectively. At least either the first or the second fixing part consists of a plurality of locking holes of different shapes or sizes which may be selected in accordance with a structure of the one end of either the first main-circuit conductor or the second main-circuit conductor. COPYRIGHT: (C)2010,JPO&INPIT
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