| 摘要 |
PURPOSE:To design to make a space occupation small by a method wherein vacuum switches in a group with two or three switches as one group are fitted on a mounting board corresponding to the group by each group and operated for opening and closing in sequence. CONSTITUTION:The three groups of the vacuum switches A1-A3, B1-B3, C1- C3 with two or three switches made as one group are fitted on the mounting board 3 arranged in parallel in the same horizontal surface, corresponded to the groups. The three groups of the vacuum switches A1-A3, B1-B3, C1-C3 are adapted to be engaged with cam bodies 25 by which cam follows 7 corresponded to the groups are reciprocatingly driven in a horizontal direction according to an operation device 19. Accompanying the horizontal reciprocating motion of the cam bodies 25, the vacuum switches in the same groups perform the same opening and closing operations and also the opening and closing operations in a prescribed sequence between the groups. The cam bodies 25 are cam-engaged with load regulators so as to suppress fluctuations of the loads relative to the operation device 19. |
