Isolation Structure For Vacuum Circuit Breaker

The present invention encompasses the carrying parts of the vacuum circuit breaker, relates to a vacuum interrupter insulating material insulating structure formed of a main body which is provided in the form enclosing the live parts frame; Is provided on the main frame, the frame carrying parts installation the conductor forming the additional installation space to be installed; Insulating spacer member that is formed projecting from the mounting frame, the spaced conductor carrying parts in the mounting frame; And, it is formed so as to partition between the adjacent the installation space portion formed on the mounting frame, the partition member to increase the insulation distance between the conductive part conductor; includes, the partition member is adjacent to the installation of the installation frame, the partition member for partitioning between a space portion; And, wherein it is provided so as to project from the partition member, the insulating extension member to relieve the electric field concentration and to increase the separation distance isolated; is provided with, and formed with the partition member has at least two or more of the isolated elongated member, the following equation provides a vacuum interrupter insulated structure satisfy the following (1). Formula (1) (Here, the height of the distance, H = insulating member extending between L = insulating extension member which projects from the partition member.)