| 摘要 |
PROBLEM TO BE SOLVED: To prevent non-clamping or non-mounting, release, or removal of a screw for screwing and connecting a master bar and a branch bar, when changing a power supply voltage supplied to the branch breaker. SOLUTION: A distribution switchboard is formed by arranging two rows of branch breaker 3 for supplying a power supply from a single-phase three-wire type main switcher to each load circuit by branching it inside a box body 2 by separating them by an arbitrary interval while power supply terminals oppose each other symmetrically at left and right and by connecting the main switcher and the branch breaker 3 with a conductive bar where master bars 4, 5, and 6 and branch bars 7, 8, and 9 that are branched from the master bars 4, 5, and 6 are formed in one piece. A slit A is provided as a cutting means at the boundary part between the master bar 5 of an N-phase conductive bar and the branch bar 8. |
