The invention relates to a new scheme for switch device in power system, which is realized by: arranging at least busbar and divided-busbar fixed contact in a ladder-movement switch cabinet and switch assembly on movable frame by lifting gear to move up-and-down carried by power-driven lifting gear; moving upward to make moving contacts of inlet and outlet insert with said fixed contacts while moving downward to generate synchronous separating. The insertion and separation between switch assembly and moving/fixed contacts are intuitive and visible and measurable; there is obvious separation fracture to prevent misjudgment and operation and ensure security; the cabinet takes only one third area of prior art. |