GAS-INSULATED SWITCH APPARATUS

A gas-insulated switching device (1) includes, inside a pressure tank (4): a vacuum valve (11) having, in a vacuum, a movable contact (14) provided on one side of a movable conductor (12) and a fixed contact (15) provided to a fixed conductor (13); an insulation rod (23) connected to another side of the movable conductor (12) led out from the vacuum valve (11) through a bellows (16); an operation rod (24) connecting the insulation rod (23) and an operation device (5) outside the pressure tank (4) to each other; an airtight container (26) in which the insulation rod (23), the other side of the movable conductor (12), and the operation rod (24) are accommodated; and an intermediate pressure chamber (37) formed by communication between internal spaces of the bellows (16) and the airtight container (26). A sliding contact member (32) is provided to the other side of the movable conductor (12). The sliding contact member (32) is connected, via the airtight container (26), to a main circuit conductor (8) provided inside the pressure tank (4). A communication portion provided between the airtight container (26) and the sliding contact member (32) allows communication inside the airtight container (26).