Abstract: In an encapsulated, compressed gas-insulated high-voltage switchgear there is arranged in the interior of the encapsulation a drive and breaker units actuated by it. The breaker units are carried by a flange plate which closes the encapsulation off so that is is pressureproof. The flange plate is connected with the drive on the side away from the interior. To secure the position of the breaker units and hence also the coupling between them and the respective drive independently of the compressive stress of the flange plate, a substantially flat support plate is provided which directly receives the breaker units and which, extending parallel with the flange plate, is connected therewith via at least three parallel spacers which are arranged in a triangle.