PCT No. PCT/DE90/00711 Sec. 371 Date Jul. 2, 1992 Sec. 102(e) Date Jul. 2, 1992 PCT Filed Sep. 13, 1990 PCT Pub. No. WO91/06996 PCT Pub. Date May 16, 1991.A three-pole, metal-encased, pressurized-gas-insulated, high-voltage switchgear may include a single-pole, encapsulated, high-voltage power switch. Breaker units are located in a pressure chamber and are arranged with longitudinal axes thereof parallel to one another, and are attached to a bearing component which also carries the casing of the drive. In order to increase the mechanical rigidity of the bearing component, a shared gear casing with two partitions is provided for the switching mechanism, to which the breaker units are attached via bearing rings. The bearing rings, held by bridges, lie in front of three apertures on a side wall of the gear casing, to the flanges of which the pressure chambers are also attached. In the interior of the gear casing, carriers for the bearings of the drive shafts are provided, which proceed from the partitions or an outer wall. All bearing and sealing surfaces of the gear casing lie in parallel planes in each case, and can be machined in a single clamping process. The shared gear casing for the switching mechanism is suitable for single-pole, encapsulated, pressurized-gas-insulated, high-voltage power switches of three-pole, metal-encased, pressurized-gas-insulated, high-voltage switchgears.
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