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AssigneeVEB Otto Buchwitz Starkstrom Anlagebau Dresden
InventorsKlaus Bohme, Wolfgang Beyer, Gunter Seibt, Michael Digmayer
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A vacuum switching apparatus having a pair of terminal members extending from a housing made from a fully solid insulating material such as epoxy resin, and forming an outer housing for the vacuum switching apparatus, into which a vacuum switching chamber is placed housing a fixed and a movable contact member, the movable contact member extending through metallic bellows into a sliding contact and into the coupling terminal, wherein a pair of control electrodes each being conductively coupled to a different one of the terminal members is embedded into the fully solid insulating housing and lying at the potential of the respective terminal members, a further control electrode placed in the insulating housing and lying in a region so that it will assume an intermediate potential between the terminal potentials and the ground potential and wherein further a grounded outer metallic casing encloses insulating housing.
A vacuum switching apparatus comprising a housing made from an insulating material, a cover means on the outer surface of said housing, said cover means adapted to be connected to ground potential, a vacuum switching chamber placed into said housing, a fixed and a movable contact member mounted in said vacuum switching chamber and each extending through said housing and forming a terminal means, said insulating housing and said vacuum switching chamber forming a space therebetween, gas filling said space, a pair of control electrodes embedded in said insulating housing axially spaced from each other, each of said pair of control electrodes being conductively coupled to a different one of said terminal means, and a further electrode means spaced from said pair of electrode means between said insulating housing and in a region of said insulating housing located with respect to said switching chamber in such a manner that said further electrode is at an electric potential lying between the potential of said terminal means and said ground potential.
Dependencies are inferred from the claim text.