Vacuum power interrupter
AssigneesMeidensha Corporation, Kabushiki Kaisha Gemvac
InventorsYoshiyuki Kashiwagi, Shuzo Tanigaki, Naoki Kondo, Tsutae Suzuki
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Abstract
A vacuum power interrupter is disclosed wherein a chromium oxide film is formed on a surface of a stainless steel shield disposed within a vacuum vessel, thereby making it possible to improve the flashover voltage and interrupting ability.
Claims3
A vacuum power interrupter comprising a pair of electrical contacts disposed within a substantially cylindrical vacuum vessel so as to be movable into and out of contact with each other, and a shield member of stainless steel disposed within said vacuum vessel, the improvement wherein substantially an entire surface of said shield member facing or surrounding the electrical contacts is coated with a chromium oxide film.
A vacuum power interrupter according to claim 2 or 3, wherein said chromium oxide film has a thickness in the approximate range of 30 A to 200 A.
Dependencies are inferred from the claim text.