Patent ID: 7956306

Claim:
A high-voltage switch having a metal container filled with insulating gas and having a quenching chamber installed in the container, containing a housing which is aligned along an axis, an arcing contact arrangement which is held in the housing, an exhaust volume which is bounded by the housing, and an outlet channel which is passed through the wall of the housing for guiding a flow of exhaust gases in which the outlet channel opens with a mouth section which is aligned predominantly axially into the container, and in which the mouth section is bounded on the inside by a tubular first section of the housing and on the outside by a tubular housing attachment which surrounds the housing section at a distance from it, and which housing section comprises an end face with a convex-shaped surface for controlling an electrical field between the metal container and the quenching chamber, wherein an electrically shielded first edge is arranged on one end face of the housing attachment, wherein the first edge bounds an inner surface of the housing attachment in a flow direction of the exhaust gases, and wherein the radius of curvature of the first edge is considerably smaller than the radius of curvature of the convex-shaped surface of the end face such that the flow of exhaust gases is passed in an annular shape around the axis, and wherein the first edge is used for detachment of a flow emergent from the outlet channel of the exhaust gases from the housing attachment and prevents the exhaust gases from entering areas which are adjacent to the convex-shaped surface of the end face and an adjoining convex-shaped section of an outer surface of the housing attachment.