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AssigneeLicentia Patent-Verwaltungs-G.m.b.H.
InventorsGunter Mittelbach, Gunter Horstmann, Werner Heiss, Dietrich Hoffmann, Gunter Siebrecht, Karl Kriechbaum, Gunter Rapp
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A puffer-type gas blast circuit interrupter composed of two separable contacts defining a power current path and between which an arc is created upon separation movement, in which the movable parts of the gas compressor and/or the region of contact between the contacts of an associated nominal current path are shielded from the region in which the arc is created by a shielding arrangement composed of a stationary cylinder surrounding the nozzle associated with the gas compressor and a shield member carried by the nozzle. Additionally, to reduce the movable mass of the interrupter, at least one of the current paths is constituted by two stationary contact pieces and a movable contact member carried by, and projecting from, the cylinder of the gas compressor. Further, the mass of the moving parts of the system is reduced by providing the shield member carried by the nozzle with a cylindrical projection coaxial with, and slidable relative to, the stationary cylindrical member. Preferably, the interface between the shield member and the cylindrical member is hermetically sealed.
In a puffer-type gas blast circuit interrupter switch including means defining two separable power current conducting contacts between which an arc is created upon contact separation, a nozzle of insulating material disposed for directing a stream of gas against such arc, means including a stationary piston and a movable cylinder defining a compressor operable by separation movement of the contacts to supply a mass of gas under pressure to the nozzle, a cylindrical member surrounding the region in which such arc is created and the nozzle, a shield member forming part of the nozzle, shaped to correspond with the cylindrical member and slidingly engaging the cylindrical member for guiding movement of the nozzle relative to the cylindrical member, and means defining an interruptable rated current conducting path in parallel with the power current conducting contacts, the rated current conducting path being interruptable before separation of the power current conducting contacts, the improvement wherein said rated current conducting path means comprise two stationary contact pieces spaced from one another and a contact bridging member mounted on said cylinder for connecting said stationary contact pieces together when said switch is closed.
Dependencies are inferred from the claim text.