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US 5,723,840 AGranted
Gas-dielectric high-tension interrupter of the arc-puffer type
AssigneeAnsaldo Industria S.p.A.
InventorsPredrag Bojic, Sergio Rizzo
Life of this patent
Estimating the term…
Abstract
A gas-dielectric high-tension interrupter of the arc-puffer type in which the puff of gas is brought about by the combined effect of an excess pressure developed in a compression chamber and intensified by the heating caused by the arc radiation, which is optically guided from an arcing chamber to the compression chamber, and of the vacuum developed in a suction chamber which is put into communication with the arcing chamber at a predetermined minimum arcing time (TAM).
Claims8
A gas-dielectric high-tension interrupter of the arc-puffer type, comprising:
- a first fixed contact and a contact which is movable relative to the fixed contact and is opened by an operating rod in which an arcing chamber is formed, the rod having a predetermined opening travel D,
- a movable assembly fixed to the rod and comprising an insulating nozzle with a nozzle neck, slidable on the fixed contact, a cylinder forming, with the rod and the nozzle, a compression chamber closed by a first piston which is fixed relative to the fixed contact and is supported by a support cylinder, and a second piston fixed to the rod and movable in the support cylinder, the first fixed piston, the support cylinder, and the movable rod forming a suction chamber closed by the second piston,
- said rod having holes for communication between the arcing chamber and the compression chamber for positions of the movable rod corresponding to a first fraction of the opening travel, and for communication between the arcing chamber and the suction chamber for positions of the rod corresponding to a second fraction of the opening travel separate from the first fraction.
Dependencies are inferred from the claim text.