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AssigneeABB Research Ltd.
InventorsBodo Bruhl, Elias Julke, Kurt Kaltenegger, Lutz Niemeyer, Leopold Ritzer
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The stock contains an insulating-material matrix and a filler embedded in the matrix and is distinguished by a cellular structure. The predominant portion of the cells is filled with a material having arc-extinguishing properties or contains a material which, on exposure to an arc, forms arc-extinguishing gas. For the purpose of improving the making and breaking capacity, such a stock can advantageously be employed in a gas-blast circuit breaker in which arc-extinguishing gas is blown onto the switching arc. This involves the stock preferably being positioned at such points guiding the arc-extinguishing gas, at which the stock is exposed to the radiation of the arc and the thermal action of arc gases.
An electrically insulating stock which gives off arc-extinguishing gas when exposed to an arc, said stock comprising an insulating-material matrix and a filler embedded in the matrix, said filler comprises a cellular structure in which a predominant portion of the cells is filled with a material having arc-extinguishing properties or contains a material which upon exposure to an arc forms the arc-extinguishing gas.
Dependencies are inferred from the claim text.