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Current limiting fuse

阅读:630发布:2022-10-26

专利汇可以提供Current limiting fuse专利检索,专利查询,专利分析的服务。并且Low thermal mass fusible conducting elements are in nucleate boiling relationship to a dielectric liquid for normal large operating currents with resultant high heat transfer coefficient. For currents of short duration and substantially larger in magnitude than normal currents, the fusible conductive elements are in vapor film boiling relationship to the dielectric liquid with resultant heat transfer coefficient which is several orders of magnitude lower than the heat transfer coefficient for nucleate boiling. Accordingly, for currents of very large amplitude and short durations heat buildup and temperature rise of the fusible elements to the melting point thereof is rapid with resultant rapid circuit interruption.,下面是Current limiting fuse专利的具体信息内容。

1. A current limiting fuse comprising: a housing providing a sealed enclosure; a pair of electrodes, said electrodes supported in insulated relationship in said housing, each of said electrodes extending into said enclosure; at least one fusible conductive element located within said enclosure and connected between said electrodes; a dielectric liquid partially filling said enclosure and completely submerging said at least one fusible conductive element, a first predetermined current flow in said at least one fusible conductive element producing a predetermined thermal power flow into said liquid sufficient to produce nucleate boiling of said liquid but insufficient to produce complete vapor film boiling thereof, a second predetermined current flow in said at least one fusible conductive element producing a second predetermined thermal power flow into said liquid sufficient to produce complete vapor film boiling of said liquid whereby thermal energy accumulates in said at least one fusible conductive element at a rapid rate and raises the temperature thereof at a rapid rate, said at least one fusible conductive element being constituted so that said second predetermined thermal power flow raises the temperature thereof above the melting point thereof; and, a packing of granular arc quenching material about said at least one fusible conductive element.
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