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    • 9. 发明公开
    • Current limiting device
    • 限流装置
    • EP0762439A2
    • 1997-03-12
    • EP96304363.3
    • 1996-06-11
    • GENERAL ELECTRIC COMPANY
    • Duggal, Anil RajPatchen, Harold JayLevinson, Lionel MontyLewis, Larry Neil
    • H01C7/12
    • H01H9/465H01C7/027H01C7/12H01H2033/163H02H9/026
    • A current limiting device utilizing an electrically conductive composite material and an inhomogeneous distribution of resistance structure is disclosed. The inhomogeneous distribution is typically chosen so that at least one selected thin layer of the current limiting device has much higher resistance than the rest of the current limiting device. In the actual device, pressure (P) is exerted on the composite material in a direction normal to the selected thin layer. During a short-circuit, it is believed that adiabatic resistive heating of this selected thin layer is followed by rapid thermal expansion which leads to either a partial or complete physical separation of the current limiting device at the selected thin layer which produces a higher over-all device resistance to electric current flow. Thus the current limiting device limits the flow of current through the short-circuited current path. When the short-circuit is cleared, the current limiting device regains its low resistance state allowing electrical current to flow normally. The current limiting of the present invention is reusable for many such short circuit conditions.
    • 公开了一种利用导电复合材料和电阻结构的不均匀分布的限流装置。 通常选择非均匀分布,使得限流装置的至少一个选定薄层具有比限流装置的其余部分高得多的电阻。 在实际的装置中,压力(P)在垂直于所选薄层的方向上施加在复合材料上。 在短路期间,认为该选择的薄层的绝热电阻加热之后是快速热膨胀,这导致限流装置在所选薄层处的部分或完全物理分离, 所有器件对电流的阻抗。 因此限流装置限制了通过短路电流路径的电流流动。 当短路清除后,限流装置恢复其低阻状态,允许电流正常流动。 本发明的电流限制对许多这种短路状况是可重复使用的。