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    • 1. 发明授权
    • Device for detecting and for indicating fault current through a
lightning arrestor or an insulator
    • 用于检测和指示通过避雷器或绝缘体的故障电流的装置
    • US5373242A
    • 1994-12-13
    • US38804
    • 1993-03-29
    • Rene JoulieRene ParraudSerge Tartier
    • Rene JoulieRene ParraudSerge Tartier
    • H01C7/12H01F30/00H01T1/12H01T15/00H02H3/04G01R31/00
    • H02H3/048H01T1/12
    • A device for detecting and indicating a fault current flowing through a lightning arrestor or an insulator, the current being DC or at AC mains frequency, the device being housed inside a box that is provided with a frangible window and that has a piece of metal electrically connected to an end fitting of the lightning arrestor or of the insulator passing therethrough. The device has: a transformer for transforming the current, the primary of the transformer being constituted by the piece of metal, and the secondary of the transformer being connected to a peak-limiting circuit to make pulses of current due to surges corresponding, in particular, to lightning strikes inoperative; a heating resistance fed by said transformer and constituting an igniter for a pyrotechnic composition in which it is embedded, the composition being designed to break the frangible window; and preferably indicator means suitable for being released by rupture of the frangible window.
    • 一种用于检测和指示流过避雷器或绝缘体的故障电流的装置,该电流是DC或AC电源频率,该装置被容纳在设置有易碎窗口的箱体内,并且具有一块金属电 连接到避雷器或通过其的绝缘体的端部配件。 该装置具有:用于变换电流的变压器,变压器的初级由金属构成,变压器的次级连接到峰值限制电路,以使由于相应的浪涌引起的电流脉冲,特别是 ,雷击不起作用; 由所述变压器供给的加热电阻,并构成嵌入其中的烟火组合物的点火器,所述组合物被设计成破坏所述易碎窗; 并且优选地指示装置适于通过易碎窗口的破裂而被释放。