To provide a ground fault protection device that can perform the minimum necessary opening of a breaker by identifying a place where a ground fault accident occurred.SOLUTION: An direct-current ground fault relay 10 includes: a detection unit 10a that detects a ground fault voltage in a feeder system S supplying a direct current to a train E; and a determination unit 10c that determines whether or not a ground fault that occurred is an alternating-current ground fault depending on whether or not the ground fault voltage detected by the detection unit 10a includes a second harmonic.SELECTED DRAWING: Figure 1

    【課題】地絡事故が発生した場所を特定することにより、必要最小限の遮断器の開放を可能とする地絡保護装置を提供する。【解決手段】直流地絡継電器10が、電車Eに直流を給電するき電システムSにおける地絡電圧を検出する検出部10aと、検出部10aが検出した地絡電圧に第2調波が含まれるか否かにより、発生した地絡が交流地絡か否かを判定する判定部10cを有する。【選択図】図1


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    Title :

    GROUND FAULT PROTECTION DEVICE


    Additional title:

    地絡保護装置


    Contributors:
    LAI GENSHUN (author)

    Publication date :

    2019-06-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen



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