A ground fault detection apparatus includes a detection capacitor, termination resistors on positive- and negative-electrode sides, bypass resistors on positive- and negative-electrode sides, a bypass twin relay, twin relays on positive- and negative-electrode sides, and a control unit configured to compare a first full-charge voltage obtained with the positive-electrode-side twin relay in a first state, the negative-electrode-side twin relay in a second state and the bypass twin relay in a first state, with a second full-charge voltage obtained with the positive-electrode-side twin relay in a second state, the negative-electrode-side twin relay in a first state and the bypass twin relay in the first state, and determines that negative-electrode-side insulation resistance is lowered when the second full-charge voltage is smaller and when degree of the smallness is great.


    Access

    Download


    Export, share and cite



    Title :

    Ground fault detection apparatus


    Contributors:

    Publication date :

    2020-09-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES



    GROUND FAULT DETECTION APPARATUS

    ARIMURA MICHIO | European Patent Office | 2025

    Free access

    GROUND FAULT DETECTION APPARATUS

    KAWAMURA YOSHIHIRO | European Patent Office | 2019

    Free access

    Ground fault detection apparatus

    KAWAMURA YOSHIHIRO | European Patent Office | 2020

    Free access

    GROUND FAULT DETECTION APPARATUS

    KAWAMURA YOSHIHIRO | European Patent Office | 2019

    Free access

    GROUND FAULT DETECTION APPARATUS

    KAWAMURA YOSHIHIRO | European Patent Office | 2019

    Free access