In order to quickly and accurately diagnose the failure of a coupling capacitor of an earth leakage detection device, voltage output unit (11a, OP1) generates a periodically changing periodic voltage and applies the periodic voltage to the other end of coupling capacitor (Cc) via first resistor (R1). Second resistor (R2) and third resistor (R3) are connected in series between a connection point between coupling capacitor (Cc) and first resistor (R1), and a predetermined fixed potential. Voltage measurement unit (11b) measures a voltage at a voltage dividing point between second resistor (R2) and third resistor (R3). Diagnosis unit (11d) determines whether or not coupling capacitor (Cc) is normal based on a voltage measured when switch (MRp, MRm, MRpp) is turned on in a state where voltage output unit (11a, OP1) outputs a fixed voltage.


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    Titel :

    EARTH LEAKAGE DETECTION DEVICE AND VEHICLE POWER SUPPLY SYSTEM


    Weitere Titelangaben:

    ERDLECKERKENNUNGSVORRICHTUNG UND STROMVERSORGUNGSSYSTEM FÜR EIN FAHRZEUG
    DISPOSITIF DE DÉTECTION DE FUITE À LA TERRE ET SYSTÈME D'ALIMENTATION ÉLECTRIQUE DE VÉHICULE


    Beteiligte:

    Erscheinungsdatum :

    2023-01-18


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES



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