A ground fault detection device (100) includes: a detection capacitor (C1); a switch group (S1-S4) for switching between a first charging path connecting the battery (300) and the detection capacitor, a second charging path connecting the battery, a negative side insulation resistance (RLn) and the detection capacitor, a third charging path connecting the battery, a positive side insulation resistance (RLp) and the detection capacitor, and a measurement path for measuring a charging voltage of the detection capacitor; and a controller (110) configured to calculate the insulation resistance based on a charging voltage measured value of the detection capacitor which exists after charging each of the charging paths, wherein after measurement of the charging voltage of the second charging path, the controller is configured to cause the switch group to switch to the third charging path before switching to the first charging path.
GROUND FAULT DETECTION DEVICE
ERDSCHLUSSDETEKTIONSVORRICHTUNG
DISPOSITIF DE DÉTECTION DE DÉFAUT DE TERRE
2023-08-02
Patent
Electronic Resource
English