Abstract: A device for measuring resistance of a ground tap and a charger for an on-board vehicle including the device. The device includes a current source and an ammeter disposed on a first electrical branch, provided to link a phase of a power supply network with the ground of the installation; a second electrical branch provided to link a neutral wire of the power supply network with the ground of the installation, including a resistor across terminals of which is connected a voltmeter, and a first capacitor in series with the resistor; and a third electrical branch is provided for linking the neutral wire of the network with the ground of the installation, and including, on the third branch, in parallel with the first capacitor and with the first resistor, a second capacitor of higher value than the first capacitor.

Abstract: A system for charging a motor vehicle battery, configured to be connected to a first multiphase power supply network or to a second multiphase or single phase power supply network of which the power is lower than that of the first network, including: a filtering stage including plural capacitors; a first rectifier stage including switches; and an inverter stage configured to be connected to the battery. The charging system includes: a second rectifier stage including plural switches, and configured to be connected between the power supply network and the battery, in parallel with the filtering stage and at least a portion of the first rectifier stage; and a capacitor of which the capacity is lower than that of the capacitors of the filtering stage, connected between two phases or between a phase and a neutral of the second power supply network.

Abstract: A device for measuring resistance of a ground tap and a charger for an on-board vehicle including the device. The device includes a current source and an ammeter disposed on a first electrical branch, provided to link a phase of a power supply network with the ground of the installation; a second electrical branch provided to link a neutral wire of the power supply network with the ground of the installation, including a resistor across terminals of which is connected a voltmeter, and a first capacitor in series with the resistor; and a third electrical branch is provided for linking the neutral wire of the network with the ground of the installation, and including, on the third branch, in parallel with the first capacitor and with the first resistor, a second capacitor of higher value than the first capacitor.