A brake system, a controller and a method for detecting a loss of ground connection in a controller for a vehicle are disclosed. The controller has a first unit and a second unit, and the first and/or the second unit comprise(s) a microcontroller. The first unit is connected to a first ground terminal by a first ground line and the second unit is connected to a second ground terminal by a second ground line. The controller comprises a single ground loss detection resistor arranged in the first or in the second ground line. The current in the first and/or the second ground line is ascertained and evaluated by the microcontroller in order to determine whether a loss of the connection has occurred at one of the ground terminals.

The present method relates to a method for checking a multi-pole electrical circuit breaker. The multi-pole electrical circuit breaker comprises a plurality of poles (101-103). Each of the plurality of poles (101-103) comprises a first connection (121-123) and a second connection (131-133). Closing the particular pole (101-103) makes it possible to electrically connect the first connection (121-123) of the particular pole (101-103) to the second connection (131-133) of the particular pole (101-103) via the pole. In the method, a plurality of micro-ohm measurements are carried out at the plurality of poles (101-103), while the plurality of poles (101-103) are earthed on both sides in a P-P-P-E configuration. A contact resistance of one of the plurality of poles (101-103) is determined on the basis of the plurality of micro-ohm measurements.

The present method relates to a method for checking a multi-pole electrical circuit breaker. The multi-pole electrical circuit breaker comprises a plurality of poles (101-103). Each of the plurality of poles (101-103) comprises a first connection (121-123) and a second connection (131-133). Closing the particular pole (101-103) makes it possible to electrically connect the first connection (121-123) of the particular pole (101-103) to the second connection (131-133) of the particular pole (101-103) via the pole. In the method, a plurality of micro-ohm measurements are carried out at the plurality of poles (101-103), while the plurality of poles (101-103) are earthed on both sides in a P-P-P-E configuration. A contact resistance of one of the plurality of poles (101-103) is determined on the basis of the plurality of micro-ohm measurements.

An electrical measuring device for measuring the resistance of an earth connection of an electrical facility. The device comprises at least: a first link to an earth connection of the masses of an electrical facility; a second link to a neutral conductor; an alternating current generator; and a control unit suitable for: instructing the generator to inject alternating current into the earth connection of the masses; measuring, between said first and second links, a voltage generated by said injected current; determining a resistance of the earth connection of the masses according to the injected current and the measured voltage; and emitting a first warning signal when said compared resistance exceeds said pre-determined threshold.

An electrical measuring device for measuring the resistance of an earth connection of an electrical facility. The device comprises at least: a first link to an earth connection of the masses of an electrical facility; a second link to a neutral conductor; an alternating current generator; and a control unit suitable for: instructing the generator to inject alternating current into the earth connection of the masses; measuring, between said first and second links, a voltage generated by said injected current; determining a resistance of the earth connection of the masses according to the injected current and the measured voltage; and emitting a first warning signal when said compared resistance exceeds said pre-determined threshold.

Equipment (1) for measuring the energy consumption of branches (11-N) of an electrical network (10) which comprises a single voltages measuring device (2) connected upstream of the branches of the network so as to measure the voltages of the network in a centralized manner, and several dedicated current measuring devices (3) connected to each branch of the network so as to measure the currents on the branches of the network. The measuring devices (2, 3) are connected by network cable (6) allowing digital communication of the voltage measurements to the current measuring devices (3), which comprises a processing unit (33) for calculating the energy consumption of the analyzed branch of the network. The voltage and current measurements are performed by sampling, and the sampling frequencies are compared and adjusted automatically so as to synchronize the current samples with the voltage samples.

Equipment (1) for measuring the energy consumption of branches (11-N) of an electrical network (10) which comprises a single voltages measuring device (2) connected upstream of the branches of the network so as to measure the voltages of the network in a centralized manner, and several dedicated current measuring devices (3) connected to each branch of the network so as to measure the currents on the branches of the network. The measuring devices (2, 3) are connected by network cable (6) allowing digital communication of the voltage measurements to the current measuring devices (3), which comprises a processing unit (33) for calculating the energy consumption of the analyzed branch of the network. The voltage and current measurements are performed by sampling, and the sampling frequencies are compared and adjusted automatically so as to synchronize the current samples with the voltage samples.

Ground Potential Rise (GPR) systems and methods with depth sensing measure the GPR between the ground grid and the remote earth. Methods and systems described herein may provide a GPR measurement to an existing distance protection. A GPR system may comprise a set of potential transformers. The set of potential transformers may be coupled to different ground rods driven into the earth at different depths, respectively. One wire of the high voltage side of the potential transformer may be coupled to the ground grid of a substation, and the second wire of the potential transformer may be coupled to an insulated wire that is coupled to a ground rod or multiple of ground rods bonded together. The low voltage side of the potential transformer is used to connect Distance Relays, Voltage Relays, DFR or Alarms.

A secure system for charging a battery of a motor vehicle from a power supply network, which system is in a vehicle and includes a mechanism measuring frequency of the network, an injection mechanism injecting current pulses into the network, a mechanism measuring voltage between the ground and a neutral of the network, an analog filter filtering the measured voltages at high frequencies, a digital filter filtering the analog-filtered voltages at low frequencies, and a mechanism determining resistance between the ground and the neutral of the network on the basis of the digitally filtered voltages and an amplitude of the current pulses. The digital filter includes a mean value filter which determines a mean value based on N voltage measurements spaced apart by a time interval T+T/N, where T is the period of the network determined by the mechanism measuring the frequency of the network.

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.