DEVICE AND METHOD FOR MONITORING THE STATE OF A PROTECTION OR POWER SUPPLY CIRCUIT IN AN ELECTRIC POWER DISTRIBUTION CIRCUIT OR NETWORK, AND CORRESPONDING DISTRIBUTION NETWORK AND CIRCUIT

摘要

The invention relates to a device and a method for monitoring the state of an electrical circuit supplied with electrical energy by an electrical energy source, such as a circuit for protection against electrical overloads at the output of an electrical energy source in an electrical energy distribution network, or an electrical power supply circuit of an electronic apparatus at the output of the electrical energy source in an electrical energy distribution circuit. This monitoring device comprises means for measuring an electrical quantity, such as the electrical energy, associated with the electrical circuit supplied by the electrical energy source, the measurement means comprising a power supply circuit 14 able to generate an electrical power supply current and a measurement circuit, for example of Rogowski type, able to measure the electrical quantity associated with the power supply circuit 14. This power supply circuit 14 comprises detection means 20 able to detect the absence or the presence of current in the electrical circuit by measuring the voltage across the terminals of the power supply circuit 14. + 0 0 ~~ -o /~; - ------------ -- ---- - - --------