Schneider Electric Industries Sas

Maxime Gaillard

Olivier Coutelou

Christophe Mollier

Damien Sillans

An electronic device for monitoring an electrical quantity out of a voltage and arc intensity relative to an alternating current flowing in an electrical conductor, includes a measurement module configured to measure at least one value of the electrical quantity, a wireless transceiver, and a transmission module linked to the wireless transceiver. The monitoring device furthermore includes a computation module configured to compute at least one parameter for monitoring the electrical quantity as a function of at least one measured value of the electrical quantity, each monitoring parameter being chosen from an angular phase of the electrical quantity and a modulus of the electrical quantity, the transmission module being configured to transmit, to another electronic device, a data message containing at least one computed monitoring parameter.

Device and method for monitoring a voltage or a current, associated system for monitoring an electrical switchboard, electrical enclosure and transformer station

This system comprises a first device comprising a member for measuring voltage of a primary conductor, means for sampling the measured voltage, means for transmitting a first message, and means for determining a set of variable values representative of the voltage, based on the voltage measured during a given transmission period; at least one second device having a current sensor for determining intensity in a secondary conductor connected to the primary conductor, means for sampling the measured intensity; and a member for calculating said energy, including means for receiving the first message and being configured for calculating an energy during the given transmission period on the basis of said data set and intensity samples associated with the given transmission period. The determination means are configured for determining said data set based on a correction coefficient which depends on a value representative of the voltage only for each voltage period where said value is greater than a threshold.

Electric power calculation system, electric cabinet comprising one such system, associated transformer substation and calculation method

The system () according to the invention for calculating an electric quantity relative to an electrical installation comprising several secondary electrical conductors (A, . . . ,C) electrically connected to a primary electrical conductor (). This system comprises a first module () including a wireless transmitter () and a plurality of second modules (A,B,C). Each second module includes first means (A,A;B,B;C,C) for receiving a first synchronization message (M1) and second transmission means (A, . . . ,C) for sending a second message (M2A, M2B, M2C) containing at least one intensity value measured by the corresponding current sensor to a third module (). The intensity values are measured quasi-simultaneously and the third module includes a unit () for calculating the electric quantity from intensity values received via said second messages.

System for calculating an electric quantity, transformer sub-station comprising such a system and method for calculating an electric quantity with such a system

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Gieres, France

Maxime Gaillard