Remote protection and switching device for electrical systems

A remotely controlled electronic general switch in a direct current (DC) electrical power supply system, for ensuring a switching function and a control function of a power supply current and voltage, the general switch comprising an electronic module comprising:

• a power input;
• a power output;
• an electronic circuit breaker or switching circuit, connected to the power input;
• a measurement circuit including a contactless current sensor and a voltage sensor, the measurement circuit being connected in series between the switching circuit and the power output;
• a communication interface connected to a bidirectional communications bus;
• a controller or processor connected to the switching circuit and to the measurement circuit, the controller being configured such that, when the controller receives an input voltage and a current measurement from the measurement circuit, the controller is respectively capable of verifying whether the input voltage is in a predetermined interval and of controlling a current interruption using the switching circuit during a certain period, depending on a value of the current measurement, and the controller being connected to the communication interface, the communication interface being connected to the bidirectional communications bus and the controller bidirectionally, such that the controller can be remotely programmed;
• and
• an addressing bus to which the controller is also connected, allowing selection, among several, of a particular power supply system connected to the general switch,
• wherein the controller and the measurement circuit are bidirectionally linked, and
• wherein the measurement circuit includes a winding which allows the controller to inject a test signal detectable using the current sensor and enables verification of proper sensor operation at each system ignition and/or determination of sensor accuracy.