Abstract: An electronic leakage current device a low-voltage power line, comprising: a moving contact and a fixed contact which can be mutually coupled/uncoupled; first sensor means for detecting a earth leakage current and for generating an electric signal which is indicative of the value of the earth leakage current; first electronic means which are electrically connected to the first sensor means in order to generate an electric tripping signal depending on the electric signal which is indicative of the value of the earth leakage current, said first electronic means generating the electric tripping signal after a preset minimum time interval; and actuation means, operatively connected to the moving contact, in order to perform, in response to the electric tripping signal: the separation of the moving contact from the fixed contact.

Abstract: A low-voltage electronic residual current circuit breaker, comprising, a) at least one fixed contact and at least one movable contact, the movable contact coupling/uncoupling with respect to the fixed contact respectively during closure/opening of the circuit breaker; b) sensor means which are suitable to generate one or more electrical sensing signals that are indicative of the presence of an earth fault current; c) first electrinally connected to the sensor means, in order to generate, upon receiving the sensing signals, one or more electrical control signals, the first electronic means being electrically conected to release means that are operatively connected to the movable contact in order to uncouple it from the fixed contact, following reception of the one or more electrical control signals; and d) an electronic testing device that is electrically connected to the first sensor means and is suitable to simulate the presence of an earth fault current; whose particularity consists of the fact that said el

Abstract: An electronic earth leakage current device, comprising: a moving contact and a fixed contact which can be mutually coupled/uncoupled; and first sensor means for detecting an earth leakage current and for generating an electric signal which is indicative of the value of the earth leakage current; and first electronic means which are electrically connected to the first sensor means in order to generate, on the basis of the electric signal which is indicative of the value of the earth leakage current, an electric tripping signal; and actuation means, operatively connected to the moving contact, in order to perform, in response to an electric tripping signal, the separation of the moving contact from the fixed contact; Its particularity consists of the fact that it comprises: second sensor means for detecting one or more physical values which are indicative of the operating condition of the electronic device for protection against earth leakage current; and second electronic means, electrically connected t

Abstract: An electronic driving circuit for a bistable actuator activated by piezoelectric elements, particularly for residual-current devices, the circuit including a voltage step-up device suitable to step up and store a voltage generated across a secondary winding of a current sensor. The step-up device is connected to a threshold setting device suitable to determine an intervention threshold of a bistable actuator activated by piezoelectric elements, whose activation is determined by an excitation voltage applied across the bistable actuator which is higher than the voltage threshold set by the threshold setting device.