ELECTRONIC DRIVING CIRCUIT FOR A BISTABLE ACTUATOR

摘要

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