Abb S.p.a.

Abb Ricerca Spa

Abb Schweiz Ag

Franco Colombo

Paolo Antonello

Salvatore Brandonisio

Walter Turati

Angelo Manara

Donato Colonna

Carlo Morlacchi

Claudio Ascari

Claudio Amadori

The present invention refers to a low voltage circuit breaker with a control device for re-closing said low voltage circuit breaker. The control device is provided with an actuating element, comprising a shape memory material and operatively associated with maneuvering means for the circuit breaker. When this shape memory material performs a state transition, the actuating element causes the movement of said maneuvering means from a first operative position, associated with an open configuration of the circuit breaker, to a second operative position, associated with a closed configuration of the circuit breaker.

Low voltage circuit breaker with a control device for re-closing said low voltage circuit breaker

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.

Electronic driving circuit for a bistable actuator

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Malnate, Italy

Franco Colombo