Abb S.p.a.

Abb Service S.r.l.

Abb Services S.r.l.

Francesco Viaro

Marco Stucchi

Federico Gamba

Romano Manzoli

Francesco Casalinuovo

A protection device for circuit-breakers that comprises a wireless communication system for transmitting locally, to a dedicated computerized device, information corresponding to measurements of electrical quantities, to the setting of the parameters typical of the protection functions, or to diagnostics information corresponding to the electrical system, to the circuit-breaker or to the protection device itself.

Electronic protection devices for circuit-breakers and corresponding programming method

The present invention is related to a device () for the detection of direct and/or alternating current to be used in the realization of highly sensitive amperometric measuring instruments or for the detection of differential faults along with automatic switches. The inventive device comprises a magnetic core () disposed in such a manner to surround at least one current-carrying conductor (). A winding () surrounds the magnetic core () and is electrically connected to an electrical resistance (). A voltage source () generates a drive voltage (Vexcit) which permits the circulation of a pick-up current (Iexcit) in the said winding () and in the said core (). Amplification means () are used to detect the voltage (Vsense) at the terminals of the resistance () in order to generate a first signal (Vamp) which is representative of the above defined current (Iexcit). The inventive device () also comprises a feedback adjustment circuit block () which acquires the first input signal (Vamp) in order to generate a second signal which inverts the said drive voltage (Vexcit) when the pick-up current (Iexcit) reaches preset values.

Device for the reading of direct and/or alternating currents

An electronic self-supplied protection device for automatic circuit-breakers that includes: a supply device that draws energy from the stretch of electrical network protected by said circuit-breaker; a control device with at least two levels of operation, where the first of the at least two levels of operation being associated to the function of protection from instantaneous short-circuit SCinst. In addition, second and possible further levels of operation of the self-supplied protection device are associated with further functions of said protection device; a selective interface device including means for regulating the supply, which, in a first step, immediately following upon closing of the circuit by the circuit-breaker, supply the first level of operation, and, after a controlled period of time, supply also the second and possible further levels of operation of said control device.

Self-supplied electronic protection device for automatic circuit-breakers

Described herein is an electronic protection device for automatic circuit-breakers comprising: a control unit; a warning interface; a supply system comprising a main supply system and a first back-up supply system; an interface for connection between said supply system and said control unit, said connection interface comprising an automatic device for passage from the main supply to the back-up supply in the event of interruption of said main supply.

Electronic protection devices for automatic circuit-breakers

A device and method for current measurement in a conductor and, in particular, a method to feed the devices of the invention in order to interpret the information provided. The method is based on the exploitation of discrete sampling of the information provided from the devices of the invention and allows the feeding of these devices to be modulated in order to activate the devices only when necessary.

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Albino, Italy

Francesco Viaro