Abb Schweiz Ag

Abb S.p.a.

Abb E-mobility B.v.

Luca Ghezzi

Paolo Antonello

Agostino Butti

Vittorio Cozzi

Yu Du

Yannick Maret

Gertjan Koolen

Taosha Jiang

Adrian Hozoi

Rostan Rodrigues

Antonio Currá

Matija Varga

Fabio Vallarino

Antonio Currà

Ulf Embretsen

A calibration method for calibrating a magnetizable core, wherein the magnetizable core is coupled to a magnetic transducer; the method comprising applying a pulse of magnetomotive force to the core such that a distinct value of remanence is produced in the core, wherein the value of remanence in the core depends on a strength of the pulse.

Method and system for improved current sensor

An arc fault detection device for detecting an arc fault in an electric line includes a first terminal and a second terminal for connecting the arc fault detection device to a conductor of the electric line. A sensor is adapted for generating a sensor signal from a current through the electric line; and a controller is adapted for detecting the arc fault from the sensor signal. The sensor includes an inductor connected to the first terminal and the second terminal and a capacitor connected in parallel with the inductor. The inductor and the capacitor form a resonant circuit with a resonance frequency, the resonance frequency determining an impedance behavior of the resonant circuit; wherein the inductor and the capacitor are chosen such that the impedance behavior of the resonant circuit corresponds to a desired impedance behavior over a relevant frequency range of the current through the electric line.

Arc fault detection device with wideband sensor

Solid state switching device including: a pair of line terminals including first and second line terminals for electrical connection with a corresponding phase conductor of an electric line; a switching assembly including one or more solid state power switches, the switching assembly having a first and second power terminals electrically connected with the first and second lines terminals, respectively; a heat sink element in thermal coupling with the switching assembly to adsorb heat from the switching assembly; an additional heat extraction arrangement to extract heat from the switching assembly and convey at least a portion of the adsorbed heat along the phase conductor through the first and second line terminals.

Solid state switching device

An electronic protection device for a LV electric line, the protection device being provided with a control unit comprising a controller including digital data processing resources clocked by a first clock source adapted to provide a first flock signal with a first nominal clock frequency. The control unit comprises a clock testing arrangement adapted to check whether the first clock source is properly operating.

Low voltage protection device with clock testing

An electronic device () for measuring a differential current (ID) in an electric line () having a plurality of conductors, said electronic device comprising: a sensing circuit () comprising: a current transformer () having a magnetic core () through which the conductors of said electric line pass, a secondary winding () and an excitation winding () along which an excitation current (IE) circulates to polarize said magnetic core (); an output circuit section () electrically connected to said secondary winding () and configured to provide a first signal (V). The electronic device () further comprises: a first signal processing block () configured to process said first signal (V) and provide a second signal (VD) indicative of said differential current (ID); a second signal processing block () configured to process said second signal (VD) and provide a first measurement signal (IDCM) indicative of the absolute value of a time-invariant component of said differential current (ID); a third signal processing block () configured to process said first signal (V) and provide third and fourth signals (S, S) indicating whether said magnetic core () operates in a positive and/or in a negative saturation region of the hysteresis loop of said magnetic core; a fourth signal processing block () configured to process said third and fourth signals (S, S) and provide a second measurement signal (SDC) indicative of the direction of the time-invariant component of said differential current (ID).

Electronic device for measuring a differential current in an electric line

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Gallarate, Italy

Luca Ghezzi