公开(公告)号：US11686758B2

公开(公告)日：2023-06-27

申请号：US17484055

申请日：2021-09-24

Applicant: ABB Schweiz AG

Inventor： Matija Varga ,  Yannick Maret ,  Agostino Butti ,  Antonio Currà ,  Vittorio Cozzi ,  Luca Ghezzi

IPC: G01R31/08 ,  G01R31/12 ,  H02H1/00 ,  H02H3/16

CPC classification number: G01R31/085 ,  G01R31/08 ,  G01R31/1272 ,  H02H1/0015 ,  H02H3/16

Abstract: 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.

公开(公告)号：US20220091172A1

公开(公告)日：2022-03-24

申请号：US17484055

申请日：2021-09-24

Applicant: ABB Schweiz AG

Inventor： Matija Varga ,  Yannick Maret ,  Agostino Butti ,  Antonio Currà ,  Vittorio Cozzi ,  Luca Ghezzi

IPC: G01R31/08 ,  G01R31/12 ,  H02H1/00 ,  H02H3/16

Abstract: 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.

公开(公告)号：US20230019486A1

公开(公告)日：2023-01-19

申请号：US17866385

申请日：2022-07-15

Applicant: ABB Schweiz AG

Inventor： Martin Zlatanski ,  Yannick Maret ,  Wojciech Piasecki ,  Matija Varga

IPC: G01R31/327

Abstract: A circuit breaker is connected between an input supply line and an output supply line of a low-voltage electrical system and comprises a test signal transceiver and evaluator. The test signal transceiver comprises a first transceiver section being capacitively or inductively coupled, at a first coupling point, with the input supply line, and a second transceiver section being inductively coupled, at a second coupling point, with the input or output supply line. One of the first and second transceiver section is a test signal transmitter configured to generate and inject an AC test signal into the input or output supply line, and the other one of the first and second transceiver section is a test signal receiver configured to receive the test signal from the input or output supply line. A test signal evaluator is configured to determine the state of the circuit breaker from the received test signal.