公开(公告)号：US11257636B2

公开(公告)日：2022-02-22

申请号：US16803165

申请日：2020-02-27

Applicant: ABB Schweiz AG

Inventor： Magnus Backman ,  Elisabeth Lindell ,  Andrea Bianco

IPC: H01H9/56 ,  H01H33/59 ,  H02H3/02

Abstract: A method for synchronizing opening of a circuit breaker is presented. The circuit breaker is arranged to interrupt a current to an inductive load. The method is performed in a control device (2) and comprises measuring (S100) a reference signal as a function of time for a circuit breaker (1) connected to an inductive load (5), obtaining (S110) an indication of a power factor of the inductive load through the circuit breaker, determining (S120) an arcing time for opening of the circuit breaker, the arcing time being dependent on the obtained indication of a power factor, predicting (S130) a zero crossing of a current through the circuit breaker based on the measured reference signal, and providing (S140) contact separation of a contact pair of the circuit breaker at a point of time before the predicted zero crossing, the point of time being determined by the determined arcing time and the predicted zero crossing. A control device, a circuit breaker arrangement, and a computer program for synchronizing opening of a circuit breaker are also presented.

公开(公告)号：US10002722B2

公开(公告)日：2018-06-19

申请号：US15551807

申请日：2016-02-19

Applicant: ABB Schweiz AG

Inventor： Magnus Backman ,  Stefan Valdemarsson

IPC: H01H9/54 ,  H01H9/30 ,  H01H33/04 ,  H02H3/087 ,  H01H33/59 ,  H02H3/08 ,  H02H3/02

CPC classification number: H01H9/542 ,  H01H9/30 ,  H01H33/04 ,  H01H33/596 ,  H01H2009/543 ,  H02H3/02 ,  H02H3/021 ,  H02H3/08 ,  H02H3/081 ,  H02H3/087

Abstract: A switching system for breaking a current, including a contact arrangement having a first and second terminals, a resonance circuit connectable across the contact arrangement, In the closed state the first switch enables current to flow through the resonance circuit in a first flow direction and into the contact arrangement in a direction opposite to a contact arrangement arc current flow direction. A second switch connected to the resonance circuit and to the second terminal. In the closed state the second switch enables current to flow through the resonance circuit in a second flow direction opposite to the first flow direction. A control system arranged to alternatingly set the first and second switches in the closed state and then in the open state upon a current breaking operation, until a current pulse, emanating from energy supplied by a contact arrangement arc current, flowing through the resonance circuit and into the contact arrangement reaches an amplitude which is equal to or greater than a magnitude of a contact arrangement arc current.

公开(公告)号：US20200328039A1

公开(公告)日：2020-10-15

申请号：US16803165

申请日：2020-02-27

Applicant: ABB Schweiz AG

Inventor： Magnus Backman ,  Elisabeth Lindell ,  Andrea Bianco

IPC: H01H9/56 ,  H01H33/59

Abstract: A method for synchronizing opening of a circuit breaker is presented. The circuit breaker is arranged to interrupt a current to an inductive load. The method is performed in a control device (2) and comprises measuring (S100) a reference signal as a function of time for a circuit breaker (1) connected to an inductive load (5), obtaining (S110) an indication of a power factor of the inductive load through the circuit breaker, determining (S120) an arcing time for opening of the circuit breaker, the arcing time being dependent on the obtained indication of a power factor, predicting (S130) a zero crossing of a current through the circuit breaker based on the measured reference signal, and providing (S140) contact separation of a contact pair of the circuit breaker at a point of time before the predicted zero crossing, the point of time being determined by the determined arcing time and the predicted zero crossing. A control device, a circuit breaker arrangement, and a computer program for synchronizing opening of a circuit breaker are also presented.