The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 2022
Filed:
Feb. 27, 2020
Abb Schweiz Ag, Baden, CH;
Magnus Backman, Västerås, SE;
Elisabeth Lindell, Västerås, SE;
Andrea Bianco, Sesto San Giovanni, IT;
ABB Schweiz AG, Baden, CH;
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 () and comprises measuring (S) a reference signal as a function of time for a circuit breaker () connected to an inductive load (), obtaining (S) an indication of a power factor of the inductive load through the circuit breaker, determining (S) an arcing time for opening of the circuit breaker, the arcing time being dependent on the obtained indication of a power factor, predicting (S) a zero crossing of a current through the circuit breaker based on the measured reference signal, and providing (S) 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.