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:
Dec. 30, 2025
Filed:
Feb. 13, 2024
Abb Schweiz Ag, Baden, CH;
Elisabeth Lindell, Västerås, SE;
Stefan Halen, Västerås, SE;
ABB Schweiz AG, Baden, CH;
Abstract
A method of performing a circuit opening and closing operation in a power system including three phases, a three-phase transformer, and a circuit breaker system, the method including a) opening all three phases simultaneously such that a reference current of a reference phase is interrupted first at a first current zero crossing after the opening; and b) closing all three phases simultaneously at a phase to ground voltage of the phase lagging the reference phase by 120°, in a time range of ±90° from a negative peak of said phase to ground voltage if the current zero crossing is a positive current zero crossing, or in a time range of ±90° from a positive peak of said phase to ground voltage if the current zero crossing is a negative current zero crossing.