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:
Oct. 06, 2026
Filed:
Feb. 08, 2023
Hitachi Energy Ltd, Zürich, CH;
Nilanga Abeywickrama, Västerås, SE;
Tord Bengtsson, Västerås, SE;
Cecilia Forssen, Västerås, SE;
Joachim Schiessling, Enköping, SE;
Hitachi Energy Ltd, Zürich, CH;
Abstract
A method for monitoring a transformer comprising a tap changer, wherein extracted information comprises a circulating current amplitude and/or a circulating current time covering at least a part of the tap change operation represented by at least one current difference waveform, and/or a transition current time covering at least a part of the tap change operation represented by at least one power loss waveform.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile