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. 20, 2011
Filed:
Apr. 09, 2009
Ari Wahlroos, Vaasa, FI;
Janne Altonen, Toijala, FI;
Ari Wahlroos, Vaasa, FI;
Janne Altonen, Toijala, FI;
ABB Technology AG, Zurich, CH;
Abstract
A method and apparatus for determining a distance of a phase-to-phase fault or a three-phase fault on a three-phase electric line, the apparatus () being configured to determine a first estimate value for a distance between the measuring point () and a point (F) of fault on the basis of a first equation based on a fault loop model in which the point of fault is located between the measuring point and load of the electric line, and a second estimate value for the distance on the basis of a second equation based on a fault loop model in which the load of the electric line is located between the measuring point and the point of fault, and to select according to predetermined criteria one of the determined two estimate values as the distance between the measuring point () and the point of fault (F).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile