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:
Apr. 07, 2009
Filed:
May. 09, 2006
Janne Altonen, Toijala, FI;
Ari Wahlroos, Vaasa, FI;
Janne Altonen, Toijala, FI;
Ari Wahlroos, Vaasa, FI;
ABB OY, Helsinki, FI;
Abstract
A method and system for determining a location of a phase-to-earth fault in a three-phase electric line of an electric network, the system being configured to monitor current and voltage quantities of the three-phase electric line at a measuring point and calculate a distance (d) between the measuring point and a point of fault (F) using an equation relating the current and voltage quantities to the distance, wherein the system is further configured to calculate load-compensated zero and negative sequence currents, calculate a load-compensated phase voltage of the faulted phase by using the compensated zero sequence current; and use the compensated negative sequence current and the compensated phase voltage for calculating the distance (d) between the measuring point and a point of fault (F).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile