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:
Sep. 08, 2015
Filed:
Jun. 06, 2011
Applicant:
Bengt-olof Stenestam, Ludvika, SE;
Inventor:
Bengt-Olof Stenestam, Ludvika, SE;
Assignee:
ABB TECHNOLOGY LTD., , CH;
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/00 (2006.01); G05B 19/042 (2006.01); G01R 31/02 (2006.01);
U.S. Cl.
CPC ...
G05B 19/0428 (2013.01); G01R 31/027 (2013.01); G05B 2219/24042 (2013.01);
Abstract
A method and a device for diagnosing the status of an electrical apparatus having a sealed fluid based insulating system. The device includes at least one input for receiving measurements of a current running through the apparatus and measurements of an actual apparatus fluid pressure as well as a diagnosing unit. The diagnosing unit determines a corresponding theoretical apparatus fluid pressure based on the measured current, compares the actual apparatus fluid pressure with the theoretical apparatus fluid pressure and diagnoses the status of the apparatus based on the comparison.