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. 28, 2004
Filed:
Sep. 19, 2002
Applicant:
Inventors:
James Frederick Lau, Orlando, FL (US);
Abraham Nieves, Orlando, FL (US);
Assignee:
Siemens Westinghouse Power Corporation, Orlando, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 5/28 ;
U.S. Cl.
CPC ...
G01B 5/28 ;
Abstract
The present invention monitors an electrical generator ( ) to provide an indication of a problem in the generator's bearing insulation ( ), such as insulation damage or insulation bridging, and sets an alarm to warn an operator of the problem, thereby avoiding damage to the electrical generator ( ). Methods and systems consistent with the present invention identify problems with bearing insulation ( ) by monitoring the naturally occurring shaft voltage on the generator rotor ( ) and by setting an alarm if the shaft voltage drops below a predetermined value.