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:
Mar. 30, 2004
Filed:
Jul. 23, 2002
Max Hobelsberger, Wuerenlingen, CH;
Ingo Kirchhofff, Zurich, CH;
René Kohler, Schinznach-Bad, CH;
Zlatimir Posedel, Neuenhof, CH;
ALSTOM Technology Ltd, Baden, CH;
Abstract
A protective and monitoring apparatus ( ) for monitoring and reducing shaft currents and shaft voltages on the generator shaft ( ) of a generator ( ) which produces electrical power, which protective and monitoring device ( ) is connected between a contact apparatus ( ), which makes contact with the generator shaft ( ), and a grounding connection ( ) and comprises a parallel circuit formed by a resistance and a capacitance, with one end of the parallel circuit ( ) being connected to the contact apparatus ( ) and its other end being connected to the grounding connection ( ), said parallel circuit being protected against overvoltages on the generator shaft ( ) and means ( ) being provided for bridging the parallel circuit ( ) when an overvoltage occurs.