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. 17, 2002
Filed:
Sep. 08, 1999
Toshio Sohde, Yokohama, JP;
Takashi Sakurai, Saitama, JP;
Kabushiki Kaisha Meidensha, Tokyo, JP;
Abstract
An apparatus and method applicable to an electric power distribution installation, the electrical power distribution installation comprising: at least one main common bus bar; a plurality of main transformers, each main transformer being configured to step down a received power supply voltage and to supply the stepped down power supply voltage to a load via the main common bus bar; and a plurality of power generators, each power generator being connected to the main common bus bar, and the apparatus comprising: a first grounding device including at least one grounding transformer connected to the main common bus bar, a neutral point of the grounding transformer being grounded in a form of a predetermined low impedance grounding; and a second grounding device connected to each neutral point of the power generators to always ground each neutral point directly in a form of a predetermined high resistance grounding.