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:
Jan. 16, 2018
Filed:
Dec. 23, 2014
Fronius International Gmbh, Pettenbach, AT;
Friedrich Oberzaucher, Wels, AT;
Gerhard Reiter, Laakirchen, AT;
FRONIUS INTERNATIONAL GMBH, Research Triangle Park, NC (US);
Abstract
Method and device for determining an insulation resistance Rof a photovoltaic system () with respect to earth potential (EP), comprising a DC-DC converter unit () which converts a first DC voltage generated by the photovoltaic generator () into a second DC voltage which is applied to an intermediate circuit () that temporarily stores the electrical energy, supplied by the photovoltaic generator (), for a DC-AC converter unit () connected thereto, wherein the intermediate circuit () contains a reference node (BK) having an adjustable reference potential (BP), and comprising a measuring unit () which picks up the measuring voltages between the reference potential (BP) and the earth potential (EP) at different reference potentials (BP), and an evaluation unit () which evaluates the measuring voltages that have been picked up in order to determine the insulation resistance of the photovoltaic generator () of the photovoltaic system ().