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:
Aug. 18, 2009
Filed:
May. 14, 2007
Burkhard Müller, Kassel, DE;
Burkhard Müller, Kassel, DE;
SMA Solar Technology AG, Niestetal, DE;
Abstract
The measuring array with an earth connection point () for determining the insulation resistance (R) of an energized electrical apparatus or of an installation with a supply voltage Uwith a positive pole () and a negative pole (), two switches (S, S) or a corresponding two-way switch being provided for creating a current path between one of the two poles and said earth connection point () in order to determine the insulation resistance (R) generally obtained when one or a plurality of insulation faults occur at any potential reference, two measurements being performed one after the other for determining the insulation resistance, the first switch (S) being closed and the second switch (S) open during the first of these two measurements and the first switch (S) being open and the second switch (S) closed during the second of these measurements.