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. 03, 2010
Filed:
Mar. 03, 2005
Timothy J. Fawcett, East Staffs, GB;
Timothy J. Fawcett, East Staffs, GB;
Hubbell Incorporated, Orange, CT (US);
Abstract
A method and apparatus for characterizing a three phase transformer () using a single phase power supply (). Pairs of input terminals (H-H) of the transformer are sequentially energized for each energization and the voltage between pairs of output terminals (x-x) of the transformer are measured. Measured voltages are processed in order to characterize the winding configuration of the transformer. Either simultaneously or subsequently the presence of neutrals on the primary and/or secondary side of the transformer are identified to enable the winding configuration to be further characterized. Subsequently any phase displacement of the transformer is determined. The apparatus comprises means () for selectively applying a single phase power supply () to pairs of terminals (H-H) on the transformer () and for measuring voltages between pairs of terminals (x-x) of the transformer and for measuring phase difference between the primary and secondary sides of the transformer all under automatic control of a control means () which includes a processing means to process measured voltages and phase differences in order to characterize the transformer.