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:
May. 22, 2012
Filed:
Sep. 29, 2006
Applicants:
Arne Hjortsberg, Fislisbach, CH;
Jan Hajek, Ludvika, SE;
Inventors:
Arne Hjortsberg, Fislisbach, CH;
Jan Hajek, Ludvika, SE;
Assignee:
ABB Technology Ltd., Zürich, CH;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01F 27/24 (2006.01); H01F 17/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
An oil filled high power transformer for high voltages with coils. The transformer including a number of stacked layers of, in the main concentric, insulated conductors forming transformer coils. The winding layers are separated by spacers. One or more spacers are provided with at least one integrated electrical discharge barrier extending off the central body of the spacer in the vicinity of the area where the spacer is in contact with a winding. Breakdown along spacer and alongside the spacer-oil interface is reduced getting improved breakdown strength of the oil filled transformer.