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. 08, 2015
Filed:
May. 20, 2014
Rongsheng Liu, Vasteras, SE;
Rongsheng Liu, Vasteras, SE;
ABB Research Ltd., , CH;
Abstract
A direct current transmission system and a method for preparation including an electrical conductor layer, an inner semiconductive layer covering the conductor layer, an insulation layer provided on the semi-conductive layer including laminated polymer material and impregnated with a high viscosity fluid, and including an inner part, a middle part, an outer part, and an outer semi-conductive layer covering the insulation layer. The inner part has a first thickness, the middle part has a second thickness and the outer part has a third thickness, whereby the second thickness is greater than the first thickness and greater than the third thickness. The laminated polymer material within each part has a constant thickness and constant ratio of polymer to laminated material and wherein at least one of the parts has a thickness ratio of less than 35%.