Patent · US Active

High voltage insulation system and a method of manufacturing same

US7994427B2 · kind B2 · utility

1Cited by

7References

7Claims

0Family size

Assignee

ABB TECHNOLOGY AG · CH

Inventors

Mats Berglund · Ludvika, SE
Lars-Åke Svensson · Ludvika, SE
Tony Polander · Växjö, SE
Gunnar Jorendal · Ludvika, SE
Erik Forsberg · Los Angeles, US
Lars-Erik Vennerberg · Ludvika, SE

Key dates

Filing date	Mar 24, 2007
Grant date	Aug 9, 2011
Priority date	—
Expiry date	Mar 24, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/4902
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A high voltage insulation system for high-voltage direct current including a bushing, a conductor, a transformer conductor, and a connection between the conductor and the transformer conductor. A conductive shielding electrode shields the connection between the bushing and transformer. A surrounding insulation system is immersed in transformer oil. The surrounding insulation system includes transformer insulation material and bushing insulation material. A cylindrical solid insulation barrier encloses the connection between the bushing conductor and transformer conductor. At least one solid insulation barrier is fastened on the outer side of the shielding electrode. The at least one solid insulation barrier extends in an axial direction outside the axial direction of the shielding electrode and forms a distance to the insulation material of the bushing and the insulation material of the transformer, whereby a moderate voltage drop over the solid insulation barrier is obtained.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.