Patent · US Active

On-load tap changer for dry transformers and dry transformer

US9766641B2 · kind B2 · utility

0Cited by

4References

12Claims

0Family size

Assignee

ABB Schweiz AG · CH

Inventors

Martin Carlen · Niederrohrdorf, CH
Jens Tepper · Wolfenbüttel, DE
Benjamin Weber · Winterberg, DE

Key dates

Filing date	Jul 24, 2015
Grant date	Sep 19, 2017
Priority date	—
Expiry date	Jul 24, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2009/0022
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An on-load tap-changer for dry transformers, having an electric insulating hollow casing extending around a virtual axis, wherein several electric contact sections are foreseen along a path on the inner surface of the hollow casing, which are electrically joined through the wall of the hollow casing and a selector contact in the inner of the cylinder which is moveable along the path and that's outer end is selectively connectable with one of the contact sections by a respective movement. Respective cables are foreseen to electrically connect the contact sections from the radial outer side of the hollow casing, wherein at least some of the cables have a respective surrounding outer insulation at least at their respective connected end.

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