Patent · US Active

On-load tap changer

US9373442B2 · kind B2 · utility

0Cited by

3References

8Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Wolfgang Albrecht · Wenzenbach, DE
Christian Hammer · Regensburg, DE
Christian Kotz · Wien, AT
Sebastian Rehkopf · Regensburg, DE
Andreas Sachsenhausen · Mallersdorf-Pfaffenberg, DE

Key dates

Filing date	Feb 23, 2011
Grant date	Jun 21, 2016
Priority date	—
Expiry date	Jun 11, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH01H9/0038
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to an on-load tap changer for step transformers, which has one main current branch and one auxiliary current branch for each of the two winding taps to be switched. In each main current branch and auxiliary current branch, switching is accomplished by means of a vacuum switching tube. According to the invention, an additional mechanical contact is provided in each of the main current branches and in each of the auxiliary current branches between the respective winding tap to which said branch is electrically connected and the respective vacuum switching tube in said branch. Said mechanical contacts are switched in such a way that the vacuum switching tubes in the main current branch and the auxiliary current branch of the unconnected winding tap can be galvanically isolated from the unconnected winding tap.

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