Patent · US Active

Tap changer and vacuum switching tube for such a tap changer

US9165726B2 · kind B2 · utility

5Cited by

1References

6Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Dieter Dohnal · Lappersdorf, DE
Klaus Hoepfl · Maxhütte-Haidhof, DE
Christian Pircher · Lappersdorf, DE
Silke Wrede · Zeitlarn, DE

Key dates

Filing date	Sep 2, 2011
Grant date	Oct 20, 2015
Priority date	—
Expiry date	Jan 9, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH01H33/6647
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A tap changer for uninterrupted switching over between winding taps of a tapped transformer has two load branches each for a respective phase to be switched. Each load branch has a vacuum switching contact acting as main contact and parallel thereto at least one series connection of a switch-over resistance and a respective further vacuum switching contact. The two load branches are connected with a common load shunt or connectable by mechanical switching elements. Two respective vacuum switching contacts of each load branch are constructionally combined to form a single vacuum switching tube with two separate movable contacts actuatable independently of one another and a common fixed contact. The common fixed contact is connected with the common load shunt or connectable mechanical switching contacts.

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