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:
Oct. 20, 2015
Filed:
Sep. 02, 2011
Dieter Dohnal, Lappersdorf, DE;
Klaus Hoepfl, Maxhuette-Haidhof, DE;
Christian Pircher, Lappersdorf, DE;
Silke Wrede, Zeitlarn, DE;
Dieter Dohnal, Lappersdorf, DE;
Klaus Hoepfl, Maxhuette-Haidhof, DE;
Christian Pircher, Lappersdorf, DE;
Silke Wrede, Zeitlarn, DE;
MASCHINENFABRIK REINHAUSEN GMBH, Regensburg, DE;
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.