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:
Mar. 28, 2017
Filed:
Nov. 10, 2011
Wolfgang Albrecht, Wenzenbach, DE;
Christian Hammer, Regensburg, DE;
Werner Hartmann, Weisendorf, DE;
Silvio Kosse, Erlangen, DE;
Andreas Lawall, Berlin, DE;
Roman Renz, Berlin, DE;
Astrid Renz, Berlin, DE;
Andreas Stelzer, Berlin, DE;
Joerg Teichmann, Alzenau, DE;
Norbert Wenzel, Erlangen, DE;
Wolfgang Albrecht, Wenzenbach, DE;
Christian Hammer, Regensburg, DE;
Werner Hartmann, Weisendorf, DE;
Silvio Kosse, Erlangen, DE;
Andreas Lawall, Berlin, DE;
Roman Renz, Berlin, DE;
Andreas Stelzer, Berlin, DE;
Joerg Teichmann, Alzenau, DE;
Norbert Wenzel, Erlangen, DE;
SIEMENS AKTIENGESELLSCHAFT, Munich, DE;
Abstract
A tap changer for uninterrupted switching between winding taps of a tapped transformer has first and second load branches for each phase to be switched. Each load branch has a main vacuum switch and in parallel thereto a series connection of a switch-over resistance and a respective auxiliary vacuum switch. First and second vacuum switching tubes each contain the main vacuum switch of the respective first and second load branches and the auxiliary vacuum switch of the other of the load branches.