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:
Jul. 12, 2011
Filed:
Jul. 31, 2009
Stefan Halen, Västerås, SE;
Ola Jeppsson, Västerås, SE;
Edgar Dullni, Ratingen, DE;
Hans Begge, Wuppertal, DE;
Stefan Halen, Västerås, SE;
Ola Jeppsson, Västerås, SE;
Edgar Dullni, Ratingen, DE;
Hans Begge, Wuppertal, DE;
ABB Research Ltd., , CH;
Abstract
A device for switching in and out a load with respect to an alternating voltage feeder has two mechanical switches connected in series in a current path between the load and the feeder and each having a by-pass branch with at least one member with ability to block current therethrough in at least a blocking direction and conduct current therethrough in at least one direction. A unit is adapted to control a procedure of a switching out and switching in by synchronization with the current in the feeder and the voltage of the feeder, respectively.