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:
Nov. 01, 2005
Filed:
Nov. 20, 2000
Falah Al-hosini, Västerås, SE;
Jan Smede, Västerås, SE;
Jan-anders Nygren Nolemo, Västerås, SE;
Magnus Backman, Västerås, SE;
Philip Kjaer, Västerås, SE;
Lennart Balgård, Arboga, SE;
Per Larsson, Västerås, SE;
Ove Albertsson, Västerås, SE;
Lars Jonsson, Västerås, SE;
Jan Johansson, Arboga, SE;
Falah Al-Hosini, Västerås, SE;
Jan Smede, Västerås, SE;
Jan-Anders Nygren Nolemo, Västerås, SE;
Magnus Backman, Västerås, SE;
Philip Kjaer, Västerås, SE;
Lennart Balgård, Arboga, SE;
Per Larsson, Västerås, SE;
Ove Albertsson, Västerås, SE;
Lars Jonsson, Västerås, SE;
Jan Johansson, Arboga, SE;
ABB Technology AG, Zurich, CH;
Abstract
An electric switching device for alternating current comprises two branches () connected in parallel in a current path and having each at least two contact members () connected in series. A semiconductor device () is adapted to interconnect the midpoints between the two contact members of each branch. When opening the current path a first contact member () of one, first branch located before said midpoint as seen in the current direction existing is controlled to open and a second contact member () of the second branch located after the midpoint as seen in the current direction is controlled to open for transferring the current to a temporary current path through the semiconductor device. The current path through the switching device is then broken when the semiconductor device is in a blocking state by opening a contact member () of the switching device arranged in the temporary current path.