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. 28, 2009
Filed:
Feb. 23, 2007
Olaf Hunger, Schaffhausen, CH;
Max Claessens, Gebenstorf, CH;
Martin Holstein, Baden-Rütihof, CH;
Johan Abrahamsson, Wettingen, CH;
Martin Kriegel, Unterehrendingen, CH;
Olaf Hunger, Schaffhausen, CH;
Max Claessens, Gebenstorf, CH;
Martin Holstein, Baden-Rütihof, CH;
Johan Abrahamsson, Wettingen, CH;
Martin Kriegel, Unterehrendingen, CH;
ABB Technology AG, Zurich, CH;
Abstract
The switching chamber for a heavy-duty circuit breaker has a first arcing contact piece, a second arcing contact piece, a heating chamber, and an insulating nozzle. The first or second arcing contact piece can be moved by means of a drive. The heating chamber is used for temporarily storing quenching gas heated by an arc that may burn between the contact pieces. An insulating nozzle has a throat that is connected to the heating chamber, and which is used for guiding a quenching gas flow. During an opening operation, the two arcing contact pieces reach a maximum relative speed that is at least 1.3 times as great as a relative speed of the two arcing contact pieces. The relative speed being required for capacitive switching.