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:
Dec. 19, 2006
Filed:
Jan. 10, 2006
Kaveh Niayesh, Teheran, IR;
Friedrich Koenig, Oberbözberg, CH;
Andreas Dahlquist, Zürich, CH;
ABB Research Ltd, Zurich, CH;
Abstract
A process and a device are disclosed for current limiting and/or circuit breaking and a switchgear assembly with such a device. As claimed in the invention a liquid metal is moved by a dielectric fluid drive with a control between a first current path for the rated current (I), a second current path for current limiting (I) and optionally a third current path for current interruption (i=0), the working fluid acting mechanically with a definable drive pressure (p, p) directly on one surface of the liquid metal. Embodiments are, among others, the following: insulating gas or insulating liquid as the drive fluid; pressure drive with pressure vessels and valves or a piezodrive for the working fluid; and design criteria for the liquid metal arrangement, drive pressure (p, p) and piezodrive. Advantages are, among others, the following: reversible current limiting and current interruption, also suited for high voltages and current, fast reaction times, low wear and maintenance-friendly.