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:
Jan. 27, 1976
Filed:
May. 17, 1974
Adolf Eidinger, Nussbaumen, CH;
BBC Brown Boveri & Company Limited, Baden, CH;
Abstract
A switching arrangement located in the vicinity of and connected to an alternating current generator for disconnecting the generator under load and particularly under short-circuit current conditions includes a first switch connected to the generator and whose contacts are designed for carrying normal load current therefrom in a continuous manner. A second switch of the synchronized type whose contacts operate at high speed and are made comparatively less massive than those of the first switch is connected in parallel with the latter and is arranged to open its contacts subsequent to an opening operation of the contacts of the first switch. An ohmic resistor is connected in the current flow path through the second switch and its resistance is at most a 0.2 fold and preferably a 0.1 fold value of the sub-transient short-circuit impedance of the generator in order to facilitate the final switching out at the contacts of the second switch.