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. 02, 1997
Filed:
Jan. 11, 1996
Francis James Mumford, Weston, GB;
GEC Alsthom Limited, , GB;
Abstract
An inductive Superconductive Fault-Current Limiter (SCFCL) includes an iron core having a wound primary winding and a short-circuited superconductive secondary. The secondary remains superconductive up to a fault-current level in the primary, after which the superconductive secondary becomes resistive, the primary ampere-turns are not balanced, and the device becomes highly inductive, so limiting the fault-current. The fault-current threshold is increased without exceeding available critical superconductive current density levels and with a moderate superconductive coating thickness by using a stack of superconductive coated washers having a large radial extent compared to the coating thickness.