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:
Oct. 08, 1985
Filed:
Sep. 13, 1982
Chang E Kang, DeKalb, IL (US);
L Alan Lowry, Glen Ellyn, IL (US);
Merlin E Burkum, Elmhurst, IL (US);
Commonwealth Edison Company, Chicago, IL (US);
Abstract
An apparatus for locating ground faults on direct current control systems includes a low frequency current generator having a variable output, a Hall-effect current probe for detecting the low frequency current produced by the generator, a filter and amplifier connected to the output of the Hall-effect current probe for identifying and amplifying the low frequency signal and a read-out element connected to the output of the amplifier to indicate the relative magnitude of the low frequency signal. A method for locating ground faults on direct current control system while the system is energized is described.