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. 04, 1983
Filed:
Jan. 13, 1982
Applicant:
Inventor:
Roger E Ray, Coral Springs, FL (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ; H02H / ;
U.S. Cl.
CPC ...
361 64 ; 361 87 ; 361 78 ; 361 85 ; 361 62 ;
Abstract
A protective relay system for providing pilot protection for two and three terminal alternating current transmission lines, which system does not require a continuous metallic circuit between the relaying points. The evaluation circuit develops operating and restraining quantities, modified by a predetermined constant which determines the operating characteristic of the relay system.