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:
Sep. 28, 1982
Filed:
Nov. 25, 1980
Applicant:
Inventor:
Clyde Gilker, South Milwaukee, WI (US);
Assignee:
McGraw-Edison Company, Rolling Meadows, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 92 ; 361 93 ;
Abstract
A backup trip circuit is provided for an electronically controlled recloser or circuit breaker which requires a constant voltage direct current supply for its normal tripping circuit. Whenever the normal DC supply voltage drops below the minimum level, a capacitor is coupled to and charged by, the distribution line current. Then, whenever the line current exceeds a selected magnitude for a selected period of time, the capacitor is discharged through the trip coil of the breaker to open this distribution line.