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. 22, 1981
Filed:
Feb. 08, 1980
Applicant:
Inventor:
Fritz Breimesser, Erlangen, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 44 ; 3241 / ; 361 93 ;
Abstract
A method and apparatus for monitoring conductor currents for a fault current which changes the magnetic bias of a magnetic circuit in which the magnetization of the magnetic core is alternatingly reversed by sequences of magnetizing pulses and a determination made of the number of pulses up to which the pulse amplitude exceeds predetermined voltage reference value, with the change of this number of pulses used to derive an output signal.