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:
Apr. 05, 1988
Filed:
Aug. 14, 1987
Applicant:
Inventors:
Assignee:
La Telemecanique Electrique, , FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 45 ; 361 46 ;
Abstract
The invention provides a safety device for an electric installation protection apparatus, comprising a residual differential current detector through which pass a phase conductor and a neutral conductor, and a processing circuit supplied by a rectifier bridge and connected to the phase and neutral conductors. It further comprises biasing and safety circuits formed by a static bidirectional switch connected between a ground connection and the AC terminals of the rectifier bridge.