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:
Jun. 26, 1990
Filed:
Dec. 05, 1988
Applicant:
Inventors:
Pierre Schueller, Grenoble, FR;
Gilbert Garnier, Fontaine, FR;
Assignee:
Merlin Gerin, , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K / ;
U.S. Cl.
CPC ...
361396 ; 361393 ;
Abstract
A ground fault trip unit of the three-pole type, comprises a fourth conductor passing through the differential transformer. The fourth conductor is connected to terminals located on a different face from that of the terminals of the other three conductors. The same ground fault trip unit can be associated with a three-pole breaking device, in which case the fourth conductor is not used, and with a four-pole device whose fourth pole is connected to the fourth conductor of the ground fault trip unit.