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. 15, 1987
Filed:
Feb. 10, 1986
Applicant:
Inventor:
Pierre Demeyer, Uriage, FR;
Assignee:
Merlin Gerin, , FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 96 ; 361 50 ; 361 42 ; 307 38 ; 307 39 ; 364483 ;
Abstract
Digital solid-state trip unit designed to provide protection against phase faults, notably overloads and short-circuits and optional functions, in this case ground fault protection and load shedding and restoring functions. Two parameter input switches (72, 74) are assigned to the optional functions to display, in the ground protection option the ground protection pick-up and the ground protection time delay, and in the load shedding option, the load restoring pick-up and the load shedding pick-up. Each option has a software program stored in a non-volatile memory corresponding to it.