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:
Aug. 24, 1993
Filed:
Apr. 01, 1991
Karl Echtler, Puchheim, DE;
Hilti Aktiengesellschaft, Furstentum Liechtenstein, LI;
Abstract
A fault current protective device contains a fault current protective switch (2) for the protection of at least two circuits formed by branching subsequent to the fault current protective switch (2) and having the same number of phases. One of these circuits is looped through the fault current protective switch (2) again at least once over connections (L2, L3, and L2', L3'), respectively, of the fault current protective switch (2) which are free of use, so that a higher protection level (lower nominal fault current I.sub..DELTA.n) is obtained relative to the other circuit. Only one fault current protective switch (2) is required for this purpose, so that the fault circuit protective device is compact and economical.