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. 07, 1992
Filed:
Jul. 17, 1990
Toshiyuki Kawaguchi, Inuyama City, Aichi Pref., JP;
Hiroyuki Katsukawa, Niwa-Gun, Aichi Pref., JP;
Naoki Tanaka, Kuwana City, Mie Pref., JP;
Seigo Yokoi, Nakagawa-Ku, Nagoya City, Aichi Pref., JP;
Yuichi Kakizaki, Mizuho-Ku, Nagoya City, Aichi Pref., JP;
Other;
Abstract
An optical current transformer particularly useful for a fault location system for a power supply system and substation, including a casing which can be detachably secured to a plurality of wire conductors which conduct currents of the same phase. Within the casing a plurality of Rogowsky coils are arranged such that when the casing is secured to the wire conductors, each Rogowsky coil is wound around respective wire conductors. The Rogowsky coils are connected in series with an air-core coil and an optical current sensor having a Faraday element is arranged within a space of the coil such that the Faraday element is subjected to a magnetic flux generated by the coil. A magnitude of the magnetic flux is optically detected by the Faraday element to measure a total sum of currents conducting along the wire conductors.