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:
Nov. 22, 1994
Filed:
Mar. 17, 1993
Kyuji Yaginuma, Katsuta, JP;
Takehiro Kikuchi, Hitachi, JP;
Hiroshi Suzuyama, Hitachioota, JP;
Shigeru Fujiya, Hitachioota, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An instrument current transformer for a main power cable which is composed of three power cables for three phases disposed in a power cable laying hole and three current transformer coils for the three phases, each of the three current transformer coils surrounding a corresponding one of the three power cables, the instrument current transformer including: a plurality of upper circumferential installation unit members disposed near an end portion of the power cable laying hole along circumference sides of an opening portion of the power cable laying hole, each of the upper circumferential installation members being provided with at least one securing portion extending in a radial direction and the upper circumferential installation unit members being secured to the end portion of the power cable laying hole via respective at least one securing portions; three axial installation members for the three phases, each extending along corresponding ones of the three power cables, first ends of the axial installation members being connected to the upper circumferential installation unit members and the three current transformer coils for the three phases being supported by corresponding ones of the three axial installation members; and a plurality of lower circumferential installation unit members having substantially a same configuration as corresponding ones of the upper circumferential installation unit members, the lower circumferential installation unit members being connected to second ends of the axial installation members opposite from the first ends.