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:
Mar. 08, 1988
Filed:
Feb. 24, 1986
Shuzo Tanigaki, Tokyo, JP;
Masashi Tokushige, Kunitachi, JP;
Kabushiki Kaisha Meidensha, Tokyo, JP;
Abstract
A gas insulated metal-clad electrical power equipment has a cylindrical insulating bushing for supporting an electrical conductor. The bushing is filled with the insulating gas therein and air-tightly fixed to a grounded metal compartment wall member of the equipment in such a way that the outer surface of the conductor directly faces the inner circumferential surface of a through hole formed in the wall member with a distance g therebetween. When the axial length l of the inner cylindrical space of the bushing is determined as l.gtoreq.g/4 and further the difference in diameter between the wall through hole .phi..sub.1 and the inner cylindrical space .phi..sub.2 of the bushing is determined as .phi..sub.2 -.phi..sub.1 .gtoreq.4 mm, it is possible to effectively prevent dielectric breakdown along the surface of the bushing. Owing to the above arrangement, it is possible to effectively reduce the size, space, weight, cost, etc. of the bushing, as compared with conventional ones.