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. 22, 1981
Filed:
May. 15, 1980
Kazuaki Oishi, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A gas-insulated switchgear apparatus is disclosed in which three-phase power transmission lines are anchored to associated entry gantries respectively while maintaining a required vertical open-air insulation distance between the power transmission lines, and line feeder switching units for electrically connecting the power transmission lines to gas-insulated main buses disposed substantially in parallel with the extending direction of the entry gantries are arranged to extend in a horizontal direction orthogonal with respect to the axial direction of the main buses. Bushings connected to the line-side ends of the respective line feeder switching units are spaced apart from each other by a predetermined open-air insulation distance in the horizontal direction, so that the desired vertical open-air insulation distance between the power transmission lines and the desired horizontal open-air insulation distance between the external terminals of the bushings can be maintained without increasing the axial length of the main buses.