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:
Jan. 08, 2019
Filed:
Sep. 20, 2013
Toshiba Mitsubishi-electric Industrial Systems Corporation, Chuo-ku, JP;
Toshihiro Tsuda, Tokyo, JP;
Tetsuo Yoshimitsu, Tokyo, JP;
Yuichi Tsuboi, Tokyo, JP;
Yoshihiro Ishikawa, Tokyo, JP;
Teruo Kanekawa, Tokyo, JP;
Abstract
A water-tree resistance evaluation material including: a material selection selecting a candidate insulation material; a test carrying out a water tree test on a test piece having electrode holes formed on a first surface; and a candidate insulation material evaluation evaluating characteristics of the candidate insulation material, including progress and speed of a water tree. The test includes: a system and condition setting for setting a test system; a voltage application for grounding a ground-side electrode that is immersed in the ground-side aqueous solution, while applying an AC voltage to an application-side electrode that is immersed in the application-side aqueous solution; a measurement step; and a period determination for determining whether a test period has exceeded a predetermined period.