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1. (WO2017150691) METHOD FOR EVALUATING INSULATION PROPERTIES OF INSULATOR

Pub. No.:    WO/2017/150691    International Application No.:    PCT/JP2017/008380
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Fri Mar 03 00:59:59 CET 2017
IPC: G01R 31/12
G01R 31/02
Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD.
住友電気工業株式会社
GOTOH EDUCATIONAL CORPORATION
学校法人五島育英会
NATIONAL INSTITUTE OF TECHNOLOGY
独立行政法人国立高等専門学校機構
Inventors: SEKIGUCHI, Yoitsu
関口 洋逸
TAKADA, Tatsuo
高田 達雄
TANAKA, Yasuhiro
田中 康寛
FUKUMA, Masumi
福間 眞澄
Title: METHOD FOR EVALUATING INSULATION PROPERTIES OF INSULATOR
Abstract:
A method for evaluating insulation properties, the method being provided with: a step α for applying a DC voltage to a first insulator under prescribed application conditions, and measuring an integral value of a current flowing through the first insulator from the start of application of the DC voltage until a prescribed time has elapsed after the end of application of the DC voltage; a step β for applying a DC voltage to a second insulator under the same application conditions as in step α, and measuring an integral value of a current flowing through the second insulator from the start of application of the DC voltage until a prescribed time has elapsed after the end of application of the DC voltage; and a step γ for comparing a first graph showing the relationship between the elapsed time and the integral value obtained in step α and a second graph showing the relationship between the elapsed time and the integral value obtained in step β, and thereby evaluating the difference between the insulation properties of the first insulator and the insulation properties of the second insulator that accompany the application of the DC voltage.