Breakdown characteristics of paper-ice composite insulating system in liquid nitrogen

Author

Nagao, Masayuki ; Higami, Takeshi ; Yanase, Jun´ichi ; Kosaki, Masamitsu ; Shibata, Toshikazu ; Isojima, Shigeki

Author_Institution

Toyohashi Univ. of Technol., Japan

fYear

1995

fDate

22-25 Oct 1995

Firstpage

568

Lastpage

571

Abstract

In this paper, we have studied the AC breakdown performance of a paper-ice composite insulating system immersed in liquid nitrogen. This system could be a good candidate for cryogenic electrical insulation systems, since we can expect an improvement of breakdown strength by replacing liquid nitrogen with ice, whose breakdown strength could be higher than that of liquid nitrogen. The breakdown voltage in this paper-ice composite system was higher than that of a paper-liquid nitrogen system. Furthermore we found the existence of self-healing breakdown. These results were scarcely dependent on the kinds of insulating paper and size of electrodes. The paper-ice composite insulation system is thought to be a good candidate for electrical insulating systems at cryogenic temperature

Keywords

composite insulating materials; cryogenics; electric breakdown; ice; paper; AC breakdown; cryogenic electrical insulation; liquid nitrogen; paper-ice composite insulating system; self-healing breakdown; Breakdown voltage; Cryogenics; Dielectric liquids; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Ice; Interconnected systems; Nitrogen; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1995. Annual Report., Conference on

Conference_Location

Virginia Beach, VA

Print_ISBN

0-7803-2931-7

Type

conf

DOI

10.1109/CEIDP.1995.483789

Filename

483789