Mutual contribution of area and volume effects on breakdown strength in liquid nitrogen

Author

Hayakawa, N. ; Sakakibara, H. ; Goshima, H. ; Hikita, M. ; Okubo, H.

Author_Institution

Nagoya Univ., Japan

fYear

1996

fDate

15-19 Jul 1996

Firstpage

333

Lastpage

336

Abstract

We investigated breakdown characteristics of pressurized liquid nitrogen (LN₂) over a very wide range of electrode size. Experimental results revealed that the breakdown mechanism changed from an area effect to a volume effect when increasing the highly stressed liquid volume in LN₂. Moreover, we discussed the contribution of area and volume effects to the breakdown strength in LN₂. It was suggested that a mutual contribution of area and volume effects appeared in breakdown characteristics in LN₂ under thermal bubble conditions as a phenomenon peculiar to cryogenic liquids

Keywords

electric breakdown; electric strength; insulating materials; insulation testing; nitrogen; N₂; area effect; breakdown characteristics; breakdown mechanism; breakdown strength; cryogenic liquids; electrode size; highly stressed liquid volume; insulation data; mutual contribution; pressurized liquid N₂; superconducting power apparatus; thermal bubble conditions; volume effect; Cryogenics; Dielectric liquids; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Nitrogen; Ocean temperature; Power transformer insulation; Rough surfaces; Sea surface;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Dielectric Liquids, 1996, ICDL '96., 12th International Conference on

Conference_Location

Roma

Print_ISBN

0-7803-3560-0

Type

conf

DOI

10.1109/ICDL.1996.565502

Filename

565502