Title :
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
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;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids, 1996, ICDL '96., 12th International Conference on
Conference_Location :
Roma
Print_ISBN :
0-7803-3560-0
DOI :
10.1109/ICDL.1996.565502
