Thermal aging effects on electrical and physicochemical properties of mineral base insulating liquids

Author

Abe, K. ; Umemura, T. ; Shimahara, M.

Author_Institution

Toshiba Corp., Mie, Japan

fYear

1988

fDate

5-8 Jun 1988

Firstpage

203

Lastpage

206

Abstract

The variation of electric and physicochemical properties of a mineral base insulating liquid due to thermal aging has been studied. The liquid consisted of various kinds of C₁₆ to C₂₀ hydrocarbons. The C₁₈ constituents seem to selectively decompose during aging. Thermal aging was found to give a shift of the molecular-weight-distribution curve, resulting in an increased average molecular weight. A conductivity increase due to the increase in ionic concentration in the liquid was observed. The decrease of carrier mobility is attributed to an increase of carrier size

Keywords

ageing; dissociation; electrical conductivity of liquids; insulating oils; ion mobility; molecular weight; organic compounds; carrier mobility; conductivity increase; decomposition; electrical properties; hydrocarbons; ionic concentration; mineral base insulating liquids; molecular-weight-distribution curve; oils; physicochemical properties; thermal aging; Aging; Chemicals; Dielectric liquids; Dielectric loss measurement; Dielectrics and electrical insulation; Minerals; Oil insulation; Petroleum; Thermal conductivity; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1988., Conference Record of the 1988 IEEE International Symposium on

Conference_Location

Cambridge, MA

ISSN

1089-084X

Type

conf

DOI

10.1109/ELINSL.1988.13905

Filename

13905