Thermostimulated depolarization (TSD) currents of silicone rubber housings and coatings

Author

Gubanski, Stanislaw Michal

Author_Institution

Dept. of Electr. Plant Eng., R. Inst. of Technol., Stockholm, Sweden

fYear

1991

fDate

8-12 Jul 1991

Firstpage

81

Abstract

The TSD fractional polarization current technique was applied to characterize changes in silicone rubber based materials that were exposed to an aging process in natural service conditions as HV outdoor composite insulation housings and coatings. An elevated temperature polarization process, which is characteristic for silicone rubbers, was analyzed and the distribution of thermokinetic parameters of its relaxation time τ, such as preexponential factor τ_oa and activation enthalpy ΔH, was found. The natural aging process leads to a drastic decrease of the τ_oa values, while the ΔH values increase slightly

Keywords

ageing; composite insulating materials; insulating coatings; insulation testing; rubber; silicones; thermally stimulated currents; HV outdoor composite insulation housings; TSD fractional polarization current technique; activation enthalpy; aging process; coatings; elevated temperature polarization process; natural service conditions; preexponential factor; relaxation time; silicone rubber; thermokinetic parameters; thermostimulated depolarization currents; Aging; Coatings; Conducting materials; Insulation; Polarization; Pollution measurement; Porcelain; Rubber; Strontium; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on

Conference_Location

Tokyo

Print_ISBN

0-87942-568-7

Type

conf

DOI

10.1109/ICPADM.1991.172131

Filename

172131