Distribution of Relaxation Times in an Insulating Oil
- 1 December 1971
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electrical Insulation
- Vol. EI-6 (4) , 158-164
- https://doi.org/10.1109/tei.1971.299171
Abstract
The dielectric constant and loss of a cable insulating oil has been measured as a function of frequency and temperature. The distribution of relaxation times derived from the data is close to a log-normal (Gaussian in log τ) distribution and is found to be dependent on temperature. The activation energy for dielectric relaxation is non-Arrhenius, similar to the activation energy for viscosity. However, the temperature dependence of both activation energies is found to be significantly different.Keywords
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