Résumé
This paper presents a study concerning the dependence of power cables polyethylene's conductivity on temperature and electric field. In the first part the experimental results obtained on flat samples of XLPE are presented and analyzed, for an electric field between 5 and 20 kV/mm and temperatures between 30 and 70 degrees C. Next, the values of the conductivity are calculated using known empirical equations, and the results are compared with the experimental ones. Finally, a new equation is proposed for calculating the polyethylene's conductivity with closer results to those obtained experimentally.