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Influence of thermal ageing on dielectric response of oil-paper insulation

Gielniak J., Graczkowski A., Gubanski S., Moranda H., Mościcka-Grzesiak H., Walczak K.

Materials Science Poland

2009

Vol. 27, No. 4/2

1199--1205

Results of dielectric response measurements in frequency domain at various temperatures have been presented for oil impregnated paper samples unaged and thermally aged containing various amounts of moisture. The obtained results were used for defining respective master curves and activation energies. Discrepancies of the results for similar samples are also discussed. Finally, statistical spread of the data was presented and the influence of moisture content on the dielectric response of paper samples has been discussed.