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The thermal aging of insulating paper in composition of paper-impregnated insulation was investigated. The mechanical properties of the paper before and after aging, as well as other parameters were measured, in particular, the tangent of dielectric loss angle and the relative light transmission transformer oil. The sorption capacity of some pulp and dielectrics was evaluated. The significant dependence...
The thermal aging of the transformer oils mixtures were investigated. Tangent of dielectric loss angle, the spectral transmittance and fluorescence of samples of mixture of the insulating liquids were measured. The changes in optical and electrical characteristics as a function of the concentration of mixed oils were determined. The measurement results are compared with the theoretical dependencies.
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