Dielectric Properties and Fire Safety of Mineral Oil and Low-Viscosity Natural Ester Mixtures in Various Concentrations

This paper presents the results of testing electrical and fire properties mineral oil low-viscosity natural ester mixtures. Properties such as breakdown voltage, relative permeability, dispersion coefficient, conductivity, flash burn point, lower heating values were investigated in different concentrations mixtures two liquids, well for base liquids. To ensure equal humidity levels, prepared samples liquids conditioned under identical climatic conditions, resulting with similar (9 ± 3)%. The obtained measurement fluids related to analyzed terms changes safety when used insulating transformers. presented are useful supplementing knowledge on possibilities using dielectric liquid high-voltage power devices, aim alternatives oil.