Electrical Properties of Waste Mineral Oil Recycled Under Various Treatments and Doping with Nanoparticles for Transformer Application

The transformer is used as a device to step-up or step-down electrical power and operate continuously for a long period. Mineral oil is the medium most used as a transformer insulation since it has been functioned as cooling agent for its properties but has been substituted over a period of time. In this research, some properties of wasted mineral oil recycled under different process and doping with various concentration of Carbon Nanotube (CNT); 0.001g/L, 0.005g/L, 0.01g/L, 0.015g/L, 0.02g/L, 0.025g/L, 0.03g/L and 0.035g/L) are studied accordingly. It is observed that, there is 96.90% enhancement in case of AC breakdown voltage at 0.005 g/L concentrations compared to wasted mineral oil without any addition of nanoparticles. Tan delta value, permittivity and resistivity of oil samples also reflect the value of breakdown voltage obtained in this study. It is figure out that, CNT nanofluid can reach the greatest breakdown efficiency as good insulating oil at 0.005g/L CNT concentration which promising advantage for future transformer applications.