Experimental Investigations on Dielectric Fluids Behavior in High‐Power Transformers

The dielectric breakdown voltage of MgMnNi/transformer oil‐based nanofluids was systematically investigated under the influences of an electric field. The experimental behavior appears to come to a maximal end value of the breakdown voltage at around 72 kV. The prepared dielectric fluid has been investigated for use as high‐voltage insulation. The dielectric strengths of these nanofluids increase possibly due to enhanced electric field dissipation due to the presence of magnetite nanoparticles in fluids. The zeta potential value was found to be −18.8 mV , which shows that the nanoparticles are highly stable even at a pH 10. The thermophysical properties were performed using KD 2 Pro method, and for viscosity measurements, DV ‐E viscometer was used.