Nanoparticle-enhanced ester-mineral oil blends: Electrical insulation boost with calcium copper titanate (CCTO) and boron nitrate (BN)

Mineral oil is the most common type of transformer oil, but it has a low fire point and does not break down in the environment, so it is not ideal. Biodegradable, non-toxic, and fireproof ester-based oils are considered second-generation insulators. These oils are continuously under investigation as potential alternatives to mineral oil, the current standard for insulation. These ester-based oils have their dielectric properties amplified by the addition of various nanomaterials. The primary goal of this research is to create a base fluid by mixing mineral and natural oils, then to disperse nanoparticles of Calcium Copper Titanate (CCTO) and Boron Nitrate (BN). Combining the two nanomaterials improves the dielectric properties of nanofluids, according to the results. The AC breakdown voltage of the oil blend is 41 % lower than that of the CCTO dispersed nanofluid, according to reports. Similarly, the AC breakdown voltage of the nanofluid containing BN is up to 35 % greater than that of the oil mixture. Additionally, oil blends dispersed with CCTO have superior dielectric and coolant properties.