What is silicone transformer oil and how is it used in transformers?

Silicone transformer oil is a synthetic insulating fluid composed mainly of polydimethylsiloxane polymers. It is used in transformers as both an electrical insulator and a heat transfer medium. Its high dielectric strength allows it to effectively insulate the transformer windings and other internal components, preventing electrical discharges and ensuring efficient operation. Additionally, silicone oil has excellent thermal stability and heat dissipation properties, which help manage the heat generated during transformer operation, thereby enhancing performance and extending the transformer’s lifespan.