What is fr3 oil for transformers?

FR3 oil for transformers is a natural ester-based dielectric fluid derived from vegetable oils. It is used in power transformers to provide electrical insulation and cooling. FR3 oil has a higher flash point and better biodegradability compared to mineral oils, making it a safer and more environmentally friendly option. Additionally, FR3 oil enhances the transformer’s operational efficiency and longevity by improving thermal management and reducing the risk of fire hazards.