What is the transformer oil filtration process as detailed in the PDF?

The transformer oil filtration process involves several key steps to ensure the removal of impurities and moisture from the transformer oil. Initially, the oil is heated to reduce viscosity, followed by a vacuum treatment to extract dissolved gases. Filtration systems utilize various media to capture particulate matter. Finally, the treated transformer oil is tested for dielectric strength and moisture content to ensure it meets the required specifications for optimal performance in power transformers.