What are the best practices for oil transformer maintenance as outlined in the PDF?

The best practices for oil transformer maintenance as outlined in the PDF include regular sampling and testing of transformer oil to monitor its dielectric strength, moisture content, and dissolved gases. Additionally, maintaining proper oil levels, ensuring effective cooling systems, and conducting visual inspections for leaks or discoloration are crucial. Implementing a routine maintenance schedule and adhering to manufacturer guidelines also enhance the reliability and longevity of oil transformers.