What are the testing procedures for transformer oil as per IS 1866?

The testing procedures for transformer oil as per IS 1866 include a series of standardized tests to evaluate the oil’s physical and chemical properties. Key tests involve measuring the breakdown voltage, acidity, water content, and flash point. Additionally, the presence of dissolved gases is analyzed to assess the oil’s condition. These tests ensure the transformer oil meets the required specifications for effective insulation and cooling in power transformers.