What is the maintenance frequency for oil filled transformers?

The maintenance frequency for oil filled transformers typically depends on the manufacturer’s recommendations and the operating conditions. Generally, it is advisable to conduct maintenance inspections every 1 to 3 years. This includes testing the transformer oil for dielectric strength, moisture content, and dissolved gases, as well as checking for leaks and ensuring proper cooling. Regular maintenance helps ensure the reliability and longevity of oil filled transformers.