How is transformer oil changed?

To effectively execute a transformer oil change, begin by ensuring that safety protocols are in place, including the use of personal protective equipment. Disconnect power to the transformer and allow it to cool down. Next, set up an appropriate collection system for the old transformer oil, ensuring environmental regulations are met. Use a vacuum system or an oil pump to extract the oil from the transformer, carefully monitoring for any signs of moisture or contaminants. After the old oil has been removed, conduct a thorough inspection of the transformer for any leaks or damage. If necessary, clean the internal components with suitable methods to ensure optimal performance. Once cleaned, filter the new transformer oil to remove any impurities and then carefully fill the transformer with the new oil, maintaining the specified level. Finally, perform tests on the new oil for dielectric strength and other essential properties before restoring power to the transformer and monitoring its performance.