What is the transformer oil treatment procedure for power transformers?

The transformer oil treatment procedure for power transformers involves several key steps. Initially, the oil is sampled and analyzed for contaminants and moisture content. Next, the oil undergoes filtration to remove particulate matter, followed by dehydration to eliminate moisture. In some cases, vacuum treatment is applied to enhance the oil’s dielectric strength. Finally, the treated oil is tested again to ensure it meets the required specifications before being reintroduced into the transformer.