What is the process of degassing transformer oil in power transformers?

The process of degassing transformer oil in power transformers involves removing dissolved gases, primarily hydrogen and moisture, to enhance insulation properties and prevent electrical failures. This is typically achieved through vacuum treatment or by using a degassing unit that heats the oil and reduces pressure, allowing gases to escape. Effective degassing improves the dielectric strength of the transformer oil, ensuring optimal performance and longevity of the power transformer.