What is the purpose of vacuum processing transformer oil in power transformers?

The purpose of vacuum processing transformer oil in power transformers is to remove moisture, gases, and particulate contaminants from the oil. This process enhances the dielectric strength and thermal stability of the transformer oil, ensuring optimal performance and longevity of the power transformer. By creating a vacuum, dissolved gases are extracted, and moisture is evaporated, resulting in cleaner oil that improves the overall reliability of the transformer system.