What is the transformer oil dehydration process?

The transformer oil dehydration process involves removing moisture from the insulating oil to enhance its dielectric strength and prevent insulation failure. This is typically achieved through methods such as vacuum dehydration, where oil is subjected to a vacuum to lower its boiling point, allowing water to evaporate. Additionally, the use of adsorbent materials like silica gel can further absorb moisture. Regular dehydration is essential for maintaining transformer performance and longevity.