What is the transformer oil purification process?

The transformer oil purification process involves removing impurities such as water, gases, and particulate matter from the transformer oil. This is typically achieved through methods like vacuum dehydration, where moisture is evaporated under low pressure, and filtration, which captures solid contaminants. Additionally, degassing techniques can eliminate dissolved gases. The purification process is essential for maintaining the electrical insulating properties and overall performance of the transformer oil in power transformers.