What is a transformer oil filtering, degassing, and drying unit?

A transformer oil filtering, degassing, and drying unit is a comprehensive system used to purify transformer oil by removing contaminants like water, dissolved gases, and solid particles. It typically includes filtration, vacuum degassing, and heating systems to ensure the oil’s dielectric strength and insulating properties are restored. The unit also dries the oil, preventing moisture from compromising its insulating performance.