How is moisture in transformer oil detected and removed?

Moisture in transformer oil is detected using techniques such as Karl Fischer titration, which quantifies water content, and capacitance-based sensors that monitor changes in dielectric properties. To remove moisture, methods like vacuum dehydration and oil filtration are employed. Vacuum dehydration involves heating the oil under vacuum to evaporate water, while filtration systems utilize absorbent materials to capture moisture, ensuring the oil maintains its insulating properties and prolongs transformer life.