Transformer oil dehydration is the process of removing moisture from the oil used to insulate and cool electrical transformers. This is a critical maintenance procedure because the presence of water in the oil can severely degrade the transformer's performance and longevit. Transformer oil serves as both an insulating fluid and a coolant. Over time, this oil can become contaminated with impurities, including water, which can enter through leaks, condensation, or as a byproduct of the aging process of the solid insulation (cellulose paper). Moisture in the oil leads to several problems