Why is transformer fluid purification critical for optimal transformer operation?

Transformer fluid purification is essential because it removes contaminants that adversely affect the oil’s insulating and cooling properties. Contaminants such as moisture, particulate matter, acids, and dissolved gases can lead to:

Insulation Failure: Reduced dielectric strength increases the likelihood of electrical breakdowns.

Overheating: Impurities hinder heat transfer, causing temperature rise and thermal stress.

Accelerated Aging: Contaminants catalyze chemical reactions that degrade both the oil and insulation materials.

Corrosion: Acids and moisture corrode metal components, weakening the transformer’s structural integrity.

By purifying the transformer fluid, these risks are mitigated, ensuring optimal operation, enhancing reliability, and prolonging the service life of the transformer.