During transformer operation, oil undergoes oxidation due to air and high temperatures. This leads to color darkening, increased viscosity, and decreased insulation performance, a process known as “aging.” To restore oil quality:
Aging Effects
Transformer oil changes color, becomes turbid, and increases in viscosity, flash point, acid value, and ash content, impairing insulation.
Regeneration
Chemical methods separate degradation products in aged oil. Antioxidants like picromide (0.02% to 0.03% of total oil) enhance stability.
Purification
Physical methods remove moisture and contaminants from dirty oil using pressure or vacuum oil filters.
Effective management of transformer oil ensures prolonged equipment lifespan and reliable performance in electrical applications.
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