What is the total acid number of transformer oil in power transformers?

The total acid number of transformer oil in power transformers is a critical parameter that indicates the oil’s acidity level, which can affect its performance and longevity. Typically, the total acid number should be kept below 0.1 mg KOH/g to ensure optimal insulation properties and prevent corrosion of transformer components. Regular monitoring of the total acid number helps in assessing the condition of the transformer oil and determining the need for replacement.