What is the neutralization value of transformer oil in power transformers?

The neutralization value of transformer oil in power transformers is a critical parameter that indicates the oil’s acidity level. It is measured in milligrams of potassium hydroxide (KOH) per gram of oil. A low neutralization value signifies good oil quality, while a high value indicates the presence of acidic compounds, often due to oxidation or contamination, which can adversely affect the performance and lifespan of the transformer.