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

The neutralization number of transformer oil in power transformers is a critical parameter that indicates the oil’s acidity level, typically measured in milligrams of KOH per gram of oil. A lower neutralization number signifies better oil quality, while higher values can indicate degradation due to oxidation or contamination. Generally, a neutralization number below 0.1 mg KOH/g is considered acceptable for maintaining the performance and longevity of power transformers.