What is the role of 2-furfural in transformer oil for power transformers?

The role of 2-furfural in transformer oil for power transformers is as an indicator of paper insulation degradation. 2-furfural is a byproduct formed from the thermal breakdown of cellulose in the insulation materials. Its concentration in transformer oil can provide insights into the condition of the insulation system, helping to assess the overall health of the transformer and predict potential failures. Monitoring 2-furfural levels is crucial for maintenance and reliability.