What is dielectric aging index dry transformer?

The dielectric aging index (DAI) of a dry transformer is a measure used to assess the insulation system's condition over time, particularly the ability of the dielectric materials to withstand electrical stress. It reflects the degradation of insulation due to factors like temperature, humidity, and electrical stress, indicating the transformer's remaining lifespan and reliability. A higher DAI suggests better insulation integrity, while a lower index may signal potential failure risks, necessitating maintenance or replacement. Regular monitoring of the DAI helps ensure the safe and efficient operation of dry Transformers.