What does degree of polymerization indicate in transformer insulation?

The degree of polymerization (DP) in transformer insulation indicates the average chain length of polymer molecules, which directly correlates with the insulation’s mechanical strength and electrical properties. A higher DP signifies better insulation quality, enhancing the material’s resistance to thermal and electrical stress. Monitoring DP is crucial for assessing the aging and degradation of insulation materials, ensuring the reliability and longevity of power transformers.