Effect of Electrical Tree Deterioration on Field Distribution and Insulation State Evaluation of Epoxy Resin Bushing - Liu, Yanqing; Su, Zhan; Xu, Longjiang; Du, JinChao; Liu, Hongbo; Zhao, Xiaozhen (2024 IEEE 14th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), Properties and Applications of Dielectric Materials (ICPADM), 2024 IEEE 14th International Conference on the, 2024)