Aparna N, Vasa NJ, Sarathi R. Understanding impulse surface flashover phenomenon on thermally aged oil impregnated pressboard material. pr [Internet]. 2017 Mar. 2 [cited 2024 May 2];:141-50. Available from: https://node6473.myfcloud.com/~geosocin/CPRI/index.php/pr/article/view/149