Hidayat, Arief Rahman, Agus Jamal, Anna Nur Nazilah Chamim, Ramadoni Syahputra, and Jeckson Jeckson. “Analysis of Power Transformer Insulation: A Case Study in 150 KV Bantul Substation”. Journal of Electrical Technology UMY 3, no. 2 (June 8, 2019): 50–60. Accessed September 3, 2025. https://journal.umy.ac.id/index.php/jet/article/view/8246.