Comparison of Breakdown Voltage and Aging of Kraft Paper in Transformers Immersed in Mineral Oil, Natural Ester, and Synthetic Ester. ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK, [S. l.], v. 15, n. 2, p. 309–323, 2025. DOI: 10.51747/energy.v15i2.15215. Disponível em: https://e-journal.upm.ac.id/index.php/energy/article/view/energy.v15i2.15215. Acesso em: 4 feb. 2026.