TY - JOUR T1 - Comparative Study on the Performance of Ester Oil for Transformer Retrofilling AU - David Silalahi,Heri Hermansyah,Patrick Cognet JO - International Journal of Technology VL - 16 IS - 5 SP - 291 EP - 319 PY - 2025 DA - 2025/09/22 SN - 2087-2100 DO - https://doi.org/10.14716/ijtech.v16i5.7707 UR - https://ijtech.eng.ui.ac.id/article/view/7707