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All Journal TELEKONTRAN: Jurnal Ilmiah Telekomunikasi, Kendali dan Elektronika Terapan Journal Of Sustainability Perspectives Electron: Jurnal Ilmiah Teknik Elektro INJECTION: Indonesian Journal of Vocational Mechanical Engineering Journal of Sustainability Perspectives SWADIMAS: JURNAL PENGABDIAN KEPADA MASYARAKAT Emitor: Jurnal Teknik Elektro
Muhtar, Ali
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Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Public Health Other

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Journal : Emitor: Jurnal Teknik Elektro

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DGA–Duval Triangle Analysis for Early Thermal Fault Diagnosis of Transformer Oil Muhtar, Ali; Azizah Umar, Ismi
Emitor: Jurnal Teknik Elektro Vol 25, No 3: November 2025
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v25i3.13359

Abstract

This study assesses the health of the T5 transformer oil at the Geothermal Power Plant to enable early thermal-fault diagnosis and support evidence-based maintenance. Methods comprised Dissolved Gas Analysis (DGA) with TDCG evaluation per IEEE C57.104-2019, Duval Triangle mapping, and breakdown-voltage (BV) and water-content testing per IEEE C57.106-2015. Results show TDCG of 686 ppm (Condition 1) with CO₂ at 10,000 ppm; gas fractions CH₄ 70.18%, C₂H₄ 29.24%, and C₂H₂ 0.58% place the point in zone T2 (300–700 °C). Water content is 29 ppm—above the recommended limit for transformers <72.5 kV (good: <10 ppm)—while mean BV is 73.4 kV, exceeding the 40 kV minimum. The evidence indicates a medium-level thermal fault with high moisture contamination. Oil filtering/dehydration and periodic DGA trend monitoring are recommended to mitigate failure risk and inform data-driven maintenance planning
Co-Authors Arifanto, Bima Arum Kurnia Sulistyawati Azizah Umar, Ismi Baqaruzi, Syamsyarief Dean Corio Deny Juanda Puradimaja Jeffry Andhika Putra Nia Saputri Utami Pabowo, I Putu Deny Arthawan Sugih Prasetyawan, Purwono pratama, andree fajar Ramadhani, Surya Tri Atmaja Sanjaya, Sukma Septiyanda, Yunita Shodiq, Amir Suhaimi, Khansa Salsabila Wulan Tika, Shovyana Yusuf Kurniawan