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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 KIC Emitor: Jurnal Teknik Elektro
Muhtar, Ali
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Public Health Social Sciences Other

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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
The Role of MSME Business Development Training on Increasing Business Performance of BMT Beringharjo Ponorogo Partners Harahap, Soritua Ahmad Ramdani; Firmansah, Yayan; Maulana, Hartomi; Kurniawan, Dhika Amalia; Astuti, Rahma Yudi; Rusli, Lathiefa; Abidin, M. Zaenal; Muhtar, Ali
Proceeding Kilisuci International Conference on Economic & Business Vol. 2 (2024): Proceeding Kilisuci International Conference on Economic and Business
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/5cg86650

Abstract

Research aim : This research aims to determine the role of MSME business development training on improving the business performance of BMT Beringharjo Ponorogo partners. Design/Methode/Approach : In this research and service, we use direct observation methods in the field and use training and mentoring methods for BMT Beringharjo Ponorogo partners. Research Finding : The result of carrying out this research and service is that the MSME partners of BMT Beringharjo are able to understand and implement the concepts of financial recording, marketing methods through normal means and digital marketing, warehousing operations and HR management within the scope of their respective MSMEs
Co-Authors Arifanto, Bima Arum Kurnia Sulistyawati Azizah Umar, Ismi Baqaruzi, Syamsyarief Dean Corio Deny Juanda Puradimaja Dhika Amalia Kurniawan Harahap, Soritua Ahmad Ramdani Hartomi Maulana Jeffry Andhika Putra Lathiefa Rusli M. Zaenal Abidin Nia Saputri Utami Pabowo, I Putu Deny Arthawan Sugih Prasetyawan, Purwono pratama, andree fajar Rahma Yudi Astuti, Rahma Yudi Ramadhani, Surya Tri Atmaja Sanjaya, Sukma Septiyanda, Yunita Shodiq, Amir Suhaimi, Khansa Salsabila Wulan Tika, Shovyana Yayan Firmansah Yusuf Kurniawan