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All Journal Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) JEECAE (Journal of Electrical, Electronics, Control, and Automotive Engineering) J-ADIMAS (Jurnal Pengabdian kepada Masyarakat) JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Jurnal Fortech Jurnal Pengabdian Mitra Masyarakat (JPMM) Electron: Jurnal Ilmiah Teknik Elektro Jurnal FORTECH Jurnal Pengabdian Masyarakat Indonesia Nucleus Journal
Basuki Winarno
Politeknik Negeri Madiun
Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Setting Relay Diferensial Siemens 7UT5121 pada Transformator dengan ETAP untuk Meningkatkan Sistem Proteksi Dimas Nur Prakoso; Yuli Prasetyo; Budi Triyono; Basuki Winarno
Jurnal FORTECH Vol. 7 No. 1 (2026): In Progress
Publisher : FORTEI (Forum Pendidikan Tinggi Teknik Elektro Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56795/fortech.v7i1.7102

Abstract

The development of the electric power system is quite rapid in Indonesia, where the development of the electric power system will not experience a decline and will continue to increase. To distribute electrical energy to consumers, transformers are the main component in the electrical system. During its operation, transformers often experience faults, making reliable protection and security systems necessary to maintain the smooth operation of the system. Protection systems are designed to interrupt faulty currents and protect equipment from damage caused by these currents. One of the primary protection devices for transformers is the differential relay, which operates quickly without requiring coordination with other relays. Differential relays work based on the vector difference between two or more electrical quantities exceeding a predetermined threshold. In this study, a Siemens 7UT5121 protection relay was used. To facilitate testing and fault analysis in the settings of this protection relay, simulations were conducted using ETAP software. The protection relay settings were configured to safeguard the transformer if there was a current difference between the CT on the primary and secondary sides within the protection zone. Based on calculations, the CT ratio for nominal current (I₁) was found to be 230.94 A, and the nominal current (I₂) was 1905.25 A. The CT secondary currents were calculated as 0.769 A for I₁ and 0.866 A for I₂. In the differential relay, the differential current was recorded at 0.097 A, while the restrain current was 0.817 A. The slope percentage analysis yielded values of 11.18% for slope 1 and 23.74% for slope 2. The differential current setting value obtained was 0.379 A. The relay will not operate if a fault occurs outside the protection zone, ensuring the reliability of the transformer protection system
Co-Authors Aditya PP Albert Sudaryanto Asih Setiarini Budi Artono Budi Artono Budi Triyono Budi Triyono Dimas Nur Prakoso Hanifah N. K. N. Hanifah N. Kumalaningrum Hanum Arrosida Hidayatullah, Nur Asyik imam basuki Jasa Kusumo Haryo Kumala Mahda H Kumala Mahda Habsari Narava Kansha Putra P R. Jasa K. H R. Jasa Kusumo R. Oktav Yama Ricky Febri Aryo Ryan Wicaksono Santi Triwijaya Santi Triwijaya Satrio Nugroho Suluh Argo Pambudi Yuli Prasetyo Yulius Harry Widodo