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Pengaruh Perbesaran Jumlah Elektroda Terhadap Probabilitas Tegangan Tembus pada Dielektrik Minyak Menggunakan Sumber Tegangan Tinggi AC Verdiansyah, Muhammad Akmal Zahran; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
Publisher : Jurnal Mahasiswa TEUB

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Tegangan tembus merupakan fenomena acak yang dapat menyebabkan kerusakan listrik. Salah satu komponen dalam sistem tenaga listrik adalah kawat penghantar dengan nilai resistansi yang kecil yang dapat mengurangi rugi-rugi daya. Salah satu cara untuk memperkecil nilai resistansi tersebut adalah dengan memperbesar luas penampang pada kawat penghantar atau memperbanyaknya yang dapat disebut juga hukum perbesaran luas atau enlargement law. Hal ini tentu akan berpengaruh terhadap probabilitas akan terjadinya breakdown voltage. Pada penelitian ini akan diuraikan mengenai pengaruh perbesaran jumlah elektroda terhadap probabilitas tegangan tembus pada dielektrik minyak menggunakan sumber tegangan tinggi AC. Elektroda yang digunakan dalam pengujian adalah eletroda batang-batang yang terbuat dari bahan stainless steel. Pengujian tegangan tembus dilakukan sebanyak 25 kali untuk mendapatkan nilai probabilitas tegangan tembus dengan perhitungan menggunakan software Microsoft Exel. Jarak antar elektroda yang digunakan besarnya sama pada setiap variasi perbesaran yaitu 2 mm. Dieletrik yang digunakan adalah dieletrik cair yaitu menggunakan minyak Shell Diala B. Pengambilan data arus bocor dilakukan tidak dengan terjadinya tembus menggunakan variasi tegangan 1 kV, 3 kV, dan 5 kV pada setiap variasi elektroda. Pengujian arus bocor diperlukan untuk mendapatkan nilai resistansi pada setiap perbesaran jumlah elektroda. Penelitian ini dilakukan di Laboratorium Tegangan Tinggi, Departemen Teknik Elektro, Fakultas Teknik, Universitas Brawijaya. Untuk simulasi medan listrik dilakukan dengan menggunakan software FEMM 4.2 dengan variasi perbesaran jumlah elektroda 1 pasang, 2 pasang, 3 pasang, 4 pasang, dan 5 pasang. Hasil simulasi medan listrik menunjukkan bahwa pada kelima variasi elektroda memiliki distribusi medan listrik yang merata. Sedangkan pada pengujian arus bocor nilainya meningkat apabila elektroda mengalami perbesaran. Selanjutnya dilakukan perhitungan nilai resistansi yang nilainya menurun apabila elektroda mengalami perbesaranjumlah sesuai dengan hukum ohm yang berarti nilai tegangan tembus juga akan menurun. Selanjutnya pada pengujian tegangan tembus, diperoleh bahwa probabilitas tegangan tembus meningkat jika elektroda mengalami perbesaran jumlah. Artinya saat elektroda mengalami perbesaran jumlah, maka kemungkinan terjadinya tembus akan semakin meningkat. Untuk penelitian selanjutnya disarankan untuk lebih menambah variasi jarak sela, menggunakan jenis dielektrik minyak yang berbeda, dan melakukan penelitian dengan variasi perbesaran elektroda serta jenis elektroda yang lainnya.Kata Kunci: Tegangan tembus, perbesaran jumlah, probabilitas, minyak Shell Diala B
Analisis Pengaruh Suhu Terhadap Nilai Tegangan Tembus pada Minyak Kacang Tanah Sebagai Isolasi Cair Setiawan, Aditya Rizky; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
Publisher : Jurnal Mahasiswa TEUB

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This journal discusses the effect of temperature on the breakdown voltage value of peanut oil to determine the suitability of peanut oil as a liquid insulation in high voltage equipment. The temperature increase is done by heating the oil to a predetermined temperature, namely 24.5 ° C (room temperature), 40 ° C, 50 ° C, 60 ° C, and 70 ° C. Electrical testing (a series of breakdown voltage tests), physical (by testing water content using the gravimetric method carried out at the Chemical Engineering Laboratory, Brawijaya University), and calculating the conductivity value (by measuring leakage current using a DC circuit) and permittivity (using an LCR multimeter). The test was carried out to determine the suitability of peanut oil as an insulating oil. The test results showed that the breakdown voltage values of peanut oil at temperatures of 24.5°C (room), 40°C, 50°C, 60°C, and 70°C were respectively 18.36 kV, 19.06 kV, 23.2 kV, 28.18 kV, and 33.95 kV. In the water content test, the values of peanut oil at 24.5°C (room) and peanut oil at 70°C were 993.6 ppm and 486.6 ppm, respectively. In the conductivity test, the values of peanut oil at 24.5°C (room) and peanut oil at 70°C were 21.23× 10^(-9) S/m and 18.22× 10^(-9) S/m, respectively. The results of the relative permittivity test obtained the values of peanut oil at 24.5°C (room temperature) and peanut oil at 70°C were 2.49 and 2.89, respectively. It can be concluded that the effect of increasing temperature can increase the breakdown voltage value of peanut oil, however, from the test data that meets the SPLN 49 standard in 1982, which is 30kV/2.5mm, peanut oil at a temperature of 70°C with a voltage value of 33.95 kV/2.5mm, while at other temperatures it has not met the SPLN 49 standard in 1982. When viewed from the water content level, peanut oil has not met the maximum standard permitted by SPLN 49 in 1982, which is 30 ppm. Keywoards: Breakdown voltage, water content, conductivity, relative permittivity, insulating oil, peanut oi
ANALISIS KELAYAKAN MINYAK TRANSFORMATOR DIDASARKAN PADA PARAMETER STANDAR MINYAK ISOLASI PADA TRANSFORMATOR DAYA 60 MVA DI GARDU INDUK KILIRAN JAO Fikri, Al Hadi; Dhofir, Moch.; Utomo, Teguh
Jurnal Mahasiswa TEUB Vol. 12 No. 6 (2024)
Publisher : Jurnal Mahasiswa TEUB

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Abstract

Testing and analyzing the condition of power transformer oil is very important to ensure the reliability and optimal performance of the transformer during operation. This research was conducted on the 60 MVA unit 2 power transformer at Kiliran Jao Substation with a focus on testing transformer oil characteristics and dissolved gas analysis (DGA). This transformer has a strategic role in electrical power distribution, where transformer oil is used as an insulating and cooling medium to support optimal device performance. This research consists of several stages. The first stage is a literature study, which is carried out by collecting theories through relevant articles, journals, and previous research to support the research discussion. The second stage is field observation, which is carried out at PT PLN (Persero) UPT Padang to learn how to take oil samples and the parameters tested. The transformer studied was a 60 MVA 150 kV power transformer unit 2 with serial number 3011170055. Furthermore, primary and secondary data were collected. Primary data includes transformer specifications and field test results, while secondary data includes historical data of previous test results. These data are then processed to analyze the physical and chemical condition of the transformer oil and detect dissolved gases that indicate potential internal faults. The data obtained was evaluated by comparing it against the IEEE 2008 standard to determine the operational feasibility of the transformer oil. The DGA test results show that the total combustible gas concentration (TDCG) is at Condition 1, which means the transformer oil is still safe for normal operation. However, there are indications of ethane gas (C₂H₆) in Condition 4, with concentrations exceeding the threshold indicating potential overheating in the temperature range of 300°C to 500°C. Testing the characteristics of transformer oil shows that parameters such as breakdown voltage, moisture content, acid content, viscosity, color, sediment, flash point, and interface tension are in good condition according to applicable standards. In conclusion, although the transformer oil is still suitable for use, intensive monitoring is needed of certain parameters, especially ethane gas, to anticipate the potential for overheating that can interfere with transformer reliability. Routine maintenance and advanced analysis are needed to maintain oil quality and prevent transformer damage, so that the operational sustainability of the power distribution system can be guaranteed. This research emphasizes the importance of periodic testing as a preventive measure to improve electrical system reliability.Keywoards: Analysis, Dissolved Gas Analysis, Characteristics, Nynas Nitro Lybra oil
Co-Authors Achmad, Baihaqi Adinda, Kejora Cinta Adityara, Farrel Billy Al Fawwaz, Muhammad Ghozi Ali Mustofa Andiena, Rina Andreyanto, Tegar Setyo Angkasa, Aulia Ardiansyah, Muhammad Doni Ardiansyah, Zakaria Ariella, Syafika Safa Assami, Emir Faruq Astari, Bela Natasya Badriyah, Intan Layla Darsono, Wiwin Diwirya, Raihandika Putra Kusuma Erni Yudaningtyas Faishal, Luthfi Nur Fatahillah, Muhammad Fianto, Aulia Ramadhan Fikri, Al Hadi Firdausi, Aditya Mahardika Ganendra, Risang Gaol, Gerald Matthew Lumban Ghifari, Ahmad Goegoes Dwi Nusantoro Gumintang, Adnan Gymnastiar, Muhammad Ilham Hadi Suyono Haidar, Achmad Handoyono, Tito Tri Imtiyaz, Kholis Jagad, Mohammad Wahyu Kharsya, Artnezzar Khawarizmy, Muhammad Zinedine Latif, Nabila Fauziah Lestariyanto, Arthur Rahmad Maulana, Eka Mauludi, Mohammad Zidan Maynaki, Erlangga Rizky Mubarok, M. Farid Ibnu Muyassar, Tegar Prasetyo, Achmad Ari Dwi Prastiawan, Hilmi Arif Pratama, Muhammad Arkan Restu Pratomo, Setyo Fajar Purba, Andreas Putra Christiawan Purba, Yobel Yehezkiel Putra, Deni Dwi Rahman Ramadhan, Muhammad Dicky Rasyid, Athallah Rini Nur Hasanah Risnugroho, Brian Rizal, Mohammad Iqbal Fakhrur Rizqiyatullah, Muhammad Rafli Satria, Muchamad Iqbal Setiawan, Aditya Rizky Sinaga, Andreas Sober Siregar, Josua Hatorangan Siswandi, Wawan Sitompul, Ezra Ananda Situmorang, Haryadi Putra Syarifasa, Arkananta Sydney, Agnes Amadea Rullynda Teguh Utomo Thuhu, Dias Satriyo Tri Nurwati Unggul Wibawa Verdiansyah, Muhammad Akmal Zahran Wardhana, Anak Agung Sagung Gede Paramitha Wijaya, Rizki Adi Wijono, n/a Yuka, Helmi Dwi ‘Aqila, M. Farrel Nikkola Putra