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INDONESIA
Jurnal Mahasiswa TEUB
Published by Universitas Brawijaya
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Education
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Articles 25 Documents
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Search results for , issue "Vol. 12 No. 2 (2024)" : 25 Documents clear
PENGARUH PERBESARAN LUAS ELEKTRODA TERHADAP PROBABILITAS TEGANGAN TEMBUS PADA DIELEKTRIK MINYAK MENGGUNAKAN SUMBER TEGANGAN TINGGI DC Astari, Bela Natasya; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
Publisher : Jurnal Mahasiswa TEUB

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Abstract

The electrode is an electrical conductor that is used to determine a breakdown voltage and functions as a tip medium where the positive and negative sides are opposite. The shapes of electrodes are very diverse, one of which is rod electrodes. This research will describe the effect of increasing the electrode area on the probability of breakdown voltage in oil dielectrics using high DC voltage. The research method used is to collect data through testing breakdown voltage, leakage current and oil conductivity at the High Voltage Laboratory, Department of Electrical Engineering, Faculty of Engineering, Brawijaya University and carrying out electric field simulations for each variation of electrode area magnification with FEMM 4.2 software. The electrode variations used in testing breakdown voltage and leakage current are A, 2A, 3A, 4A, and 5A. Breakdown voltage testing was carried out with the same distance between electrodes, namely 2 mm, on an oil dielectric using Shell Diala B oil. The results obtained from this research were the influence of increasing the electrode area on the probability of breakdown voltage and leakage current level. Where the greater the area magnification value, the smaller the breakdown voltage value and the greater the leakage current level. Apart from that, the five variations of electrode area magnification have the same homogeneity factor where the electric field distribution is even. Keywords: Electrodes, Enlargement, Probability, Shell Diala B Oil
PENGARUH PERBESARAN LUAS ELEKTRODA TERHADAP PROBABILITAS TEGANGAN TEMBUS PADA DIELEKTRIK UDARA MENGGUNAKAN TEGANGAN TINGGI DC Fianto, Aulia Ramadhan; Dhofir, Moch.; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Breakdown voltage can be a random phenomenon that can cause electrical damage, especially DC electric power systems which are being developed because they have advantages over AC electric power systems. One of the components in an electric power system is a conductor wire with a small resistance value which can reduce power losses. One way to reduce the resistance value is to increase the cross-sectional area of the conducting wire, which can also be called the law of area enlargement. This research will describe the effect of increasing the electrode area on the probability of breakdown voltage in air dielectrics using high DC voltage. Leakage current data collection is needed to obtain the air resistance value at each electrode magnification and breakdown voltage data collection using the up and down method is carried out at the High Voltage Laboratory, Department of Electrical Engineering, Faculty of Engineering, Brawijaya University. Electric field simulations were carried out using FEMM 4.2 software with varying magnification of electrode areas A, 2A, 3A, 4A, and 5A. Keywords - Enlarging of Area, electrode, breakdown voltage, high voltage DC
EVALUASI SISTEM PROTEKSI PETIR INTERNAL PADA INSTALASI PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) KALI JARI Faishal, Luthfi Nur; Utomo, Teguh; Dhofir, Moch.
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Evaluation of the Internal Lightning Protection System in Micro Hydro Power Plants (MHPP) needs to be carried out to support the continuity of generator work so that the supply of electrical energy is not interrupted. The evaluation carried out included the internal lightning protection system and the existing grounding system at the Kali Jari PLTMH. Based on the lightning protection level of the SNI 03-7015-2004 standard, an efficiency value of 36.47% is obtained at protection level IV with an efficiency value of 0-80%. To obtain the rated value of an arrester for an internal lightning protection system, it is necessary to know the value of the induced voltage that occurs in the network where the distribution lines are open enough to be exposed to indirect strikes. Using calculations from the simplified Rusck method, it was concluded that the change in the value of the induced voltage due to a lightning strike to the distance is inversely proportional following a hyperbolic function, while the change in the current strength of a lightning strike is directly proportional to the induced voltage. The induced voltage entering the lightning protection system ranges from 0.041 kV to 2.684 kV. In evaluating the internal protection system, it was concluded that the existing arrester as a protection device was not in accordance with the needs of the protection system, and that the arrester was needed to be replaced because it had reached its working limit. Arresters according to protection system requirements have a test class T2 that is suitable for securing equipment in the system. Then, the grounding system does not comply with PUIL 2011 standards. So it is necessary to design improvements; 10 conductor rods for 4.8Ω ground resistance using a conservative approach. Meanwhile, the BS 7430:2011 standard approach uses 14 conductor rods with a distance of 2 meters for a ground resistance of 4.76Ω or 12 conductor rods with a distance of 3 meters for a ground resistance of 4.97Ω. Keywords: Lightning, Internal Lightning Protection System, Induced Voltage, Arrester, Earth Resistance
KARAKTERISTIK PERUBAHAN POLA TEGANGAN DAN ARUS PEMBEBANAN MODUL SURYA DENGAN REFLEKTOR ALUMINIUM PADA SUDUT INKLINASI YANG BERVARIASI Syarif, Habib; Wibawa, Unggul; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Electricity is considered a vital energy source that is inseparable from the lives of communities, companies, and industries. This is evidenced by the significant increase in demand in Indonesia. Due to the increasing demand for energy, there is a need to transition to renewable energy. Indonesia has a potential of 442 GW of renewable energy, with the largest potential being solar energy at 207.8 GWp. Solar energy can be converted into electrical energy using solar modules. However, the efficiency of solar modules needs to be considered and improved, for example by installing reflectors positioned at an appropriate angle of inclination. The research method used was an experiment involving the installation of aluminum reflectors and variations in inclination angles. The reflectors were installed on one side or both sides, while the inclination angles varied between 30°, 45°, 60°, 75°, and 90°. The solar module used was a 20WP polycrystalline type connected to 13 units of 1.5-Watt DC LED lamps, each with its own switch. Voltage, current, and output power data are presented in line graphs, which yield regression equations that facilitate data analysis. The research findings consist of voltage, current, sunlight intensity, and temperature data provided in a table. The obtained data was analyzed to produce other quantities such as output power and input radiation. Voltage, current, and output power data are presented in line graphs, which yield regression equations that facilitate data analysis. Additionally, the top ten output power data will be displayed in a bar graph. The operation of installing a reflector has a significant impact on the voltage and current values at inclination angles of 60˚ and 75˚. The highest output power is achieved when using two aluminum reflectors, an inclination angle of 60˚, and a load of 19.5 Watt. Keywords: solar module, voltage, current, reflector, output power.
RESETTING RELE DIFERENSIAL DALAM MEMPERSIAPKAN UPRATING TRAFO 70/20 kV MENJADI 150/20 kV DI GARDU INDUK BLIMBING Mubarok, M. Farid Ibnu; Dhofir, Moch.; Utomo, Teguh
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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Penelitian ini menjelaskan mengenai re-setting rele diferensial sebagai proteksi transformator di Gardu Induk Blimbing. Re-setting rele diferensial ini dilakukan karena adanya uprating transformator. Uprating transformator dilakukan untuk mendapatkan kapasitas gardu induk yang lebih tinggi. Penelitian ini dimulai dengan menentukan nilai hubung singkat pada Gardu Induk, rating PMT, rasio CT, setting diferensial, dan slope. Peneliti akan menggunakan perhitungan matematis. Dimana nilai perhitungan matematis akan disimulasikan menggunakan software ETAP. Berdasarkan hasil perhitungan matematis dan simulasi didapatkan nilai hubung singkat pada sisi primer adalah 1717 A untuk hubung singkat 3 fasa, 1487 A untuk hubung singkat 2 fasa, dan 1071 A untuk hubung singkat 1 fasa ke tanah. Sedangkan di sisi sekunder transformator memiliki nilai hubung singkat sebesar 12900 A untuk hubung singkat 3 fasa, 11172 A untuk hubung singkat 2 fasa, dan 7527 A untuk hubung singkat 1 fasa ke tanah. Nilai Pemutus yang digunakan dalam proteksi pada sisi primer adalah 20 kA dan pada sisi sekunder sebesar adalah 25 kA. Nilai Rasio transormator arus pada sisi primer dan sekunder secara berturut-turut adalah 300:1 dan 2000:1. Selanjutnya untuk hasil perhitungan arus setting dan diferensialnya adalah 0,396 A dengan besar slope 1 sebesar 11,87 % dan slope 2 sebesar 23,74%. Kata kunci— Uprating Transformator, Hubung Singkat, Setting Rele

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