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Moch. Dhofir
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Education Engineering

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Minyak Kelapa Beraditif Minyak Zaitun sebagai Isolasi Peralatan Tegangan Tinggi Moch. Dhofir; Nur Rahma Dona; Unggul Wibawa; Rini Nur Hasanah
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 11 No. 2 (2017)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (794.458 KB) | DOI: 10.21776/jeeccis.v11i2.475

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This paper discusses the improvement of dielectric strength of dielectric coconut oil using olive oil to be used as an alternative to liquid insulation on high voltage equipments. Increasing the breakdown voltage level has been done by adding olive oil of 5% -25% into coconut oil. Heating was considered to reduce the water content in coconut oil. Electrical testing (using breakdown voltage test), physical testing (by testing the water content using oven method), and analysis of the acid content of simple saturated fat using mixing formula, have been performed to determine the feasibility of coconut oil as insulation agent. The test results indicated the breakdown voltage of a pure coconut oil value of 23.47kV / 2.5mm, which did not fulfilled the IEC 156 standard, which is 30kV/2.5mm. The addition of olive oil could increase the breakdown voltage level to 38.73 kV / 2.5 mm and if the heating can reach 51.15kV/2.5mm. The highest breakdown volatge level of 54.01kV/ 2.5mm could be obtained by mixing the olive oil and heating the coconut oil at once. ell. It can be concluded that the addition of olive oil could decrease the saturated fatty acid content from 91% to 72.2%, whereas the heating could reduce the water content from 2697 ppm to 361 ppm. From the point of view of water content, the modified coconut oil could not meet the maximum permitted standard JIS 2320, which is 50 ppm. Based on the achieved breakdown voltage level, the considered coconut oil will be able to work on electrical equipment with a working voltage level of 0.75 kV-13.2 kV.
ANALISIS PENGARUH KANDUNGAN UDARA TERHADAP KEKUATAN DIELEKTRIK GAS TETRAFLOROETANA DALAM MEDAN TINGGI AC NONHOMOGEN Nararya Berlianti; Moch. Dhofir; Lunde Ardhenta
Jurnal Mahasiswa TEUB Vol. 10 No. 2 (2022)
Publisher : Jurnal Mahasiswa TEUB

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ABSTRAKPenelitian ini menjelaskan tentang pengaruh konsentrasi udara terhadap dielektrik gastetrafloroetana dalam medan tinggi ac non-homogen. Penelitian ini diawali denganpengambilan data melalui pengujian tegangan tembus di Laboratorium Tegangan Tinggi,Jurusan Teknik Elektro, Fakultas Teknik Universitas Brawijaya. Variasi kondisi yangdigunakan dalam pengujian tegangan tembus meliputi perubahan konsentrasi udara dalam gasR134 sebesar 0%, 5%, 10%, 15%, 20%, 25%, dan 30% yang dihitung berdasarkan tekanantotal gas campuran, variasi tekanan total gas campuran sebesar 755 mBar, 805 mBar, 855mBar, 905 mBar, dan 955 mBar, serta perubahan jarak sela sebesar 2 cm dan 4 cm. Pengujiandilakukan dengan menggunakan tegangan tinggi AC. Susunan elektroda yang digunakanadalah jarum – piring. Hasil yang didapatkan dalam penelitian ini yaitu adanya pengaruhmengenai konsentrasi udara dalam gas R134 dimana besarnya nilai tingkat kekuatan dielektrikgas R134 murni lebih tinggi dibandingkan dengan gas R134 yang telah terkontaminasi, dalamhal ini udara merupakan pengotornya. Selain itu, variasi rasio konsentrasi udara dari 0% sampai30% dan variasi rasio tekanan total gas campuran dari 755 mBar sampai 955 mBarmemengaruhi nilai kekuatan dielektrik gas campuran. Dimana semakin besar nilai konsentrasiudara maka akan semakin kecil nilai tegangan tembus. sedangkan semakin besar nilai tekanantotal gas campuran maka akan semakin besar nilai tegangan tembus.Kata kunci: isolator gas, tetrafloroetana, udara, tegangan tembus, kekuatan dielektrik. ABSTRACTThis study describes the effect of air concentration on the dielectric of tetrafluoroethane gasin a non-homogen ac high field. This research begins with data collection through breakdownvoltage testing at the High Voltage Laboratory, Department of Electrical Engineering,Faculty of Engineering, Universitas Brawijaya. Variations of conditions used in thebreakdown voltage test include changes in air concentration in RI 34 gas by 0%, 5%, 10%,15%, 20%, 25%, and 30% which are calculated based on the total pressure of the mixed gas,the variation of the total pressure of the mixed gas. of 755 mBar, 805 mBar, 855 mBar, 905mBar, and 955 mBar, as well as changes in the distance between 2 cm and 4 cm. The test usesa high voltage AC circuit. The arrangement of the electrodes used is a needle – plate. Theresults obtained in this study are the influence of air concentration in RI 34 gas where thevalue of the dielectric strength of pure RI 34 gas is higher than that of contaminated RI 34gas, in this case air is the impurity. In addition, variations in the air concentration ratio from0% to 30% and the variation of the total pressure ratio of the mixed gas from 755 mBar to955 mBar affects the dielectric strength of the mixed gas. Where the greater the value of airconcentration, the smaller the value of the breakdown voltage. while the greater the value ofthe total pressure of the mixed gas, the greater the value of the breakdown voltage.Keywords: gas insulator, tetrafluoroethane, air, breakdown voltage, dielectric strength.
Co-Authors Lunde Ardhenta Nararya Berlianti Nur Rahma Dona Rini Nur Hasanah Unggul Wibawa