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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) JURNAL NASIONAL TEKNIK ELEKTRO Indonesian Journal of Electrical Engineering and Computer Science Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Jurnal Amplifier: Jurnal Ilmiah Bidang Teknik Elektro dan Komputer Jurnal Andalas: Rekayasa dan Penerapan Teknologi Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) ASEAN Journal for Science and Engineering in Materials
Rudy Fernandez
Jurusan Teknik Elektro, Universitas Andalas
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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Rogowski coil sensor in the digitization process to detect partial discharge Eka Putra Waldi; Asri Indah Lestari; Rudy Fernandez; Syaifa Mulyadi; Yoshinobu Murakami; Naohiro Hozumi
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 2: April 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i2.14282

Abstract

This paper presents the construction of a Rogowski Coil sensor with an air core to detect partial discharge using a digital oscilloscope. Two types of sensors are used. The first is the primary sensor winding with back wire, and the second is without back wire, labeled BW and WBW, respectively. The numbers of primary-turn in the sensors are 5, 10, 20, and 40 turns. The performance of the sensors is tested using two types of tests. First, the wave response test with a fixed imitation partial discharge magnitude input is used to select the optimum sensitivity with the lower sampling rate, aims to select the peak or valley value as a magnitude partial discharge value. The second test is using an imitation partial discharge ramp to check the linearity of the sensors. The imitation of the partial discharge inputs is generated by a commercial charge calibrator. The wave response test results show an increase in the number of turns that corresponds to an increase of the sensor output for both sensors in a non-linear trend. In determining the sampling rate, the detection of magnitude in the valley is better than the peak. All sensors act linear toward the imitation partial discharge ramp either in BW or WBW conditions.
PENGABDIAN PADA MASYARAKAT DENGAN PEMANFAATAN TEKNOLOGI WIRELESS ROUTER DI MUSHALA AL-MAHIRA AIE PACAH PADANG Baharuddin Baharuddin; Ikhwana Elfitri; Rudy Fernandez; Hanalde Andre; Amirul Luthfi; Rizki Wahyu Pratama; Zurnawita
Jurnal Andalas: Rekayasa dan Penerapan Teknologi Vol. 5 No. 1 (2025): Juni 2025
Publisher : Electrical Engineering Department Faculty of Engineering Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jarpet.v5i1.102

Abstract

Pengabdian kepada masyarakat merupakan salah satu pilar dalam Tridharma Perguruan Tinggi yang dilaksanakan oleh Kelompok Bidang Keahlian (KBK) Telekomunikasi, Teknik Elektro, Universitas Andalas, sebagai upaya memberikan solusi terhadap permasalahan di masyarakat. Kegiatan ini memanfaatkan teknologi wireless router untuk meningkatkan konektivitas internet di Mushala Al-Mahira, Aie Pacah, Padang. Program ini bertujuan mendukung kegiatan keagamaan dan sosial, seperti kajian daring, pelatihan teknologi untuk anak-anak, dan komunikasi internal pengurus mushala. Artikel ini menguraikan tahapan pelaksanaan program yang meliputi survei awal, instalasi perangkat, pelatihan pengelolaan jaringan, hingga evaluasi dampak. Hasil kegiatan menunjukkan bahwa teknologi wireless router secara signifikan meningkatkan akses internet, mempermudah penyebaran informasi, dan mendorong produktivitas masyarakat sekitar mushala. Kegiatan ini membuktikan bahwa teknologi dapat menjadi solusi praktis dan berkelanjutan dalam mendukung transformasi digital di komunitas lokal.
Impact of Relative Humidity on Electrochemical Performance of MXene-Zn-CNC Composite Films Rudy Fernandez; Hairul Abral; Ikhwana Elfitri
ASEAN Journal for Science and Engineering in Materials Vol 4, No 2 (2025): AJSEM: Volume 4, Issue 2, September 2025
Publisher : Bumi Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study examines the influence of relative humidity (RH) on the electrochemical and structural properties of polyvinyl alcohol (PVA) composite films reinforced with MXene, zinc oxide (ZnO), and cellulose nanocrystals (CNC). Composite films were fabricated via solvent casting and conditioned at RH levels of 50%, 75%, and 94%. Cyclic voltammetry and four-point probe tests revealed substantial enhancements in current density, specific capacitance, and bulk conductivity with increasing RH, attributed to improved ionic mobility and interfacial polarization. X-ray diffraction indicated reduced crystallinity due to polymer swelling, while scanning electron microscopy showed enhanced MXene dispersion at higher RH. Fourier-transform infrared spectroscopy confirmed intensified hydroxyl interactions, reflecting increased hydrophilicity. These humidity-induced improvements suggest promising applications in humidity-responsive flexible electronics and sensors. However, potential trade-offs include reduced mechanical stability under prolonged exposure. The findings offer new insights for optimizing hydrophilic polymer composites to enhance environmental adaptability and advanced device performance. 
Co-Authors . Darwison Abral, Hairul Alex Surapati Amirul Luthfi Angraini, Rina Ariadi Hazmi Asri Indah Lestari Astuti, Tiara Feryndita Baharuddin Abbas, Baharuddin Baharuddin Baharuddin Bobby Arma Sugara Budi, Baik Chatarina Umbul Wahyuni Eka Putra Waldi Febrian Akbar Pratama Firdaus Firdaus Firdaus Firdaus Fitrilina Fitrilina Fitrilina Hanalde Andre Hendy Santosa Ida Ayu Putu Sri Widnyani Ikhsan, Intan Aprillia Ikhwana Elfitri Ikhwana Elfitri Intan Aprilia Ikhsan Junas Haidi M. H. Ahmad Masayuki Nagao Muhammad Imran Hamid Naohiro Hozumi Novizon, Novizon Pratama, Febrian Akbar Pratama, Rizki Wahyu Pratama, Rizki Wahyu Primas Emeraldi Ramadhamy, Queen Hesti Rika Ampuh Hadiguna Riko Nofendra Rizki Wahyu Pratama Syaifa Mulyadi Syaifa Mulyadi Syukri Arief Syukri Yunus Vanzir Firmansyah Yoshinobu Murakami Zurnawita Zurnawita Zurnawita Zurnawita Zurnawita Zurnawita