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Saepudin, Asep
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Advantage power transformer low Losses with a case study on 30/60 MVA 150/20/10 kV transformers Asep Saepudin; Hilman Sholih
TEKNOSAINS : Jurnal Sains, Teknologi dan Informatika Vol 11 No 1 (2024): TEKNOSAINS: Jurnal Sains, Teknologi dan Informatika
Publisher : LPPMPK- Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/tekno.v11i1.978

Abstract

Transformers have a lengthy service life of 30 to 40 years and are used to transfer electrical power to distribution and transmission systems. The great efficiency and low losses of this static electricity machine are two of its advantages. can aid in lowering greenhouse gas emissions and protecting the environment. While transformers can experience several losses, two main types of losses typically arise: 1. Ohmic or copper losses; and 2. Core or iron losses. This study compares the benefits of low-loss transformers (143 kW) to high-loss transformers (258 kW). It focuses solely on the design and environmental aspects of copper losses (also known as load losses) and core losses (sometimes known as no-load losses). This study's methodology combines qualitative and quantitative methods with a case study of a 30/60 MVA transformer with a voltage rating of 150/20 kV and a mineral oil cooling system. The study concludes is that low-loss transformer design is important, this results in an efficiency increase from 99.57% to 99.80%, losses of 55.4% lower, and an approximate 25% increase in total weight. Environmentally speaking, it can reduce greenhouse gas emissions by approximately 31,347.87 tCO2e, making it more cost-effective, competitive, and environmentally friendly than transformers with 258 kW of total losses
Analisis Overall Equipment Effectiveness dalam Penerapan Total Productive Maintenance Pada Mesin Flow Mixer di PT ASI Wilarso; Bayu Hamengku Rizkiansyah; Asep Dharmanto; Asep Saepudin; Mujiarto
JURNAL ILMIAH MOMENTUM Vol 22 No 1 (2026): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v22i1.15469

Abstract

Improving machine productivity and effectiveness is a crucial factor in maintaining the competitiveness of manufacturing companies. One approach to improving equipment performance is Total Productive Maintenance (TPM), with Overall Equipment Effectiveness (OEE) as the primary indicator. This study aims to analyze the effectiveness of the Flow Mixer machine at PT ASI's Mold Shop Department based on its OEE value, which comprises availability, performance, and quality. It also identifies the dominant factors causing low machine effectiveness using the Six Big Losses approach and a fishbone diagram. The research data were obtained from production data, planned and unplanned downtime, the number of defective products, and machine operating time during September–November 2025. The calculation results show that the Flow Mixer machine's OEE values ​​were 66% (September), 68% (October), and 68% (November), respectively, which are still below the world-class OEE standard of 85%. The main factors influencing the low OEE are breakdowns and process defect loss. Improvement proposals are based on the eight pillars of TPM, which focus on improving machine maintenance, operator skills, and standardizing work procedures. Implementation of the proposed improvements in December resulted in an increase in the OEE value to 72%. The results of this study demonstrate that consistent TPM implementation can improve the effectiveness of the Flow Mixer machine and the productivity of the production process.
Rancang Bangun Dies Pierching untuk Proses Pelubangan Cover Armrest Plastik Kursi di PT. XYZ Giardyan Komara; Asep Dharmanto; Wilarso; Hilman Sholih; Asep Saepudin; Dan Mugisidi
JURNAL ILMIAH MOMENTUM Vol 22 No 1 (2026): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v22i1.15471

Abstract

Proses pelubangan pada cover amrest plastik di PT. XYZ saat ini masih dilakukan secara manual menggunakan gerinda tangan sehingga berpotensi menimbulkan ketidakkonsistenan kualitas serta rendahnya produktivitas. Penelitian ini bertujuan merancang dan membuat dies plecing untuk meningkatkan presisi dan efisiensi proses pelubangan. Material cover armrest menggunakan plastik ABS dengan ketebalan 3 mm dan nilai shear strength sebesar 67 MPa. Perancangan dies dilakukan menggunakan perangkat lunak Autodesk Fusion 360, kemudian diproduksi menggunakan mesin CNC milling dan diuji mesin press berkapasitas 15 Ton. Hasil perhitungan menunjukkan kebutuhan gaya pelubangan sebesar 8,46 tonf untuk dua lubang. Pengujian menunjukkan bahwa dies piercing mampu menghasilkan lubang sesuai spesifikasi dimensi dan meningkatkan kapasitas produksi secara signifikan dari 90 set per shift pada proses manual menjadi 1.920 set per shift. Hasil penelitian menunjukkan bahwa penerapan dies piercing efektif meningkatkan presisi proses serta efisiensi produksi pada komponen cover armnest plastik.
Co-Authors Achmad Hufad Adhha, Nurul Ahmad Faqih Aji Setiawan Anisa, Risma Nur Apriani, Tasia ardhayaguna, Daffa Nur Ardiwinata, Jajat Sudrajat Ari Bramasto Aris Setiawan Arsadani, Qosim Asep Dharmanto Asep Dharmanto Aswin Domodite Aswin Domodite Avrilliany, Eka Awang Surya Awang Surya Ayi Astuti Az Zahra, Puti Azzasyofia, Mira Badriatin, Tine Bambang Yulianto Bayu Hamengku Rizkiansyah Bayu Wijayanto Bidayati, Kholis Burhan, Mukhammad Agus Ce Gunawan Cuenza, Yves P Dan Mugisidi Deni Deni Dharmanto, Asep Djohan Djohan Domodite, Aswin ELA YULAELIAH Elih Sudiapermana, Elih Fahira, Salma Fahmi Abdillah, Ahmad Fahri, Muhamad Fathurrahman Djamil Fauzi Ramdani Fitriaji, Abdul Azis Fitriani, Tri Sat Giardyan Komara Gifthera Dwilestari Haikal, Muhammad Akbar Hazmi, Raju Moh Hengky_agus, khurotul_aini Hilman Sholih Hilman Sholih Hilman Sholih Hilman Sholih Hleihel, Reem Ihat Hatimah Iip Saripah, Iip Jaelani Syurdiansyah Jajat S Ardiwinata, Jajat S Kartanegara, Haruman Taufik Khoidul Umam Khopipah, Tsania Siti Lubis, Amany B. Lucky Radi Rinandiyana Madinah, Dzahra Al Mahliatussikah , Hanik Makhsun, Makhsun Masitoh, Noneng Mohamad Anas Sobarnas Muhammad Amin Suma Muizzudin, Moh Mujiarto Mujiarto Mulyana, Edy Mustofa Kamil, Mustofa Muzaki, Kiki Adnan Noorzaman, Sandi Nugroho, Aji Santoso Nurfadhilla, Mursyida nurhamim, nurhamim Nursahidin, Nursahidin NURUL HAYATI Nurul Murtadho Ockativian, Rizky Ferari Pambayun, Gandes Permana, Elih Sudia Pracoyo, Wisnu Pramudia, Joni Rahmat Priana, Pajar Purnomo Purnomo Rachman, Ditto Saepoel Rahma Sandhi Prahara Rahmanda, Gita Astyka Rahmat Pangestu, Rahmat Rajessa, Ray Virana Ratnasari, Sri Rian Setiawan Rindiani, Ani Rosmia, Ade Romi Rudi Indrawan Saepuloh Jamal, Moh Yusup Sahara, Ari Sardin Satoto, Angga Bimo Sholeh, M. Asrorun Niam Sholih, Hilman Solihah, Eneng Sriyono Sriyono Steven Getha Pradessa Subuh, Subuh Sukotjo, Sukotjo Sunardi, Stanislaus Suryadi Suryadi Sutisna, Rizki Entis Taswanda Taryo Tati Ruhmawati Ulfah, Saly Ulhage, Ahza Al Amal Umar Tsani Abdurrahman Upay Ripa’I Uyu Wahyudin Wahyudi, Kristanto Wawan Hardiyanto Wicaksono, Meidias Abror Widyastuti, Ipuk Wilarso Wilarso, Wilarso Wisnu Pracoyo Wiwit Widiansyah Yahya, Faridah Hanim Yanti Shantini, Yanti Yuli Yasin