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All Journal R.E.M (Rekyasa Energi Manufaktur) Jurnal JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Journal of Engineering and Scientific Research (JESR) Jurnal Abdimas Serawai
Asep Dharmanto
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Religion Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mechanical Engineering Nursing Public Health Social Sciences

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Strength Analysis of Tubular Oil to Oil Cable Box Power Transformer GIS 60 MVA in the Case of Voltage Arc Energy Using the Finite Element Analysis Method Asep Dharmanto; Asep Saepudin; Wilarso Wilarso
Journal of Engineering and Scientific Research Vol. 4 No. 2 (2022)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v4i2.111

Abstract

The power transformer is an essential part of the electrical distribution system because it must be reliable and safe from fire and explosions, one of which is brought on by internal oil arching that results in overheating. In general, on the high voltage side of the transformer, there are power transformers fitted with tubular oil to oil cable boxes for the demands of the client. The tubular oil to oil cable box is installed to reduce space in substations with limited space as well as to boost safety against weather and pollution at the high voltage terminal section of power transformers. The goal of this investigation is to determine the cause of an explosion that occurred in a tubular oil-to-oil cable box on the high voltage side of a Gas Insulation System (GIS) type power transformer with a power of 60 MVA and a voltage rating of 150/20 kV. For all parties involved, this incident will serve as a lesson about what to avoid doing in the future with similar power transformers. In this study, we will use a qualitative method with Finite Element Analysis (FEA), which takes samples and data of a Gas Insulation System (GIS) power transformer on the high voltage side, especially in the analysis of tubular strength. This power transformer has a voltage rating of 150/20 kV and a power of 60 MVA. Applying normal pressure to a pressure that could harm the tubular oil to oil cable box can prevent damage. The tubular oil to oil cable box is built of SS400 material and has an 8mm thickness so that it can be determined how robust it is.
Wear Analysis of Gear Pump Supply Fat Coating Liquid Cat Food Wilarso; Mupah Rizal; Asep Saepudin; Asep Dharmanto; Mohd. Yuhazri Yaakob; C.W. Mohd Noor
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v8i1.11093

Abstract

Trochoid Top 208 HBM Nippon Oil Pump (NOP) is an important unit in the cat food manufacturing process. The pump system acts as a fluid transfer agent by directing fluid from the tank to the nozzle channel. Based on Pareto and Fishbone diagram data, it was found that the main causes of problems that often occur with the Nippon Oil Pump (NOP) Type Trochoid Top 208 HBM are filter blockage (5 times) and pump gear wear (3 times). The aim of this analysis is to reduce damage to the Nippon Oil Pump (NOP) Type Slocoid Top 208 HBM and increase the production of higher quality cat food. From the results of the analysis carried out, there were several findings that caused wear on the gear pump, including the viscosity of the material being channeled which was very thick, reaching 1.37 cp. Meanwhile, the pump specifications used are only 2L/minute with a pump motor power of 0.75kw 1.86A 380V. The filter pore particles are too small, reaching 250 microns and the dimensions of the pipe used have a flow pipe diameter of ½”. From the analysis carried out, replace the pump capacity to a minimum of 4L/minute, then replace the filter with pore particles of 600 microns. And the pipe uses a diameter of 1".
Analysis of the Influence of Changes In Workpiece Rotation and High Speed Steel Lathe Tool Angles on the Surface Roughness of ST37 Workpieces Hilman Sholih; Izar Mahmud Syuhada; Asep Dharmanto; Asep Saepudin; Wilarso; C.W. Mohd Noor
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 1 (2024): June 2024 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v8i1.11094

Abstract

Turning is a machining process used to shape products by cutting a rotating workpiece with a sharp chisel. One of the problems that occurs in the turning process is the level of surface roughness that does not meet the specified specifications. Even though the dimensions are in, the final product is rejected because the surface is too rough. The level of surface roughness is determined by several factors, including cutting speed, rotation speed and cutting edge geometry. Lathe tool geometry consists of clearance angle, relief angle, rake angle, and back rake angle. This research aims to determine the effect of spindle rotation speed and tool angle on the level of roughness of the workpiece on a lathe. Spindle rotation speed 300 rpm and 600 rpm. The only change in the tool geometry is the clearance angle with angles of 10°, 20° and 30°. The workpiece material used is ST37. The chisel material used is High speed steel (HSS). Testing of the results of the turning process is carried out by comparing the surface roughness with a surface roughness comparator. Cutting speed is not changed. From the research results, the recommended angle is an angle of 10º with the surface roughness results obtained being N5.
Pelatihan K3 di SMK 1 Muhammadiyah Cileungsi, Bogor, Jawa Barat Wilarso, Wilarso; Asep Saepudin; Asep Dharmanto; Muhammad Ilham Alhabsyie
JURNAL ABDIMAS SERAWAI Vol. 4 No. 1 (2024): Jurnal Abdimas Serawai (JAMS)
Publisher : Program Studi Administrasi Fakultas Ilmu Sosial dan Ilmu Politik Universitas Muhammadiyah Bengkulu 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36085/jams.v4i1.6082

Abstract

Dalam hal keselamatan kerja tidak membedakan faktor umur, jenis kelamin, status, jabatan, semua manusia bisa mengalami kecelakaan kerja jika tidak mengikuti peraturan yang telah diterapkan oleh instansi. Oleh karenanya tujuan dari program PKM ini adalah memberikan pendampingan dasar implementasi terkait aspek K3, agar mereka memiliki bekal dasar mengenai teori K3, jenis-jenis potensi bahaya ditempat kerja dan pentingnya peranan 5R sebagai dasar pondasi program improvement lainnya dan kaitannya dengan unsur safety dalam bekerja, pemahaman dasar ini penting sebagai pembekalan sebelum mereka berkecimpung dalam dunia kerja. Metode dalam pengabdian ini melalui kuliah dan diskusi tatap muka di sekolah SMK 1 Muhammadiyah Cileungsi-Bogor, Jawa Barat. Diharapkan dapat menggugah kesadaran siswa/i dan menjadi budaya positif dan bisa mengaplikasikan pengetahuan tersebut disetiap kegiatan sehari-hari
Pelatihan dasar autocad bagi siswa dan siswi di lingkungan SMK Muhammadiyah Cileungsi Asep Saepudin; Asep Dharmanto; Wilarso, Wilarso; Hilman Sholih; Aswin Domodite; Muhamad Ali Pahmi
JURNAL ABDIMAS SERAWAI Vol. 4 No. 1 (2024): Jurnal Abdimas Serawai (JAMS)
Publisher : Program Studi Administrasi Fakultas Ilmu Sosial dan Ilmu Politik Universitas Muhammadiyah Bengkulu 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36085/jams.v4i1.6339

Abstract

Kompetensi siswa dan siswi di tingkat Sekolah Menengah Kejuruan sering mengalami kendala dalam hal pemahaman dasar gambar Teknik. Pada saat lulus sekolah tingkat pemahaman dasar gambar Teknik masih rendah. Sehingga tingkat serapan lulusan di dunia industry masih diragukan. Tujuan di selenggarakan pelatihan dasar perihal gambar Teknik ini untuk meningkatkan kompetensi siswa dan siswi di lingkungan SMK Muhammadiyah 2 Cileungsi. Metode dalam pelaksanaannya tatap muka dan mempraktekan cara menggambar Teknik di computer yang sudah terinstall software autocad. Dari hasil pelatihan yang dihadiri 40 peserta, dimana dari kelas teknik kendaraan ringan dan teknik komputer jaringan. Pembukaan kegiatan disampaikan oleh Hilman Sholih, dimana pentingnya pelatihan ini untuk meningkatkan kemampuan siswa dan siswi mengenai dasar gambar teknik. Paparan pengenalan dasar solid word yang disampaikan oleh pemateri pertama Asep Dharmanto. Dalam penjelasan tersebut menjelaskan fitur pada solid word untuk memudahkan dalam mengambar. Paparan kedua disampaikan oleh Asep Saepudin. Paparan perihal pengertian dasar solid word lebih memudahkan dalam proses mengambar 3D. sedangkan penjelasan mengenai dasar autocad, lebih ke 2 D dan menjelaskan dasar symbol yang sering dipergunakan pada cara mengambar autocad. Minat siswa dan siswi selama mengikuti dan ketertarikan perihal gambar teknik cukup tinggi dan diharapkan kegiatan ini berlanjut sampai di level guru dan toolman. Supaya memudahkan dalam proses pembelajaran dikelas
Strength Analysis of Crusher Construction in Nyamplung Seed Peeling Machine Using the Finite Element Method Nandang Imam Santosa; Asep Dharmanto; Asep Saepudin; Wilarso
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 8 No. 2 (2024): December 2024 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v8i2.11757

Abstract

The nyamplung seed peeling machine uses a single roll crusher as its operating principle to automatically separate the nyamplung fruit's shell. One of the crucial parts of this apparatus that breaks down the nyamplung fruit shells is the crusher. The issue arises from the fact that the strength of the material utilized to construct the crusher is still unknown. This raises questions regarding how well the Nyamplung bean peeling machine crusher will function if it is used constantly. The purpose of this study is to identify the kind of material that works well for a nyamplung seed peeling machine crusher. An analysis will be conducted to ascertain the strength of the Nyamplung seed peeling machine crusher to follow up on this issue. The finite element method was used to conduct the testing. ASTM A36 and AISI 304 are the two materials that are compared in this analysis. In addition, it can be used to compare two different types of materials in terms of their strength, cost, and degree of safety. Following analysis for manual shaft calculations utilizing AISI 304 and ASTM A36 materials. With a yield strength of 250 N/mm², a safety factor of 9, a displacement of 0.022 mm, and von Mises stress readings of 29.044 N/mm² were achieved from the crusher simulation utilizing ASTM A36 material. Von Mises stress for the AISI 304 material was 28.471 N/mm², displacement was 0.023 mm, safety factor was 7, and yield strength was 206.804 N/mm².
Sweep Frequency Response Analysis for Assessment Deformation Core at Power Transformer Wilarso, Wilarso; Asep Saepudin; Hilman Sholih; Asep Dharmanto
Journal of Engineering and Scientific Research Vol. 6 No. 2 (2024)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v6i2.156

Abstract

SFRA (Sweep Frequency Response Analysis) is a transportation test where one of the purposes of this test is to ensure that the core of the power transformer does not shift due to the journey from the factory to the field. The SFRA testing is divided into 4 frequency range areas from 20 Hz to 20 MHz and this research is focused on the frequency range below 2 KHz, based on experience at this frequency to check transformer core problems and specific failures in shifting power transformer cores. Based on the comparison results of SFRA testing carried out at the power transformer factory during the FAT (Factory Assessment Test) with testing in the field during the first SAT (Site Assessment Test) and with the second SAT testing, there are differences in the frequency area below 2 KHz, this shows that there is a problem in the area power transformer core, before drawing a final conclusion that there is a problem or deformation in the transformer core, you must look at the results of other tests carried out in the field such as ratio test, winding resistance test, tangent delta test, excitation current test, insulation resistance (megger test). ) winding and core-frame as well as impact recorder data during the journey from the factory to the field. If all other field test results are good then the power transformer is still in good condition and ready to operate and the difference in the graph at a frequency of less than 2 KHz in the SFRA test during SAT compared to when FAT is likely to be caused by residual magnetism that is still on the core side due to testing. DC before or. Residual magnetism can occur due to static electrical phenomena due to the oil purification process or due to the induction effect of the network grounding system where the power transformer is placed
Design and Construction of Prototype of CNC Plasma Cutting Machine Simulator 3 Axis Based on Stepper Motor and Mach3 PC Software Asep Dharmanto; Nur Rofiq; Asep Saepudin; Aswin Domodite; Wilarso
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 9 No. 1 (2025): June 2025 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v9i1.14289

Abstract

In a workshop, the machining or cutting process of plates must be done quickly and accurately, while most of them are still done manually or by hand. One of the technologies used today is the CNC (Computerized Numerical Control) machine which is one of the results of the development of machining technology that can be operated automatically and continuously, so that it can support the need for requests for complex workpiece shapes, high accuracy and in large quantities. In its processing, this workpiece is very difficult to do with a manual process or with ordinary tools. To overcome this, a CNC plasma cutting machine design was made. CNC plasma cutting is a CNC machine whose motion system can move the plasma eye or torch according to computer commands. The design of this plasma cutting machine is carried out with a design process to determine the dimensions of the machine and calculations to determine the specifications of the drive motor, with the design of the electric wiring diagram and the selection of controller selection specifications for the system. By testing the precision of the tool during the experiment. The purpose of this design is to create a CNC plasma cutting machine with easily obtainable materials and capable of carrying out complex plate cutting work with high tool precision. This CNC plasma cutting machine uses 3-axis CNC as the main driver, namely the X axis, Y axis and Z axis, and is operated with Mach3 software as a CNC machine controller and uses a stepper motor to move the axis axis. Mach3 software was chosen because it has an easy configuration because there is an auto tuning feature in determining the precision of each axis and is easy to operate, and easy to get on the internet, so that with this CNC plasma cutting machine it can help a workshop in doing sheetmetal work efficiently and accurately which in the end can save material, time and cost of work
Analysis of Power Transformer Core Retaining Plate Damage During Ship Transportation Using Response Spectrum Method: Analisis Kerusakan Pelat Penahan Inti Transformator Daya Saat Transportasi Kapal Laut Menggunakan Metoda Response Spectrum Asep Dharmanto; Wilarso, Wilarso; Asep Saepudin; Djoko Wahyu K; Achmad Husen
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 1 (2025): June
Publisher : Universitas Muhammadiyah Sidoarjo

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

Abstract

Inti transformator daya diletakan di dalam tangki dengan kondisi pressfit 4 sisi di bagian dasar tangki dan 4 bagian sisi atas ditopang dari 4 arah terhadap gerakan longitudinal - transversal kemudian 2 pedestal atas inti transformer ditekan dengan tutup tangki di bagian bawahnya. Pada waktu transportasi di laut transformator ini mengalami impak yang terekam sebesar 4.1g, kemudian dengan penyidikan visual terlihat lepasnya pelat penahan dan inti transformator mengalami pergeseran dan kerusakan sehingga transformator harus dimanufaktur kembali di pabriknya. Analisa dinamika menggunakan metoda elemen hingga (finite element method) diperlukan untuk mengetahui apakah kegagalan penopang sudah terjadi di atas nilai percepatan 1g, sehingga nilai 4.1g adalah benturan inti transformator ke tangkinya. Pemodelan dibuat 3D shell wall modeling orisinil untuk penopang dan tangki, sedangkan model inti transformator bentuknya disederhanakan menjadi kotak shell untuk memudahkan meshing. Parameter input menggunakan High Required Response Spectrum 0.5g dari IEEE std 693-2005 sedangkan parameter dinamik yang diukur adalah besarnya ragam getar, fenomena resonansi dan tegangan (stress) pelat. Hasil data analisa dinamik dengan menggunakan metoda elemen hingga yaitu transformator mengalami resonansi dengan dek kapal, atau bila terjadi impak di badan kapal akibat goyangan ombak di percepatan di atas 1g maka pelat penahan telah mengalami tegangan di atas kekuatan tariknya (Tensile Strength).
Co-Authors Achmad Husen Asep Saepudin C.W. Mohd Noor Djoko Wahyu K Domodite, Aswin Izar Mahmud Syuhada M Ali Pahmi Mohd. Yuhazri Yaakob Muhammad Ilham Alhabsyie Mupah Rizal Nandang Imam Santosa Nur Rofiq Sholih, Hilman Wilarso, Wilarso