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All Journal Sinusoida: Jurnal Penelitian dan Pengkajian Elektro SAINSTECH: Jurnal Penelitian dan Pengkajian Sains dan Teknologi

Abdul Multi

Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia

Author-ID : 217828

Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

Published : 16 Documents Claim Missing Document

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Articles

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Studi Analisis Daya Hasil Proses Regeneratif Pada Motor Elevator Mohammad Dicky Rivandi; Abdul Multi
SINUSOIDA Vol 19 No 1 (2017): Jurnal Penelitian dan Pengkajian Elektro
Publisher : INSTITUT SAINS DAN TEKNOLOGI NASIONAL

AbstrakPada saat ini kemajuan teknologi sangat berkembang pesat diberbagai bidang, tak terkecualidi bidang transportasi gedung yaitu Eskalator dan Elevator. Perusahaan yang bergerak dibidang elevator berlombaâ€“lomba mencari inovasiâ€“inovasi baru yang bertujuan untukkemajuan teknologi yang menghasilkan produk elevator yang efisien, ramah lingkungan,handal dan untuk mendapatkan keuntungan yang lebih besar. Sehingga ditemukan inovasibaru yang sangat bermafaat bagi perkembangan di bidang elevator yaitu penemuanpengereman Regeneratif.Pengereman regeneratif adalah sebuah sistem pengereman dengan menkonversikan energimekanis mejadi energi listrik, sehingga energi yang dihasilkan dapat dimanfaatkan kembali.Dari proses pengereman regeneratif daya listrik yang dihasilkan akan disalurkan kembali kejalaâ€“jala listrik gedung. Proses regeneratif terjadi pada sistem kinerja elevator pada saatkondisi tanpa beban, posisi berjalan naik ke atas dan pada saat kondisi beban penuh, posisiberjalan ke bawah.Daya listrik yang dihasilkan dari proses regeneratif ini dapat dimanfaatkan kembali untuksuplai beban listrik. Lokasi pengujian beban terletak di proyek RSUD Bekasi yang memilikiempat unit elevator. Pengujian Pengereman regeratif pada 2 motor dengan kapasitas yangberbeda telah diperoleh hasilnya. Masing-masing pada total kedua daya motor 26,6 kWmenghasilkan daya sebesar 18,2 kW dan pada total kedua daya motor berdaya 20,2 kWmenghasilkan daya sebesar 16,8 kW.

Perencanaan Saluran Kabel Bawah Tanah Pada Instalasi Pengolahan Gas Mukhamad Surya Hudha; Abdul Multi
Sinusoida Vol 21 No 2 (2019): Jurnal Penelitian dan Pengkajian Elektro
Publisher : INSTITUT SAINS DAN TEKNOLOGI NASIONAL

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Saluran kabel yang dipasang di daerah pengolahan gas berbeda dengan saluan kabel yang dipasang di daerah lainnya. Karena daerah ini berbahaya dimana memiliki potensi ledakan akibat adanya gas. Sehingga perlu direncanakan secara tepat mengenai saluran kabel bawah tanah pada instalasi pengolahan gas. Dalam menentukan jenis dan ukuran kabel perlu dipertimbangkan klasifikasi area atau zone dan metode instalasi kabel, data beban , data kabel, dan pengaman. Perlu juga dipertimbangkan kenaikan suhu pada saat terjadi short circuit, berdasarkan faktor derating, dan berdasarkan voltage drop. Kabel N2XSEBY dengan penghantar tembaga dan isolasi XLPE dipilih untuk dipasang di daerah ini. Kabel tersebut ditanam ke dalam tanah secara langsung agar memiliki fungsi sebagai pengaman mekanik apabila terjadi perambatan api ketika terjadi kebakaran. Ukuran kabel yang didapatkan adalah 35 mm2 untuk kabel tegangan menengah 20 kV dan ukuran 120 mm2 untuk kabel tegangan menengah 6.6 kV.

PERANCANGAN PLTMH MEMANFAATKAN DISCHARGE POMPA BRINE BLOWDOWN PADA PLTGU Gede Bayu Mahendra; Abdul Multi
Sinusoida Vol 22 No 2 (2020): Jurnal Penelitian dan Pengkajian Elektro
Publisher : INSTITUT SAINS DAN TEKNOLOGI NASIONAL

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PLTMH adalah Pembangkit Listrik Tenaga Mikro Hidro yang memanfaatkan energi potensial maupun energi kinetik dari air untuk diubah menjadi energi listrik. Pembuatan PLTMH pada PLTGU Tanjung Priok bertujuan untuk efisiensi serta menciptakan energi terbarukan dari discharge pompa motor Brine Blowdown yang ada pada Desalination Plant. Desalination Plant berfungsi mengubah air laut menjadi air tawar yang nantinya digunakan untuk air penambah pada sistem Steam Turbin, sistem Hidran dan air sealing pada unit Pembangkit. Pemanfaatan potensi energi kinetik, berupa aliran air dari discharge pompa Brine Blowdown sebesar 386 m3/h mempunyai daya hidrolis sebesar 10kW. Untuk dapat mengkonversi potensi energi ini menjadi energi listrik diperlukan perancangan turbin air serta pemilihan generator berkapasitas 10Kw. Sistem pembebanan diperlukan untuk menjaga kualitas tegangan output PLTMH saat terjadi perubahan beban. Dari hasil perancangan, PLTMH ini menggunakan jenis turbin air tipe Pelton dengan diameter 30 cm dan 21 sudu turbin air. PLTMH ini mampu beroperasi dengan beban 7 kW dengan output tegangan 251VAC/53Hz. Dari hasil commisioning, didapatkan PLTMH ini beroperasi ideal pada beban 5 kW dengan output tegangan sebesar 230VAC/49,7Hz.

Motor Induksi Fasa Tiga Tipe Rotor Sangkar Sebagai Generator Induksi Dengan Variasi Hubungan Kapasitor Untuk Eksitasi Rahmi Berlianti; Abdul Multi; Baskoro Abhi P
SAINSTECH: JURNAL PENELITIAN DAN PENGKAJIAN SAINS DAN TEKNOLOGI Vol 26 No 2 (2016): SAINSTECH
Publisher : Institut Sains dan Teknologi Nasional

Motor induksi fasa tiga dapat dapat dioperasikan sebagai generator induksi fase tiga. Kecenderungan menggunakan generator induksi (rotor sangkar) sebagai pengganti generator sinkron juga semakin meningkat khususnya untuk PLTMh kecil dengan beban penerangan (resistif). Hal ini dikarenakan alasan perawatannya rumit, susah didapat dipasaran, dan harganya mahal. Generator induksi penguatan sendiri, memiliki banyak keuntungan dibandingkan dengan generator sinkron seperti tidak perlu sikat-sikat atau baling-baling rotor, pengurangan ukuran, dan harga yang murah. Akan tetapi generator induksi menawarkan regulasi tegangan yang lemah dan nilainya bergantung pada kecepatan penggerak, kapasitor, dan beban. Pada penelitian ini digunakan motor induksi fasa tiga rotor sangkar 0,9 KW, 2,7 A, pf 0,84, 50 Hz sebagai generator induksi, dengan variasi hubungan kapasitor Bintang dengan nilai kapasitansi 25μF, Delta 8μF, dan C-2C 8μF dan 16μF untuk beban R-RL yang variatif. Hasil dari penelitian menunjukkan performance dari motor fasa tiga yang difungsikan sebagai generator pada tegangan konstan hubungan delta dan C-2C memiliki putaran dibawah putaran sinkronnya antara 1285 sampai 1413 rpm. Dan untuk frekuensi konstan diperoleh tegangan setiap hubungan berkisar antara 373 V sampai 164 V. Dan dari ketiga hubungan kapasitor tersebut yang lebih baik adalah hubungan bintang dengan kapasitansi 25 μF.

STUDI PENGARUH PENYETELAN RELE JARAK PADA SALURAN UDARA TEGANGAN TINGGI 150 KV TERHADAP KAWAT PENGHANTAR HVCRC 1x310 mm² dan ACCC 1x310 mm² Andri Yulias Saputra; Abdul Multi
SAINSTECH: JURNAL PENELITIAN DAN PENGKAJIAN SAINS DAN TEKNOLOGI Vol 31 No 1 (2021): Sainstech : Jurnal Penelitian dan Pengkajian Sains dan Teknologi
Publisher : Institut Sains dan Teknologi Nasional

The faults Overhead line is generally caused by short circuit, overload, lightning surge, and tree. Distance relay is one of the protection equipments over the overhead line, and as the main protection by measuring fault impedance magnitude and comparing it to intended impedance. Distance relay setting has wide working area ranging from zone-1, zone-2, and zone-3. The setting must be adjusted when the equipment replacement exists. The replacement of overhead line conductor wire of ACSR 1 x 240 mm² into HVCRC 1 x 310 mm² and ACCC 1 x 310 mm² causing the necessity of re-setting adjustment in purpose of obtaining the appropriate one. This thesis is done by quantitative method which needs parameters in term of number. According to the calculation, the setting is obtained that zone-1 = 41,29257 Ω by t1 = instantaneous, zone-2 = 58,82457 Ω by t2 = 0,8 second, and zone-3 = 69,34377 Ω by t3 = 1,6 second.

ANALISA PROTEKSI OVER CURRENT RELAY (OCR) DAN GROUND FAULT RELAY (GFR) PADA TRANSFORMATOR DAYA GARDU INDUK Abdul Multi; Thufail Addaus
SAINSTECH: JURNAL PENELITIAN DAN PENGKAJIAN SAINS DAN TEKNOLOGI Vol 32 No 1 (2022): Sainstech : Jurnal Penelitian dan Pengkajian Sains dan Teknologi
Publisher : Institut Sains dan Teknologi Nasional

ABSTRACT In the electric power distribution system, the power transformer is an equipment plays an important role in a substation. In a distribution system, a fault cannot be predicted. This fault can be in the form of a 3-phase, 2-phase, or 1-phase short-circuit fault to ground. In order to prevent this, a good and reliable protective equipment is needed, one of which is the Over Current Relay (OCR) and Ground Fault Relay (GFR) which are used as backup protection for power transformers. The work principle of the OCR is to detect the presence of a short-circuit current between phases and the work principle of the GFR is to detect a short-circuit current from the phase to ground, the results of the analysis carried out describe when the fault current exceeds the predetermined setting value then Over Current relay and Ground fault Relay takes instantaneous decisions or by slowing down the opening of the PMT in the event of a disturbance. After doing the calculations, for the setting current (OCR) on the 150 kV side, 277.2 A was obtained with the TMS (OCR) time setting of 0.31 and for the setting current (GFR) on the 150 kV side, 35.22 A was obtained with the TMS time setting ( GFR) is 0.44. For the setting current (OCR) on the 20 kV side, 2,078.4 A is obtained with the TMS time setting (OCR) of 0.23 and for the setting current (GFR) on the 20 kV side, 96.07 A is obtained with the TMS time setting (GFR) namely 0.3. Keywords: Transformer, Over Current Relay, Ground Fault Relay, OCR, GFR

ANALISIS PENGUKURAN TANGEN DELTA PADA BAHAN ISOLASI GENERATOR Abdul Multi; Sigit Pudji Handojo
SAINSTECH: JURNAL PENELITIAN DAN PENGKAJIAN SAINS DAN TEKNOLOGI Vol 32 No 1 (2022): Sainstech : Jurnal Penelitian dan Pengkajian Sains dan Teknologi
Publisher : Institut Sains dan Teknologi Nasional

ABSTRACT An ideal insulation is equivalent to an ideal capacitor which only stores electrical energy and does not dissipate it. In fact, when a potential difference occurs in the insulation, the polar molecules in it will move and rub together continuously so that electrical energy is dissipated in the form of heat. This energy dissipation phenomenon is equivalent to that of a resistor. Measuring the quantities associated with capacitors and resistors and their tendency to change in value with an operating time unit is the best way to determine the condition of an insulation. The value of Capacitance C, Dissipation Factor (Tan δ ) and Power Factor (Cos θ) are three significant quantities to describe the condition of an insulation. These three quantities can be measured at the same time using the Schering Bridge method in an instrument test known as the Tan-δ instrument test. These three quantities when combined with other AC and DC measurements which also include testing with low, medium and high voltages (Over Voltage) will be an illustration related to the condition of the insulation whether it is still in good condition. Keywords: Schering Bridge, dissipation factor, tangent delta

INTEGRASI DISTRIBUSI DATA RADAR MENGGUNAKAN TEKNOLOGI BLOCKCHAIN DAN KRIPTOGRAF Fahmi Rosyidi; Masbah R.T. Siregar; Abdul Multi
SAINSTECH: JURNAL PENELITIAN DAN PENGKAJIAN SAINS DAN TEKNOLOGI Vol 32 No 3 (2022): Sainstech : Jurnal Penelitian dan Pengkajian Sains dan Teknologi
Publisher : Institut Sains dan Teknologi Nasional

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Abstract Currently radar is widely used in various fields such as meteorology, military, police, shipping, aviation, agriculture, disaster, and research. Meanwhile, currently the use of radar is still in the form of sectoral, partial, and fragmented so that the use of radar data is only internal. With Indonesia's geographical condition which is very broad and the integration and distribution of radar data has not been maximized, this has resulted in the lack of geographic area of Indonesia that is reached by radar. The use or exchange of radar data still uses client-server-based information technology, and with centralized storage which has risk factors for information security and privacy that are vulnerable to being misused or exploited. In addition, there is the possibility of data loss which makes it difficult to get data back, even when you have implemented a backup system with cloud or other protection, there is still a risk of complete data loss when compared to implementing a decentralized platform. Therefore, it is necessary to integrate and distribute radar data with a decentralized platform so that the radar data is not sectoral, partial, and fragmented. This integration and distribution of radar data will later be able to maximize the use of cross-field radar so that one radar can be used more optimally for all fields including meteorology, military, police, shipping, aviation, agriculture, disaster, and research. One technology that can be used for the integration of radar distribution is blockchain and cryptography. Blockchain and asymmetric cryptography in addition to increasing data security, can also guarantee that data entering the blockchain system comes from the correct source. The larger the bit asymmetric cryptographic key used, the more secure the data. Keywords — Radar, Blockchain, Cryptography, Integrated Distribution.

ANALISA ALIRAN DAYA SISTEM 20kV PADA PROYEK TUJUH BUKIT POWER SYSTEM MENGGUNAKAN SOFTWARE ETAP 12.6 Iriandi Ilyas; Bagas Arief Apri; Edy Supriyadi; Abdul Multi
SAINSTECH: JURNAL PENELITIAN DAN PENGKAJIAN SAINS DAN TEKNOLOGI Vol 32 No 3 (2022): Sainstech : Jurnal Penelitian dan Pengkajian Sains dan Teknologi
Publisher : Institut Sains dan Teknologi Nasional

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ABSTRACT Power flow analysis is important in planning in order to get a good electric power system. In planning the electrical system for the Tujuh Bukit Power System project with a 20kV system network located in Banyuwangi, East Java, a power flow simulation for a single line diagram will be carried out using the ETAP 12.6 software with the Newton Raphson method. The simulation results which consist of 22 buses show a voltage drop on the 0.4kV_ADR MCC Busbar2 bus and 0.4kV_50-MCC-01 Busbar2 bus. As a system improvement, the 0.4kV_ADR MCC Busbar2 bus will be installed with a 500 kVar capacitor bank to raise the voltage profile from 376.3 V to 385.56 V. While on the 0.4kV_50-MCC-01 Busbar2 bus, a 100 kVar capacitor bank is required to increase the voltage from 382.2 V to 384.16 V. After the repair, the power supplied to the system is 3589.6 kVA with a power factor of 90.5% lagging. As well as the reduction in the total value of system power losses from 58.1 kW + 242.2 kVar to 49.3 kW + 200.8 kVar. Keywords: Power flow, Netwon Rapshon, Simulation, Software ETAP 12.6

PROTOTIPE ALAT SISTEM SORTIR DIMENSI, BERAT DAN BARCODE KOTA TUJUAN BERBASIS MIKROKONTROLER ARDUINO MEGA 2560 Edy Supriyadi; Sultan Arfan Dzunnurain; Abdul Multi; Iriandi Ilyas
SAINSTECH: JURNAL PENELITIAN DAN PENGKAJIAN SAINS DAN TEKNOLOGI Vol 32 No 3 (2022): Sainstech : Jurnal Penelitian dan Pengkajian Sains dan Teknologi
Publisher : Institut Sains dan Teknologi Nasional

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ABSTRACT This prototype is a control system for sorting package based on dimensions, weight and the barcode of the destination city of the package. In this prototype, it has Load Cell sensor input as weight input in sorting, Barcode Reader for reading destination city input on the barcode, 2 Hc-Sr04 sensors as item dimension input and infrared sensor as item detection input. As for the output, namely 11 servo motors as actuators, and LCD. This tool works by sorting package into 4 areas of the destination city by reading barcode data for each item and 2 boxes in each area of the destination city, namely motorbike boxes for small items, and car boxes for large items. Package are declared large if the length, width, height, and weight exceed the specified kkm value, which is 10 cm with a tolerance of 1 cm and weight > 100 grams. From the sorting testing process, this tool yielded 93.34% success. Although there are still technical problems with the guider when positioning the goods. Keywords : Sorter, Ultrasonic, Barcode scanner, Load cell, Conveyor, Arduino Mega 2560

Co-Authors Agus Sofwan Andri Yulias Saputra Anna Setyawati Anthony Jayanto Ramadhan Bagas Arief Apri Bagas Arief Apriansyah Baskoro Abhi P Budi Santoso Djoko H. Nugroho Edy Supriyadi Fahmi Rosyidi Gede Bayu Mahendra Hafizh Mubarok Hendi Satria WD Hendri Satria WD Iriandi Ilyas Irwan Krisnadi Iwan Krisnadi Masbah R.T. Siregar Mohammad Dicky Rivandi Muhamad Ridwan Muhammad Nur Huda Muhammad Ridwan Mukhamad Surya Hudha Rahmi Berlianti Sigit Pudji Handojo Siti Zainab Sugianto . Sugianto Sugianto Sultan Arfan Dzunnurain Sultan Arfan Dzununrain Thufail Addaus

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