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Ahmad Daelami
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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A Review: Reliability Assessment of Isolated Phase Busduct Through FMEA and RCFA Methodologies Iskandar, Handoko Rusiana; Ahmad Daelami; Awang Rahmawan Prakoso; Cepi Arifin; Miftah Farid
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 24 No 1 (2025): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol24no1.737

Abstract

This research discuss the reliability of the Isolated Phase Busduct (IPB) geothermal generating unit still needs to be improved because the same disturbances still occur, where in the 2018-2023 period these disturbances have contributed to a Loss Production Opportunity of around 65 billion rupiah. Therefore, this research will provide suggestions or suggestions for what factors need to be improved so that the reliability of IPB in each geothermal power plant unit increases. The methods used in this research are failure mode and effect analysis (FMEA) and the Root Cause Failure Analysis (RCFA) method, where FMEA helps in identifying potential failures and determining mitigation priorities and determining the value of the Risk Priority Number (RPN), Root Cause Failure Analysis (RCFA) reveals the main causes of failures that have occurred, from these two methods it is known that the disturbances that occur can actually be identified earlier by 91.2% as well as factors such as manufacture design, aging equipment, improper installation, Lack of Quality Control, and inappropriate mobilization must be eliminated in an effort to increase IPB's reliability where these factors must be considered from the project phase to the operational phase.
Studi Kejenuhan pada Current Transformer (CT) Akibat Arus Hubung Singkat Setia, Giri Angga; Een Taryana; Naufal Nur Aiman; Ahmad Daelami; Hikmah Prasetia
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 22 No 1 (2023): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol22no1.535

Abstract

The CT saturation analysis approach model was carried out using ATPDraw and Mathcad software simulations. Input simulation data obtained from CT testing at West Priok Substation, namely ratio, excitation curve V-rms-Irms, Rct. Based on the simulation results, the CT model was successfully implemented for CT conditions at the West Priok Substation which experienced saturation, as seen from the results of the distorted waveforms and the THDi value of 40.612%. These results are then compared with the IEC 61869-2 standard with the parameters obtained from the CT-Analyzer test on E-t, Ek, Ie, Kx, and Rct, that E-t is -1%, Ek is 635.25 V, Ie is 13.5 mA, Kx of 0.084 and Rct of 7432.57 ohm. This result is a deviation from the specified standard, meaning that the CT is damaged and saturated. After replacing the CT, it was tested again and the value of E-t was -0.010%, Ek was 936.09 V, Ie was 9.68 mA, Kx was 14.39 A, Rct was 4.226 ohm, and the waveform simulation results were not distorted, then the THDi value obtained by 0.08%. This indicates that the CT is in good condition and does not experience saturation when the short circuit current is 20 kA.
Co-Authors Awang Rahmawan Prakoso Cepi Arifin Een Taryana Giri Angga Setia Hikmah Prasetia Iskandar, Handoko Rusiana Miftah Farid Naufal Nur Aiman