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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Dirhamsyah Dirhamsyah
Politeknik Pelayaran Surabaya
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Industrial & Manufacturing Engineering Mechanical Engineering

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Hardware implementation of series DC arc fault protection using fast Fourier transform Dirhamsyah Dirhamsyah; Diana Alia; Dimas Okky Anggriawan
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 19, No 5: October 2021
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v19i5.20521

Abstract

This paper proposes method of series DC arc fault protection using low cost microcontroller. Series DC arc fault occurs when gap between conductor or wire flows a current. Series DC arc fault can cause fire hazard if do not detected and protected. However, Series DC arc fault is difficult to detected using conventional protection. To detect series DC arc fault accurately using fast Fourier transform (FFT). FFT is used to transform signal in time domain to frequency domain. Series DC arc fault has different characteristic compared by normal current in frequency domain. Therefore, the proposed algorithm for protection of series DC arc fault based on magnitudes of the current in frequency domain. Hardware system is implemented by 100 V DC power supply and DC arc fault generator. Test result is conducted experimentally under varying of load current such as 2 A, 2.5 A, 3 A, 3.5 A, 4 A and 5 A. Experimental testing results show that Series DC arc fault protection has time for trip of 0.48 s, 0.26 s, 1.04 s, 0.68 s, 0.44 s and 0.48, respectively. The fastest time for trip is 0.26 s with current of 2.5 A. Therefore, the proposed algorithm for series DC arc fault protection can operate to trip accurately and have the good performance.
Penurunan Kualitas Bahan Bakar pada Purifier Akibat Kerusakan Ball Bearing yang Mempengaruhi Poros Shaft Aditiya Rahmat Febriyansyah; Dirhamsyah Dirhamsyah; Indah Ayu Johanda Putri; Antonius Edy Kristiyono
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 4 No. 4 (2026): November: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v4i4.1745

Abstract

This research explores the impact of ball bearing damage on fuel quality in purifiers, specifically in relation to its effect on the shaft. Damaged ball bearings can cause various problems in purifiers, such as increased friction, decreased efficiency, and potential further damage to related components. An analytical method was used to identify the condition of ball bearing damage in the purifier and observe the changes that occur in the shaft and the quality of the processed fuel. The results showed that ball bearing damage had a significant impact on reducing the quality of fuel processed by the purifier. The conclusion of this study emphasizes the importance of regular and timely maintenance on the ball bearing and shaft of the purifier to ensure optimal performance and quality of the fuel produced. Further studies can be conducted to explore effective maintenance strategies to address the problem of ball bearing damage in purifiers.
Pengaruh Kerusakan Ejector Pump terhadap Kinerja Fresh Water Generator Abednego Ivanda Aldebaran; Dirhamsyah Dirhamsyah; Indah Ayu Johanda Putri; Rama Syahputra Simatupang
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 4 No. 4 (2026): November: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v4i4.1767

Abstract

Ejector pump is an important component in the Fresh Water Generator system that functions to produce and maintain vacuum conditions to support the seawater evaporation process. This study aims to determine the effect of Miura type MLP-50N ejector pump damage on the performance of the Fresh Water Generator on MV Eastern Hope. The research method used was a quantitative method with simple linear regression analysis, t-test, and coefficient of determination assisted by Microsoft Excel. Data were obtained through observation, documentation, engine log book, instruction manual, and literature studies. The results showed that damage to ejector pump components such as impeller, mechanical seal, O-ring, and mouth ring caused a decrease in discharge pressure, resulting in reduced vacuum performance and freshwater production of the FWG. The analysis results showed an R² value of 99.77% and a significance value of 0.000 < 0.05, proving that ejector pump damage has a significant effect on the performance of the Fresh Water Generator.
Co-Authors Abednego Ivanda Aldebaran Aditiya Rahmat Febriyansyah Alia, Diana Antonius Edy Kristiyono Dimas Okky Anggriawan Putri, Indah Ayu Johanda Rama Syahputra Simatupang