ac arc
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2021 ◽  
Vol 9 (2) ◽  
pp. 239-251
Author(s):  
Dimas Okky Anggriawan ◽  
Audya Elisa Rheinanda ◽  
Muhammad Khanif Khafidli ◽  
Eka Prasetyono ◽  
Novie Ayub Windarko

Series Arc Fault is one of the disturbances of arcing jump is caused by gas ionization between two ends of damaged conductors or broken wire forming a gap in the insulator. Series arc fault is the primary driver of electrical fire. However, lack of knowledge of the disturbance of series arc fault causes the problem of electrical fire not be mitigated. Magnitude current is not capable to detect of series arc fault. Therefore, this paper proposes fast fourier transform (FFT) to detect series AC arc fault in low voltage using microcontroller ARM STM32F7NGH in real time. A cheap and high speed of microcontroller ARM STM32F7NGH can be used for FFT computation to transform signal in time domain to frequency domain. Moreover, in this paper, protection of series AC arc fault is proposed in the real time mode. In this experimental process, some various experiments are tested to evaluate the reliability of FFT and protection with various load starts from 1 A, 2 A, 3 A, 4 A in resistive load. The result of this experiment shows that series AC arc fault protection with STM32F7 microcontroller and FFT algorithm can be utilized to ensure series AC arc fault properly.


2021 ◽  
Vol 2131 (5) ◽  
pp. 052078
Author(s):  
V V Vasilev

Abstract The aim of the study is to improve the technical and economic performance of the normal electrocorundum production process in an ore-thermal furnace by automated control of the melt composition at the final stage. The essence of the research is to exploit the valve effect of an AC arc. The expression for the Al2O3 content in the melt was obtained from the electrical characteristics of the melt. Studies have shown a fairly high degree of accuracy in the convergence of the results of the proposed method with laboratory data.


2021 ◽  
Author(s):  
Kamal Chandra Paul ◽  
Tiefu Zhao ◽  
Chen Chen ◽  
Yunsheng Ban ◽  
Yao Wang

AIP Advances ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 095009
Author(s):  
Qirong Wu ◽  
Kai Yang ◽  
Rencheng Zhang ◽  
Ran Tu ◽  
Xuejin Zhou

2021 ◽  
Vol 35 (4) ◽  
pp. 58-64
Author(s):  
Jong-Min Lim ◽  
Chung-Seog Choi

In this study, we designed and fabricated a system based on IEC-62606 and UL-1699 such that stable arc discharge could be produced. AC arc discharge was performed to interpret the restrike pattern and radiation spectrum according to the electrode material. In the voltage waveform analysis of flat copper electrodes, it was analyzed that the accompaniment cycle of the negative waveform was more unstable than the half cycle of the positive waveform. We observed that the radiation spectrum of copper electrodes occurred in the ultraviolet and visible light regions. Moreover, the voltage waveform of the carbon electrode was found to be similar to the pattern produced by the copper electrode. However, we observed that the restrike generated at the half cycle of the negative waveform was produced relatively faster. The radio spectra were strongest near 589 nm, 671 nm, and 766 nm. AC arc discharges using copper electrodes and carbon electrodes were found to be between the arc-discharge patterns of copper electrodes and carbon electrodes. It has been proven that depending on the material of the electrode, there are differences in voltage list like, current patterns, and radiated spectra bands.


2021 ◽  
Vol 21 (10) ◽  
pp. 1621-1631
Author(s):  
Chang-Ju Park ◽  
Hoang-Long Dang ◽  
Sangshin Kwak ◽  
Seungdeog Choi

2021 ◽  
Vol 54 (19) ◽  
pp. 195202
Author(s):  
D F N Santos ◽  
M Lisnyak ◽  
N A Almeida ◽  
L G Benilova ◽  
M S Benilov

Author(s):  
Yao Wang ◽  
Linming Hou ◽  
Kamal Chandra Paul ◽  
Yunsheng Ban ◽  
Chen Chen ◽  
...  

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