Results 11 to 20 of about 2,085,793 (277)

Analysis on frequency and impulse characteristics of grounding grid

The Journal of Engineering, 2019
Studying the frequency and impulse characteristics of grounding grids is of great reference value for the optimal design of the substation. As the frequency increasing, the variation trend of the grounding resistance under different conditions is not ...
Mengmeng Su, Yanhua Lin, Zhizhong Li, Sen Wang   +3 more
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Grounding Concepts: the Problem of Composition [PDF]

, 2011
In a recent book C.S. Jenkins proposes a theory of arithmetical knowledge which reconciles realism about arithmetic with the a priori character of our knowledge of it.
Forrai, Gábor
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Effect of Lightning Impulse Current on The Grounding System Model [PDF]

, 2021
The main purpose of the grounding system is to protect human, electrical appliance and building from electrical shock due to lightning or another form of electricity that hazardous. Therefore, to achieve this goal, the fundamental part must be taken into
et. al., Nur Aqilah Sofiyah Hasni,
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DataSheet1_Comprehensive evaluation of corroded grounding electrodes considering the impulse characteristics.docx

, 2023
The grounding electrodes are buried in a harsh soil environment, which will cause corrosion. Corroded grounding electrodes directly affect the safe and stable operation of the power system.
Jun Deng (239794), Zhanlong Zhang (14758306), Yihua Dan (14758309), Xuemeng Wang (3117015), Lan Xiong (213879)   +4 more
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Hazard evaluation of ground potential difference within grounding grid on personal safety under impulse current

IET Science, Measurement & Technology, 2021
Due to the impedance characteristic of conductor, the ground potential rise is different within grounding grid when impulse current is injected. When staff touches objects with different GPR at the same time, the GPD will be applied to human body ...
Chun Li, Xishan Wen, Lei Guo, Jiafeng Chen, Jiahao Chen, Hailiang Lu   +5 more
doaj   +1 more source

Reference values of impulse oscillometric lung function indices in adults of advanced age. [PDF]

, 2013
Impulse oscillometry (IOS) is a non-demanding lung function test. Its diagnostic use may be particularly useful in patients of advanced age with physical or mental limitations unable to perform spirometry.
Wichmann, Heinz-Erich, Rudolf A. Jörres, Margit Heier, Rudolf A. Jörres (340115), Behr, Jürgen, Holle, R., H.-Erich Wichmann (72009), H.-Erich Wichmann, Karrasch, S., Huber, R.M., Wichmann, H.-E., Rolf Holle, Rudolf M. Huber (412835), Nowak, Dennis, Peters, Annette, Joachim Heinrich (60421), Stefan Karrasch, Rudolf A Jörres, Rolf Holle (262610), KORA Study Group, Annette Peters (62601), Schulz, H., Holle, Rolf, Heier, M., Karrasch, Stefan, Annette Peters, Jürgen Behr (272687), Nowak, D., Holger Schulz, Dennis Nowak, Schulz, Holger, Peters, A., Huber, Rudolf M., Joachim Heinrich, Claudia Flexeder, Heinrich, Joachim, Rudolf M. Huber, H-Erich Wichmann, Claudia Flexeder (412834), Dennis Nowak (412836), Jürgen Behr, Heinrich, J., Rudolf M Huber, Margit Heier (200535), Watz, Henrik, Flexeder, Claudia, Behr, J., Flexeder, C., Stefan Karrasch (412837), Holger Schulz (13022), Jörres, R.A., Heier, Margit, Jörres, Rudolf A., Wichmann, H.-Erich   +53 more
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Effect of Ground Electrodes on the Susceptibility to Damage of Customer Premises Equipment (CPE) under Impulse Conditions

Energies, 2022
One of the requirements for the safe operation of customer premises equipment (CPE) is an adequate grounding system as a means to divert high fault currents to the ground.
Usman Muhammad, Normiza Mohamad Nor, Annuar Mohd Ramli, Nurul Nadia Ahmad   +3 more
doaj   +1 more source

Characteristics of Two Ground Grid Potentials After a Triggered Lightning Stroke

IEEE Access, 2020
It has been determined that the discharge of lightning current to ground through grounding grid results in high potential at the grounding grid and other nearby grounding grids, which is very destructive.
Xu Yan, Yijun Zhang, Shaodong Chen, Sai Du, Weitao Lyu, Lyuwen Chen   +5 more
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Effects of impulse polarity on grounding systems

, 2020
In earlier paper, experimental results of 1-rod, 2-rod and 3-rod electrodes under high magnitude impulse currents of positive polarity were presented. In the paper, it was noticed that lower reduction of impulse resistance from its steady-state ground ...
Ahmad, Nurul Nadia, Abdul Ali, Abdul Wali, Abdul Wali Abdul Ali, Nurul Nadia Ahmad, Mohamad Nor, Normiza, Normiza Mohamad Nor   +5 more
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Investigations on the Performance of Grounding Device with Spike Rods (GDSR) with the Effects of Soil Resistivity and Configurations

Energies, 2020
In a recently published work, the characteristics of a new grounding device with spike rods (GDSR) with various arrangements of ground electrodes under high magnitude impulse currents (up to 16 kA), was investigated.
Abdul Wali Abdul Ali, Nurul Nadia Ahmad, Normiza Mohamad Nor, Nur Farahi Idris, Farhan Hanaffi   +4 more
doaj   +1 more source