Results 291 to 300 of about 1,180,561 (320)

Grounding/earthing electrode studies. 2

Proceedings of Industrial and Commercial Power Systems Conference, 2002
The paper details the effort to determine the adequacy of various methods of grounding/earthing electrodes installed in the alkaline, highly mineralized soil of the Las Vegas, Nevada area The grounding electrode testing program outlined has been prepared to address a number of questions relating to grounding [earthing] electrodes and soil conditions in
R.S. Howard, D.W. Zipse
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Grounding electrodes and grounding devices. Regulatory requirements

Автоматика, связь, информатика
Одной из основных проблем при проектировании заземляющих устройств (ЗУ) в грунтах с высоким удельным сопротивлением является создание низкоомного заземляющего устройства. В последнее время широкое распространение получили так называемые активные (химические) заземляющие электроды, обеспечивающие искусственное снижение удельного сопротивления грунта в ...
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Transient Ground Impedances According to Shapes of Grounding Electrodes

Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2006
This paper presents the transient behaviors of grounding system impedance against lightning impulse currents. The dynamic characteristics of the deeply driven ground rod and grounding grid subjected to the impulse current were investigated. The transient ground impedance strongly depends on the configuration and size of grounding electrodes and the ...
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Nonuniform Characteristics of a Horizontal Grounding Electrode

IEEE Transactions on Power Delivery, 2007
This paper has investigated the nonuniform characteristics of a counterpoise based on the frequency-dependence of R, L, C, and G and propagation parameters identified from measured results of transient voltages and currents on the counterpoise. It becomes clear that the characteristic impedance is significantly length-dependent (i.e non-uniform, at a ...
Arbind Kumar Mishra, Akihiro Ametani, Naoto Nagaoka, Shigemitsu Okabe   +3 more
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Calculation of Impulse Grounding Resistance of Extended Grounding Electrode

2013
In order to calculate the impulse grounding resistance of extended grounding electrode accurately, this paper introduces a method for computing the impulse grounding resistance based on the spark discharge characteristic of the earth, using a nonlinear differential circuit model. The relation curves of impulse grounding resistance with the current peak
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Research of Electromagnetic Flowmeter with Grounding Electrode

Advanced Materials Research, 2013
Grounding electrode electromagnetic flowmeter can reduce the loss of the measurement signal,and the conductivity lower medium can be measured if the area of the grounding electrode was increased. However, if the grounding electrode area is increased, the measurement signal will be reduced.
Song Gao, Bin Li, Shi Yi Yin
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Measurement of chemical ground electrode performance

2012 6th Asia-Pacific Conference on Environmental Electromagnetics (CEEM), 2012
We can reduce the grounding resistance of grounding object by reducing the resistivity of the soil, increasing the size of the area of ground, selecting the appropriate shape of the grounding (depth of the vertical ground) and increasing the number of vertical ground, etc. However, when the spot area is limited and soil resistivity is high, traditional
null Tang Zhaosheng, null Gao Cheng, null Zhao Zhongyi, null Shi Zhenhua, null Li Yanxin   +4 more
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A message from the ground electrode

Muscle & Nerve, 2016
Lawrence R, Robinson, Michael, Christie, Sanjeev, Nandedkar   +2 more
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A Comparison of Concrete Encased Grounding Electrodes to Driven Ground Rods

IEEE Transactions on Industry and General Applications, 1970
An experimental study was made to compare the efficacy of concrete encased grounding electrodes to that of driven ground rods for grounding residential and small commercial electric services. This study extended over 14 months and included a very wet winter and a dry summer.
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A Method for Grounding Resistance Calculation of the Vertical Grounding Electrode

SSRN Electronic Journal, 2022
Hye yong Kwon, Yong min Kil, Sunghyok Kim   +2 more
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