Results 241 to 250 of about 5,250 (287)
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Impulse Behavior of Ground Electrodes
IEEE Power Engineering Review, 1983The state of knowledge on the behavior of ground wire electrodes under impulse currents due to lightning strokes is outlined. The influence of ground characteristics, size of buried conductors, and current wave-shape and intensity are discussed.
Carlo Mazzetti, Giuseppe Veca
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Modelling of a Grounding Electrode
IEEE Transactions on Power Apparatus and Systems, 1973An experimental modelling technique of a grounding electrode in non-homogenous soil is presented, and the experimental results obtained are compared with theoretical figures computed from known analytical methods.(1,2) This technique is suitable for dc or ac testing of a grounding electrode.
Dinkar Mukhedkar +2 more
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Lightning surge response of ground electrodes
IEEE Transactions on Power Delivery, 1989Experimental and analytical evidence shows that lighning surge currents ionize the air in the soil. This ionization process tends to increase the contact area of the electrode with surrounding material. The larger area results in lower resistance and less voltage stress per unit current.
William A. Chisholm, Wasyl Janischewskyj
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Corrosion assessment of a ground electrode in contact with ground enhancing compounds
2010 30th International Conference on Lightning Protection (ICLP), 2010Although a ground enhancing compound of a grounding system main purpose is to discharge electrical current to ground, however, it overlooks the fact that it can suffer chemical degradation due to the contact of the ground electrode with the compound, as the latter is not a chemically inert material.
Galvan, Arturo +2 more
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Impulse characterization of ground electrodes
2014 International Conference on Lightning Protection (ICLP), 2014In this paper, an analysis of the experimental results on the impulse behaviour of grounding electrodes is presented. The parameters used for analyzing transient performance are reviewed and differences highlighted based on test data. The analysis is extended to (i) quantify the effect of impulse shape, (ii) quantify the effect of electrode length ...
N. Harid +4 more
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Characteristics of Grounding Impedances of Carbon Compound Grounding Electrodes
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2011This paper presents characteristics of frequency-dependent grounding impedance and transient grounding impedance for the carbon compound grounding electrode used in the installation of computerized electronic equipment and lightning protection system.
Kang-Soo Lee, Bok-Hee Lee
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Analysis of the Ground Impedance of Ground Grids Combined with the Carbon Ground Electrodes
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, 2013This paper deals with the frequency-dependent ground impedance of ground grids combined with the carbon ground electrodes. Ground grids are generally valid for multipurpose grounding systems as well as lightning protection systems. The carbon ground electrodes may be supplementarily used to reduce the high frequency ground impedance and to improve the ...
Bok-Hee Lee +5 more
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Analysis of Grounding Performance of Tower Grounding Electrodes in Elevated Terrain
IEEE Transactions on Power DeliveryYihua Dan, Zhanlong Zhang, Siqi Bu
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The American Journal of Cardiology, 1993
Abstract Accurate electrocardiographic (ECG) interpretation by computer or manually requires that the electrocardiogram be recorded with all electrodes in proper positions. All possible electrode placement errors involving the active limb electrodes (right and left arm, and left leg) have been described.
W K, Haisty +3 more
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Abstract Accurate electrocardiographic (ECG) interpretation by computer or manually requires that the electrocardiogram be recorded with all electrodes in proper positions. All possible electrode placement errors involving the active limb electrodes (right and left arm, and left leg) have been described.
W K, Haisty +3 more
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Ground-Free ECG Recording with Two Electrodes
IEEE Transactions on Biomedical Engineering, 1980ECG recordings normally use three electrodes?two for the differential inputs of the ECG amplifier and the third for ground. We analyze those situations where the ground electrode can be eliminated. We propose a model for the source of electrical interference and determine various parameter values.
N V, Thakor, J G, Webster
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