Results 191 to 200 of about 20,285 (246)

On the Question of the Formation of the Lightning Current

Физика плазмы, 2023
The bipolar lightning development model was used to study the dependence of the potential that is transported to the earth by the downward leader channel. It was shown that this parameter strongly depends on the starting position of the lightning and on the trajectories of formation of its bipolar leaders.
N. L. Aleksandrov, A. A. Ponomarev, A. A. Syssoev, D. I. Iudin   +3 more
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Lightning Currents in Arresters at Stations

Transactions of the American Institute of Electrical Engineers, 1940
A large number of people in several organizations have contributed to make an investigation of this type possible and to correlate the data in suitable form for presentation. The authors wish to express their appreciation to the Ohio Power Company, the Appalachian Electric Power Company, the Atlantic City Electric Company, and the Indiana and Michigan ...
I. W. Gross, W. A. McMorris
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New instruments for recording lightning currents

Electrical Engineering, 1940
IN the early days of lightning investigations surge voltages on transmission lines were measured by a relatively crude device consisting of a number of parallel gaps with different spacings. The maximum gap broken down, which was indicated by markings on a thin piece of paper placed within the gap, was a measure of the voltage. Peters,1 by applying the
C. F. Wagner, G. D. McCann
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Self-powered lightning current sensor

2016 IEEE SENSORS, 2016
In this paper, a self-powered lightning current sensor based on the electromagnetic induction principle has been proposed. The sensor whose signal coil and power harvesting coil are nested in lightning channel (such as grounding wire of lightning arresters) can be triggered and powered by the lighting current.
Disheng Wang, Lin Du 0008, Shiying Wang, Liman Ran   +3 more
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Lightning Currents in 132-Kv Lines

Transactions of the American Institute of Electrical Engineers, 1937
Data pertaining to lightning currents actually measured in tower structures, counterpoises, and ground wires on 132-kv lines during 1933-36 are presented in this paper. It is concluded that stroke currents rarely exceed 150,000 amperes, although 220,000 amperes has been indicated, and that currents as high as 60,000 amperes measured in the overhead ...
Philip Sporn, I. W. Gross
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Observation of lightning current in the soil by rocket-triggered lightning

2016 33rd International Conference on Lightning Protection (ICLP), 2016
In recent years, there has been a significant increase in the damage to electrical and electronic devices owing to lightning surge-induced overvoltage/overcurrent, in Japan. In particular, the lightning surge overcurrent that flows through grounding lines can cause serious damage to electronic equipment.
Shinji Yasui, Tetsuya Takuwa, Daisuke Morishima, Shinichi Sumi, Takeshi Morimoto, Kenji Horii   +5 more
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Lightning current derivatives approximation

2016 24th International Conference on Software, Telecommunications and Computer Networks (SoftCOM), 2016
An analytically extended function (AEFD) for modelling of lightning currents first derivatives is presented in this paper. Among other mathematical functions, Heidler's function is often used for approximating lightning currents of the first positive, first and subsequent negative strokes as given in the IEC 62305 Standard.
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Lightning channel's influence on currents and electromagnetic fields in a building struck by lightning

IEEE International Symposium on Electromagnetic Compatibility, 2002
A procedure is presented for the analysis of the electromagnetic field inside a structure which receives a direct lightning stroke. The lightning protection system is schematized as an equivalent wire model. The electromagnetic field inside the structure is computed by means of a digital computation code based upon the moments method in the framework ...
S. Cristina, ORLANDI, Antonio
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Lightning Current Observations in Buried Cable

Bell System Technical Journal, 1949
Results are given of observations of lightning currents, voltages, and charges in a buried cable over most of three lightning seasons. These are compared with theoretical expectations. Data regarding the incidence of lightning strokes to ground, as observed with automatic recording equipment, are also reported, together with comparisons with similar ...
H. M. Trueblood, E. D. Sunde
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