Results 201 to 210 of about 20,285 (246)

Lightning currents in field and laboratory

Electrical Engineering, 1935
A review of available data on the magnitude and effects of lightning stroke currents, supplemented by laboratory experiments to check these effects, is presented here-with. Maximum currents of 150,000 to 200,000 amperes having durations of from 40 to 100 microseconds are indicated.
openaire   +1 more source

Corona envelopes and lightning currents

Journal of Geophysical Research: Atmospheres, 1989
Laboratory results on coronas and considerations of fundamental electrostatics are used to study the corona envelope around the lightning channel. Calculations predict that immediately after a return stroke, a corona current of the order 2 kA flows for less than a millisecond, that between steps of a stepped leader corona draws a current of about 3 kA,
S. J. Heckman, E. R. Williams
openaire   +1 more source

The Detection of Continuing Current in Lightning Using the Geostationary Lightning Mapper

Journal of Geophysical Research: Atmospheres, 2022
AbstractLightning with continuing current may have current durations that last for hundreds of milliseconds, resulting in continuous optical emission that coincides with the uninterrupted current flow. The space‐based Geostationary Lightning Mapper (GLM) is an optical sensor that allows for the detection of continuous optical emission.
Sarah I. Fairman, Phillip M. Bitzer
openaire   +1 more source

Current Waveforms for Lightning Simulation

IEEE Transactions on Electromagnetic Compatibility, 2012
From a survey of the literature on lightning characteristics, we present and discuss our recommendations for the median (50%) and severe (1%) values of the salient parameters of lightning current in both positive and negative cloud-to-ground discharges.
William R. Gamerota, Jean O. Elismé, Martin A. Uman, Vladimir A. Rakov   +3 more
openaire   +1 more source

Magnitudes of Lightning Currents

Nature, 1943
THE magnitudes of the total peak currents in lightning flashes have been over-estimated hitherto, due to the assumption made as to the relationship between the peak currents in individual discharge paths and the total peak current in any one flash.
openaire   +1 more source

The Measurement of Lightning Currents in Direct Strokes

Transactions of the American Institute of Electrical Engineers, 1944
The magnitude and wave shape of the discharge currents in 46 direct strokes have been measured during a five-year period at 25 direct-stroke stations on structures ranging in height from 75 to 585 feet. Measurements have been made with instruments capable of recording the wave front and tail of the high-current peaks and the low-magnitude continuing ...
openaire   +1 more source

Calculation of lightning current parameters

IEEE Transactions on Power Delivery, 1999
The new expression of the lightning current at the striking point is analyzed. The basic four channel-base lightning current quantities are assumed to be known: current peak value, current rise-time, maximum of the current steepness and the charge transfer at the striking point.
F. Heidler, J.M. Cvetic, B.V. Stanic
openaire   +1 more source

Analysis on the Lightning Current Model

Advanced Materials Research, 2012
Through the analysis of characteristic of lightning currents, this paper expounded the lightning current wave-form and the primary parameters of it. The previous lightning current models contain only two parameters, wave tail time constant and the peak current value, which is imperfection.
Ying Wang, Wei He, Zhen Zhu Zhou, Chun Dan Zhu   +3 more
openaire   +1 more source

Conducting Lightning Current

1993
When the stepped leader stroke of a large-magnitude lightning flash reaches striking distance above a building or other targeted structure, the stage is set for the transfer of a huge mass of electrical energy. The entire trip from thundercell to earth takes place in microseconds. This places a large burden on the conductors that must convey the charge
openaire   +1 more source

Early phases of lightning currents

2010 Asia-Pacific International Symposium on Electromagnetic Compatibility, 2010
The patterns of current waves of negative downward lightning strokes measured at the base of a short instrumented tower are discussed. The features of the current waveforms are commented specifically in relation to the early phase preceding the flow of the return current.
Visacro Silverio, Murta Vale Maria Helena, Teixeira Andre   +2 more
openaire   +1 more source