A Class of Hazardous Subsequent Lightning Strokes in Terms of Insulation Stress

Author

Visacro, Silverio ; De Mesquita, Claudia Rejane ; Dias, Rosilene Nietzsch ; Silveira, Fernando H. ; De Conti, Alberto

Author_Institution

Lightning Res. Center, Fed. Univ. of Minas Gerais (UFMG), Belo Horizonte, Brazil

Volume

54

Issue

5

fYear

2012

Firstpage

1028

Lastpage

1033

Abstract

Events of a class, consisting of the subsequent strokes of multiple-stroke flashes presenting the largest peak current, have features that make their effects very severe in terms of insulation stress, notably the combination of a relatively intense peak current and a very short front time. According to instrumented-tower measurements, their median peak current 27.2 kA is around 55% higher than that of the whole set of subsequent strokes and their median front time is around 0.7 μs. The frequency of such events is relatively significant since around 80% of lightning flashes are multiple-stroke flashes.

Keywords

insulation; lightning protection; poles and towers; hazardous subsequent lightning strokes; instrumented-tower measurements; insulation stress; lightning flashes; lightning protection; multiple-stroke flashes; Ash; Current measurement; Instruments; Insulation; Lightning; Poles and towers; Voltage control; Lightning; lightning parameters for engineering application; subsequent-stroke currents;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/TEMC.2012.2187339

Filename

6177657