Analysis of sphere-rod gaps under standard lightning and switching impulse voltages

Author

Gourgoulis, D.E. ; Mikropoulos, P.N. ; Stassinopoulos, C.A.

Author_Institution

Dept. of Electr. & Comput. Eng., Aristotelian Univ. of Thessaloniki, Greece

Volume

144

Issue

1

fYear

1997

fDate

1/1/1997 12:00:00 AM

Firstpage

11

Lastpage

16

Abstract

The relative low cost of sphere-rod gaps compared to sphere gaps makes it worthwhile to study the breakdown mechanisms of the former, if only to find whether they could be used for calibrating or measuring purposes, Having this in mind, the influence of impulse shape, gap spacing and humidity on the sparkover voltage of sphere-rod gaps always in comparison with sphere gaps has been investigated under standard impulse waveshapes. It is found that breakdown is influenced by humidity, waveshape and especially by polarity. With these factors in view, the breakdown mechanism and the feasibility of using them as measuring substandards is discussed

Keywords

air gaps; electric breakdown; lightning; measurement standards; switching; transients; voltage measurement; 2.5 to 15 cm; breakdown mechanisms; breakdown probability curves; gap spacing; humidity influence; impulse shape; measuring substandards; polarity; sparkover voltage; sphere-rod gaps; standard lightning voltages; switching impulse voltages;

fLanguage

English

Journal_Title

Science, Measurement and Technology, IEE Proceedings -

Publisher

iet

ISSN

1350-2344

Type

jour

DOI

10.1049/ip-smt:19970715

Filename

575878