Title :
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
fDate :
1/1/1997 12:00:00 AM
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;
Journal_Title :
Science, Measurement and Technology, IEE Proceedings -
DOI :
10.1049/ip-smt:19970715
