Title :
Tests on the breakdown of air at elevated temperatures in non-uniform electric fields
Author :
Allen, N.L. ; Lam, D. S K ; Greaves, D.A.
Author_Institution :
Sch. of Electr. Eng. & Electron., Univ. of Manchester Inst. of Sci. & Technol., UK
fDate :
11/1/2000 12:00:00 AM
Abstract :
Sparkover voltage characteristics have been obtained using a 20 cm rod-plane gap at temperatures between 294 and 770 K. Lightning and slow-front impulse and alternating voltages have been applied; pre-breakdown corona has also been investigated under impulse voltages. The nature of the sparkover characteristics depends strongly on the type and polarity of the applied voltage. These are discussed in terms of the changes in relative air density with temperature and the relationship to the recommendations of IEC 60-1 for the adjustment of sparkover measurements to changes in atmospheric conditions
Keywords :
air; corona; electric breakdown; electric field effects; lightning; plasma temperature; sparks; 20 cm; 200 to 900 K; IEC 60-1; air; alternating voltages; applied voltage; atmospheric conditions; breakdown; elevated temperatures; impulse voltages; lightning; lightning impulse; nonuniform electric fields; polarity; pre-breakdown corona; relative air density; rod-plane gap; slow front impulse; slow-front impulse; sparkover measurements; sparkover voltage characteristics;
Journal_Title :
Science, Measurement and Technology, IEE Proceedings -
DOI :
10.1049/ip-smt:20000700
