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

Volume

147

Issue

6

fYear

2000

fDate

11/1/2000 12:00:00 AM

Firstpage

291

Lastpage

295

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;

fLanguage

English

Journal_Title

Science, Measurement and Technology, IEE Proceedings -

Publisher

iet

ISSN

1350-2344

Type

jour

DOI

10.1049/ip-smt:20000700

Filename

899978