Corona propagation and charge deposition on a PTFE surface

Author

Allen, N.L. ; Faircloth, D.C.

Author_Institution

Dept. of Electr. Eng. & Electron., Univ. of Manchester Inst. of Sci. & Technol., UK

Volume

10

Issue

2

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

295

Lastpage

304

Abstract

A description is given of some properties of the corona discharge when propagating over a cylindrical polytetrafluoroethylene insulator surface placed along the axis of a rod-plane electrode arrangement. A scanning electrostatic probe has been used to measure the density of charge deposited on the surface; it is shown that the total net deposited charge is small compared with the total charge injected into the gap. The velocity of propagation has been measured. Effects of preceding coronas on succeeding ones and the nature of deposited charge after breakdown are described. Discussion is given in terms of electron lifetimes and attachment and photoemission processes.

Keywords

charge measurement; corona; electrodes; electron attachment; electrostatic devices; photoemission; polymer insulators; probes; PTFE surface; attachment processes; charge density measurement; charge deposition; corona discharge; corona propagation; cylindrical polytetrafluoroethylene insulator surface; electron lifetimes; photoemission processes; propagation velocity measurement; rod-plane electrode arrangement; scanning electrostatic probe; total net deposited charge; Charge measurement; Corona; Current measurement; Density measurement; Electrodes; Electrostatic measurements; Insulation; Probes; Surface discharges; Velocity measurement;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2003.1194114

Filename

1194114