The field enhancement factor of sand-blasted electrodes

Iain Wilson McAllister, Svend Vibholm (fratrådt)

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A sample of six sand-blasted electrodes has been subjected to both mechanical and electrical investigations. When the surfaces of a series of conductors are mechanically treated, the resultant microscopic surface geometries will be similar, but not identical. As a consequence of this spread in the geometric characteristics of the roughened surfaces, the m values associated with nominally identical conductors will also exhibit a scatter. The method, which is based on the detection of discharge onset in a gaseous medium at the surface in question, was used to investigate the scatter in a field enhancement factor m for a particular surface treatment. For the sample studied, the mean electric field enhancement factor was found to be 6.6. The mechanical surface parameters indicated a sand aging effect
Original languageEnglish
JournalI E E E International Symposium on Electrical Insulation. Conference Record
Pages (from-to)307-309
Publication statusPublished - 1992
Event1992 IEEE International Symposium on Electrical Insulation - Baltimore, MD, United States
Duration: 7 Jun 199210 Jun 1992


Conference1992 IEEE International Symposium on Electrical Insulation
CountryUnited States
CityBaltimore, MD
Internet address

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