Light emission and subsequent tree inception due to polarity reversal of the local field in polymeric insulation

DOIResolve DOI: http://doi.org/10.1109/CEIDP.1988.26328
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TypeArticle
Proceedings titleAnnual Report, Conference on Electrical Insulation and Dielectric Phenomena 1988
Conference1988 annual report, Conference on Electrical Insulation and Dielectric Phenomena, October 16-20, 1988, Ottawa, Ontario, Canada
Pages173179; # of pages: 7
AbstractThe authors describe the treeing characteristics of normal and degassed low-density polyethylene under AC, DC, and half-rectified AC voltages. By individually controlling the amplitudes of the positive and negative half-cycles of the AC voltage, it is shown that the polarity reversal of the local field in the polymer plays a crucial role for light emission and subsequent tree inception. If light is not emitted, then treeing does not occur, because it is impossible for the unipolar injected charge to gain sufficient energy to cause impact ionization or break bonds of the polymer chain. The injection of electrons and holes and their recombination at luminescent centers gives rise to light having spectra in the visible and the UV (ultraviolet) ranges. The UV light photodegrades the polymer and leads to the formation of an electrical tree
Publication date
LanguageEnglish
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
Peer reviewedNo
NRC number1708
NPARC number8896928
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Record identifier31897934-3659-4ce9-a1e9-f856025acc97
Record created2009-04-22
Record modified2016-05-09
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