Charge Accumulation in LDPE and XLPE Conditioned at 80oC under Reduced Pressure

Robert J. Fleming, Mogens Henriksen, Joachim T. Holbøll

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    The effects of thermal conditioning, under reduced pressure, on space accumulation in planar LDPE and XLPE samples under DC stress, have been investigated. The samples were conditioned prior to voltage application by being held at 80oC for 2-3 days in short circuit at rotary pump pressure. Some were then cooled to room temperature over a period of at least 6hr, still under rotary pump pressure and in short circuit, while others were cooled to room temperature in less than 1.5hr in the laboratory air. DC fields of 18kV/mm were then applied at room temperature, and space charge accumulation was monitored as a function of time using the PEA (Denmark) and LIPP (Australia) techniques. Conditioning did not prevent space charge accumulation in either the LDPE or XLPE samples.
    Original languageEnglish
    Title of host publication1997 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena
    Place of PublicationPistcataway
    PublisherIEEE
    Publication date1997
    Publication statusPublished - 1997
    Event1991 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena - Minneapolis, USA
    Duration: 1 Jan 1997 → …

    Conference

    Conference1991 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena
    CityMinneapolis, USA
    Period01/01/1997 → …

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