ON THE SURFACE-FLASHOVER PHENOMENA IN POLYMER INSULATORS IN VACUUM.

M. Akahane, Yoshimichi Ohki, D. Ito, K. Yahagi

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    Abstract

    The dc surface flashover phenomena in relatively high vacuum (10** minus **5-10** minus **7 torr) is studied using polyethylene samples. Based on the results of the investigator, the following possible discharge mechanism is proposed, First, electrons are emitted from the cathode-dielectric junction. These electrons then bombard the sample surface and the anode, thus detaching the physically adsorbed gases. The adsorbed gases increase the pressure locally, resulting in the generation of local flashover. This discharge mechanism explains the dielectric constant dependence, the thermal oxidation effect and the irradiation effect on the dc flashover phenomena in a qualitative manner.

    Original languageEnglish
    Pages (from-to)1-6
    Number of pages6
    JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
    Volume94
    Issue number1
    Publication statusPublished - 1974 Jan

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    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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