Electric field analysis of 132kv EPDM insulator and correlation with ageing features

Antonios Tzimas, Christos Zachariades, Simon M. Rowland

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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    A COMSOL multiphysics electric field analysis of an ethylene-propylene rubber (EPDM) insulator is presented. The 132kV insulator is an inverted post insulator that is taken from a jumper loop. It has been in service in a severely polluted environment for eight years. The insulator's surfaces are asymmetrically aged with organic dark deposits covering the insulator's surface, and with additional surface markings. The insulator has a manufacturing artifact, known as the mold line, which forms an elongated protrusion along the length of the insulator. This artifact is introduced into the COMSOL model to investigate its effect on the local electrical field. The reason for this study is that the area surrounding the mold line is lighter in color, with markings that suggest discharge activity. The regions of the localized field enhancements are identified and correlated with the ageing features, such as hydrophobicity loss, surface roughness and discoloration observed after eight years in service. A discussion whether the environment or the electric field are dominating the ageing process of the insulator is included. © 2013 IEEE.
    Original languageEnglish
    Title of host publication2013 IEEE Electrical Insulation Conference, EIC 2013|IEEE Electr. Insul. Conf., EIC
    Place of PublicationOttawa, ON, Canada
    Publication statusPublished - 2013
    Event31st Electrical Insulation Conference, EIC 2013 - Ottawa, ON
    Duration: 1 Jul 2013 → …


    Conference31st Electrical Insulation Conference, EIC 2013
    CityOttawa, ON
    Period1/07/13 → …


    • Ageing
    • Asymmetrical ageing
    • COMSOL multiphysics analysis
    • condition monitoring
    • mold line
    • outdoor insulators


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