Developing test methods for interfacial ageing in composite insulators

P. D. Bastidas, S. M. Rowland

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

    279 Downloads (Pure)


    High voltage insulation systems consist of a combination of different insulating materials, exposed to multiple stresses during operation. Outdoor composite insulators used in transmission lines are typically made of two solid polymeric materials bonded together to form the insulator. Work reported here contributes to the evaluation of degradation within internal interfaces by developing tests to investigate interfacial tracking, with a view to replicating the tracking phenomena seen within composite insulators in service. The present paper highlights high voltage tests on dielectric interfaces with needle electrodes generating local high fields to initiate tracking. FEA has been used to design an experiment with controlled electric field magnitudes over a 1 m sample. Moreover, information from monitoring partial discharges and surface temperature is used to understand the inception and propagation of tracking activity within the structure.
    Original languageEnglish
    Title of host publicationhost publication
    Number of pages4
    Publication statusPublished - 2015
    EventConference on Electrical Insulation and Dielectric Phenomena - Des Moines
    Duration: 1 Jan 1824 → …


    ConferenceConference on Electrical Insulation and Dielectric Phenomena
    CityDes Moines
    Period1/01/24 → …


    • interface; interfacial; partial discharges; tracking; composite insulator; needle; FEA


    Dive into the research topics of 'Developing test methods for interfacial ageing in composite insulators'. Together they form a unique fingerprint.

    Cite this