Investigation of impulsive breakdown of interfaces formed by ester insulating liquids and soild dielectrics

Williamson, C. and Timoshkin, I. and MacGregor, S. and Wilson, M. P. and Given, M. J. and Sinclair, M. and Jones, A.; (2020) Investigation of impulsive breakdown of interfaces formed by ester insulating liquids and soild dielectrics. In: 2019 IEEE Pulsed Power & Plasma Science (PPPS). IEEE, Piscataway, N.J.. ISBN 9781538679692 (https://doi.org/10.1109/PPPS34859.2019.9009766)

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Abstract

Due to the comparable dielectric behaviours, and significant enhancements in terms of environmental and safety performance, ester fluids are seen as a viable replacement for naphthenic liquids for use within insulating applications. In order to increase the adoption of ester liquids, and widen possible industrial applications, more extensive substantiation of their dielectric characteristics is required; particularly in how these dielectric liquids behave when exposed to impulse voltages. Furthermore, there is a lack of published work on how the breakdown properties of these liquids are altered when operating as part of a liquid-polymer insulation system. The present work details experiments conducted using impulse voltages of negative polarity to investigate the breakdown parameters (breakdown voltage and time to breakdown) of interfaces formed by dielectric liquids and a selection of polymer dielectrics. Samples of Nylon 66, Polymethylmethacrylate (PMMA), and Polyvinylidene difluoride (PVDF) were tested with: a synthetic ester, MIDEL 7131; a natural ester, Envirotemp FR3; and a naphthenic liquid, Shell Diala S4 ZX (used for benchmarking). Experimental results from this work show that, under the studied test conditions, the solid-liquid interfaces formed by the selected solid dielectrics and ester fluids exhibit comparable dielectric strengths to those formed with the naphthenic oil under investigation.

ORCID iDs

Williamson, C., Timoshkin, I. ORCID logoORCID: https://orcid.org/0000-0002-0380-9003, MacGregor, S. ORCID logoORCID: https://orcid.org/0000-0002-0808-585X, Wilson, M. P. ORCID logoORCID: https://orcid.org/0000-0003-3088-8541, Given, M. J. ORCID logoORCID: https://orcid.org/0000-0002-6354-2486, Sinclair, M. and Jones, A.;
  • Item type:Book Section
    ID code:82781
    Dates:
    Date
    Event
    27 February 2020
    Published
    29 June 2019
    Accepted
    Notes:© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:14 Oct 2022 12:37
    Last modified:11 Nov 2024 15:31
    URI:https://strathprints.strath.ac.uk/id/eprint/82781
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