Electrode erosion and lifetime performance of a triggered, corona-stabilized switch in SF6, at a repetition rate of 1kHz

Koutsoubis, John M. and Thoma, Katerina and MacGregor, Scott J. (2016) Electrode erosion and lifetime performance of a triggered, corona-stabilized switch in SF6, at a repetition rate of 1kHz. IEEE Transactions on Dielectrics and Electrical Insulation, 23 (4). pp. 1985-1995. ISSN 1070-9878 (https://doi.org/10.1109/TDEI.2016.7556470)

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Abstract

This paper describes the work undertaken to investigate the electrode erosion and lifetime performance of an electrically triggered, corona stabilized (TCS) switch. The switch, which had a rod-plane geometry, was filled with SF6 at a pressure of 0.8 bar (1.0bar = 100kPa) absolute and was operated at a pulse repetition frequency (PRF) of 1kHz. The erosion rates of anode and cathode electrode materials such as elkonite (a copper tungsten composite), brass, aluminum and two types of stainless steel was measured, and their surfaces were studied optically, photographed and chemically analyzed. The erosion rate of the anode (rod) electrode materials ranged from 21.39 x 10-6 cm3C-1 for elkonite to 60.4 x 10-6 cm3C-1 for brass, whilst a cathode (trigger disc) erosion rate as high as 51.23 x 10-6 cm3C-1 for aluminum was measured. The lifetime of the TCS switch was experimentally determined for each of the electrode material tested, and was found to be inversely proportional to the erosion rate of the rod electrode. The electrode surface morphology and the gas-electrode compound distribution have also been evaluated to address the erosion mechanism in effect. Additionally, the influence of rod electrode surface conditions and gas deterioration has been investigated in respect to the performance and operational behavior of the TCS switch.

  • Item type:Article
    ID code:56417
    Dates:
    Date
    Event
    8 September 2016
    Published
    12 April 2016
    Accepted
    Notes:(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components 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:18 May 2016 13:06
    Last modified:08 Apr 2024 23:02
    URI:https://strathprints.strath.ac.uk/id/eprint/56417
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