• DocumentCode
    1105900
  • Title

    An SF6 autoexpansion breaker: the correlation between magnetic arc control and critical current

  • Author

    Bernard, G. ; Girard, A. ; Malkin, P. ; Scarpa, P.

  • Author_Institution
    Merlin Gerin, Grenoble, France
  • Volume
    5
  • Issue
    1
  • fYear
    1990
  • fDate
    1/1/1990 12:00:00 AM
  • Firstpage
    196
  • Lastpage
    201
  • Abstract
    It is possible to design SF6 autoexpansion breakers which are free from critical currents. In these devices, which combine arc rotation in a magnetic field and thermal expansion of gas, critical currents can effectively occur if these effects are incorrectly created and combined. An analytic and experimental method optimizing the current at which rotation should start is presented. The study of the gas flow then ensures coupling with expansion. These investigations lead to representation of a thermal time constant directly related to interrupting capacity
  • Keywords
    circuit breakers; gaseous insulation; sulphur compounds; SF6 autoexpansion breaker; arc rotation; critical current; gas flow; interrupting capacity; magnetic arc control; thermal time constant; Coils; Inductors; Magnetic fields; Threshold current;
  • fLanguage
    English
  • Journal_Title
    Power Delivery, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0885-8977
  • Type

    jour

  • DOI
    10.1109/61.107273
  • Filename
    107273
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1105900