Breakdown in compressed N-2 under impulse voltages

Ismailoglu H., Kalenderli O., Ozkaya M., Gonenc I.

66th Annual Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Minnesota, United States Of America, 19 - 22 October 1997, pp.604-607 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Minnesota
  • Country: United States Of America
  • Page Numbers: pp.604-607
  • Istanbul Technical University Affiliated: No


Breakdown strength of N-2 under standard lightning impulse voltages in non-uniform field was experimentally investigated. The experiments were carried out with sphere-plane electrode system with protrusion and without protrusion. The electrode gap spacing and the relative gas pressure were varied within the range of 5 mm to 25 mm and of 0 bar to 4 bars, respectively. At each pressure and gap spacing, impulse breakdown voltages for both negative and positive polarities were measured. The 50% breakdown values were obtained using the least squares. Breakdown voltage of N-2 increases either with an increasing gap spacing and/or with an increasing gas pressure.