• Arc Voltage Characteristics in Ultrahigh-Pressure Nitrogen Including Supercritical Region 

      Abid, Fahim; Niayesh, Kaveh; Jonsson, Erik; Støa-Aanensen, Nina Sasaki; Runde, Magne (Journal article; Peer reviewed, 2017)
      A supercritical (SC) fluid is formed when both pressure and temperature of a fluid exceed the critical point, where distinct gas and liquid phases no longer exist. SC fluids demonstrate combined properties of gas and liquid, ...
    • Arc Voltage Distribution Measurement in Tube Constricted Ultrahigh-Pressure Nitrogen Arc 

      Abid, Fahim; Niayesh, Kaveh; Støa-Aanensen, Nina Sasaki (Chapter, 2020)
      This work contributes to the fundamental understanding of axial voltage distribution of the arc burning inside polytetrafluoroethylene (PTFE) tube at very high filling pressures of nitrogen. The arc peak current of 85 A ...
    • Characteristics of Switching Arc in Ultrahigh-pressure Nitrogen 

      Abid, Fahim (Doctoral thesis, 2020)
      An increasing number of wind farms and mining operations located far off the coast will lead to the development of offshore substations. To avoid the large costs associated with platforms and floaters, such a substation ...
    • Current interruption performance of ultrahigh-pressure nitrogen arc 

      Abid, Fahim; Niayesh, Kaveh; Espedal, Camilla; Støa-Aanensen, Nina Sasaki (Peer reviewed; Journal article, 2020)
      In this paper, the influence of gas filling pressure on the current interruption performance of different switch configurations with electric arcs burning in nitrogen has been experimentally investigated. A synthetic circuit ...
    • Nozzle Wear and Pressure Rise in Heating Volume of Self-blast Type Ultra-high Pressure Nitrogen Arc 

      Abid, Fahim; Niayesh, Kaveh; Støa-Aanensen, Nina Sasaki (Journal article; Peer reviewed, 2019)
      This paper reports on experiments with ultra-high pressure nitrogen arcs in a self-blast type switch design. The effect of filling pressure on nozzle mass loss and pressure-rise in the heating volume is investigated. An ...
    • Post-arc Dielectric Recovery Characteristics of Free-burning Ultrahigh-Pressure Nitrogen Arc 

      Abid, Fahim; Niayesh, Kaveh; Støa-Aanensen, Nina Sasaki (Chapter, 2019)
      This work contributes to the fundamental understanding of post-arc dielectric recovery characteristics of free-burning nitrogen arcs as a function of gas filling pressure. Arc peak current of 425 A at a frequency of 925 ...
    • Thermal interruption performance of ultrahigh-pressure free-burning nitrogen arc 

      Abid, Fahim; Niayesh, Kaveh; Thimmappa, Shashidhara Basavapura; Espedal, Camilla; Støa-Aanensen, Nina Sasaki (Chapter, 2020)
      In this paper, an experimental investigation of the thermal interruption performance of free-burning nitrogen arcs at 1 bar, 20 bar, and 40 bar filling pressures is reported. This work contributes to the fundamental ...
    • Ultrahigh-Pressure Nitrogen Arcs Burning Inside Cylindrical Tubes 

      Abid, Fahim; Niayesh, Kaveh; Støa-Aanensen, Nina Sasaki (Journal article; Peer reviewed, 2018)
      When the pressure and temperature of a fluid exceed a critical point, the fluid enters into the supercritical (SC) region. In this region, the physical properties are believed to be in favor of a good current interruption ...