Blar i NTNU Open på forfatter "Jonsson, Erik"

Viser treff 1-5 av 5

    • Ageing of Technical Air and Technical Air with 7.5% C5-Fluoroketone by Free-Burning Arcs 

      Subhana, Arik; Støa-Aanensen, Nina Sasaki; Gammelsæter, Marte; Jonsson, Erik; Mauseth, Frank (Journal article; Peer reviewed, 2023)
      This paper reports on the effect of ageing by free-burning arcs in 7.5% C5-fluoroketone (C5-FK) with 92.5% technical air in comparison to that in technical air (80% N2, 20% O2) at 1.3bar absolute pressure. The gases are ...

    • 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, ...

    • Effect of Filling Pressure on Post-Arc Gap Recovery of N2 

      Abid, Fahim; Niayesh, Kaveh; Viken, Egil; Støa-Aanensen, Nina Sasaki; Jonsson, Erik; Meyer, Hans Kristian Hygen (Peer reviewed; Journal article, 2020)
      Experimental investigation of the effect of filling pressure on the post-arc dielectric recovery characteristics of nitrogen is reported in this paper. A half-cycle arc current duration of 540 μs followed by a 10 kV pulse ...

    • Experimental investigation on ablation-assisted current interruption - Experimental setup and preliminary results 

      Taxt, Henning; Niayesh, Kaveh; Jonsson, Erik; Runde, Magne (Chapter, 2016)
      This paper presents a flexible setup to investigate ablation-assisted interruption of load currents. The electrical test circuit is grid connected with a transformer secondary voltage from 6.9 kV to 24 kV. The applied ...

    • Load Current Interruption in Air for Medium Voltage Ratings 

      Jonsson, Erik (Doktoravhandlinger ved NTNU, 1503-8181; 2014:83, Doctoral thesis, 2014)
      Load break switches (LBSs) are common inside metal clad switchgear assemblies where space is a limiting factor. SF6 is usually used in this application due to its superior electrical characteristics, but is unfortunately ...