To main content

Erik Roger Jonsson

Research Scientist

Erik Roger Jonsson

Research Scientist

Erik Roger Jonsson
Phone: 450 10 212
Email:
Department: Electric Power Technology
Office: Trondheim

Publications and responsibilities

Publication
https://www.sintef.no/en/publications/publication/1930873/

To develop cost-efficient subsea switchgear for large sea depths, the extinction of arcs under high filling pressures must be understood. In this work, arc-extinction experiments have been performed with a puffer-like contact configuration using nitrogen at different filling pressures as the...

Publication
https://www.sintef.no/en/publications/publication/1915878/

Thermal expansion and contraction of the impregnation oil (the “mass”) in mass-impregnated non-draining HVDC cables cause the internal pressure to vary greatly during load changes. Pressure drops after load turn-off is a concern since formation of shrinkage cavities may reduce the dielectric...

Year 2021
Type Academic article
Publication
https://www.sintef.no/en/publications/publication/1812951/

The internal pressures in the insulation of two 5-m long pieces of a state-of-the art mass-impregnated non-draining subsea cable have been measured under load current cycling at ambient temperatures ranging from 3 to 37 °C. Thermal expansion of the mass gives in some cases rather extreme internal...

Publication
https://www.sintef.no/en/publications/publication/1822021/

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 with a rise rate of 150 V/μs is applied across the contact gap. The pulse is...

Authors Fahim Abid Kaveh Niayesh Egil Viken Nina Sasaki Støa-Aanensen Erik Roger Jonsson Hans Kristian Hygen Meyer
Year 2020
Type Academic article
Publication
https://www.sintef.no/en/publications/publication/1690876/

The research and development work towards a compact SF6-free load break switch for the medium voltage range has led to several design proposals. The interruption capability of three different nozzle and gas flow concepts with atmospheric air as the interrupting medium is compared and assessed. The...

Year 2019
Type Academic article
Publication
https://www.sintef.no/en/publications/publication/1617515/

This paper focuses on the arc voltage measurements of electrical arcs burning inside cylindrical tubes in nitrogen at different filling pressures from atmospheric and up to 80 bar. To investigate the effect of ablation, both nonablating ceramic tubes (alumina) and ablating...

Year 2018
Type Chapter
Publication
https://www.sintef.no/en/publications/publication/1528706/

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, which make them interesting to investigate them as an arc extinction medium...

Year 2017
Type Academic article
Publication
https://www.sintef.no/en/publications/publication/1475813/

One type test requirement for medium voltage load break switches is to interrupt 100 consecutive "mainly active loads". A puffer-type switch with axial-blown arc has been tested according to the 630 A/24 kV ratings. The nozzle and contact wear were measured regularly to investigate design...

Year 2017
Type Academic article