Magne E Runde
Magne E Runde
Publications and responsibilities
SF6 - en av verdens verste klimagasser
Internal pressures and pressure gradients in mass-impregnated HVDC cables during current cycling
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...
Self-blast current interruption and adaption to medium voltage load current switching
Ablation-assisted current interruption is a candidate for improving interruption capability in medium voltage switchgear. In high voltage switchgear, ablation is utilized to achieve high pressures in self-blast circuit breakers. Self-blast switch technology adapted to medium voltage could represent...
Inside the aluminum contact spot
Ny viten gir skjøkabler økt overføringsevne
Ny viten gir sjøkabler økt overføringsevne
Comparison of Different Air Flow Concepts for a Medium Voltage Load Break Switch
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...
Cavities in mass-impregnated HVDC subsea cables studied by AC partial discharge measurements
Partial discharge measurements have been used for studying shrinkage voids in the insulation of mass-impregnated high voltage DC subsea power cables. Three 4.5-m long cable samples were subjected to ac partial discharge measurements at different ambient temperatures, both under isothermal...