Browsing USN Open Archive by Author "Fjeld, Elin"
Now showing items 1-11 of 11
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Contact Resistance and Temperature Rise of Cable Connections in Cable Distribution Cabinets
Fjeld, Elin; Rondeel, Wilhelm G. J.; Sønsteby, Gunn Kristin; Bekken, Finn Werner; Eriksen, Thomas Ranvik (Conference lecture, 2020)Initiated by a number of fire accidents in the low voltage switchgear in cable distribution cabinets, investigations have been performed to identify the cause of these fires. The results indicate that the cable connection ... -
Emission Free Construction Site-Thermal Overloading of the Charging System
Akhlaq, Muhammad (Master thesis, 2022)In Norway, many municipalities set the target toward the emission-free construction site. Skagerak Energi also took a step toward this emission-free construction site by charging the construction machinery with the help ... -
Estimate the temperature rise of medium voltage metal enclosed switchgear by simplified heat transfer calculations
Fjeld, Elin; Rondeel, Wilhelm G. J.; Attar, Elham; Singh, Shailendra (Journal article; Peer reviewed, 2020)Electrical equipment will experience a rise in temperature during normal operation. During a development process, prototypes and laboratory tests will be required to make sure the temperature rises are within acceptable ... -
High current arc erosion on copper electrodes in air
Øyvang, Thomas; Fjeld, Elin; Rondeel, Wilhelm; Hagen, Svein Thore (Journal article; Peer reviewed, 2011)An arc fault inside metal enclosed switchgear will cause the pressure to rise and vaporization of electrode material may contribute to the pressure rise. An experimental study of high current arc erosion on copper electrodes ... -
Life Cycle Assessment of Mobile Batteries for Emission-Free Construction Sites
Khodabakhsh, Safa (Master thesis, 2023)Nowadays, due to increasing demand for energy and limited availability, there has been an increased focus on developing emission-free construction sites. To address this issue, life cycle assessment (LCA) is used as a ... -
Non-intrusive ultrasonic sound detection of internal arc fault in medium voltage switchgear
Tollefsen, Tonje (Master thesis, 2021)Arc fault protection is becoming ever more critical for all power systems to maintain the safety of personnel and reduce damage to expensive equipment. An internal arc fault is an unintentional event within an enclosed ... -
Small scale arc fault testing of medium voltage metal enclosed switchgear
Fjeld, Elin; Hagen, Svein Thore (Journal article; Peer reviewed, 2016-03-16)Internal arc fault tests are important for ensuring the safety of medium-voltage metal-enclosed switchgears. Since these tests are conducted at full scale, the costs of the test objects as well as the high-power laboratory ... -
Studentaktive Læringsformer for å Fremme Dyplæring i Høyspenningsteknikk
Fjeld, Elin; Tholin, Kristin Rydjord; Øhra, Mattias (Journal article, 2019)Denne studien baserer seg på perspektiver rundt dyplæring. Det søkes å vise hvordan mer tudentaktive læringsformer kan skape mere robuste læringspraksiser som igjen muliggjør dyplæring. Studien søker å vise at en slik ... -
Thermal capacity and loading assessment for 24 kV XLPE-insulated cables in air
Kwak, Hyeonyoung (Master thesis, 2021)Charging large battery packs requires high currents, especially for short-term charging of electric vehicles. The ohmic losses heats up power cables and is the limiting factor for the current capacity. However, the power ... -
Thermal Design of Future Medium Voltage Switchgear
Fjeld, Elin; Rondeel, Wilhelm; Vågsæther, Knut; Saxegaard, Magne; Skryten, Pål; Attar, Elham (Conference object; Peer reviewed, 2015)Air is a desirable alternative to SF6 in medium voltage (MV) switchgear. However, the thermal properties of air is poorer compared with SF6, and this paper presents a first step in the process of finding an optimized thermal ... -
Thermal overloading of MV metal enclosed switchgear
Gløsmyr, Cecilie Dortea (Master thesis, 2022)Going electric is an important step toward a more environmentally friendly world by reducing greenhouse gases. Some electrical devices might be able to withstand a short-term overloading, which for example can be used for ...