Energinet needs to refurbish the existing converter transformers on Skagerrak 3 in station Tjele. Skagerrak 3 HVDC connection was delivered by ABB in 1993. The AC, DC, and neutral bushings on the converter transformers n…
eed to be replaced/retrofitted with SF6-free or gel-type composite bushings. Flanges, gaskets, and seals needs to be exchanged on the bushings and conservator. Additionally, accessories such as valves, new gas-relay, new thermometers, new pressure relays on transformers and tap changers, new oil lev
el indicators, including new cabling for all former mentioned items, and exchange of rubber bag in the conservator needs to be exchanged. Information can be obtained from the limited documentation on site, copying of documentation is not pe