As well as in Suvereto as in Codrongianos, the converters are situated in halls with a length of 38 metres, a width of 15 metres and a height of 11 metres. SACOI 3 It is planned to replace the existing scheme with a bipolar system with a transmission rate of 400 MW called SACOI 3. It will also operate with a voltage of 200 kV. While the overhead lines can be used without modification, the underground and underwater cables have to be replaced for the higher transmission rate. Two new converters will also be built at the existing sites in Suvereto and Codrongianos. Sites Waypoints Italy Mainland Electrode Line on Italian Mainland Corsica Electrode Line in Corsica ( Start of underground cable) ( End of underground cable) ( Start of underground cable) ( End of underground cable) Sardinia Electrode Line in Sardinia See also SAPEI, the new HVDC interconnection between Sardinia and the Italian mainland. References External links https://web.archive.org/web/20041118012809/http://www.jce.it/newjce/contents/elettronica/cinescopio/200206/CIN6%20Chiama.pdf https://web.archive.org/web/20051115115248/http://www.transmission.bpa.gov/cigresc14/Compendium/SACOI.htm https://web.archive.org/web/20051115133446/http://www.transmission.bpa.gov/cigresc14/Compendium/Sacoi+Pictures.pdf http://www.openstreetmap.org/relation/3391794 https://www.progettodighe.it/gallery/albums/userpics/10156/SACOI.pdf https://www.terna.it/en-gb/sistemaelettrico/dialogoconicittadini/sacoi3ternaincontratoscanaesardegna.aspx#!#tab-2 SACOI 3 project ( in Italian) Video on construction of SACOI 1 Italy-Corsica-Sardinia Electric power infrastructure in Italy Electric power infrastructure in France Economy of Sardinia Corsica HVDC transmission lines France–Italy relations Energy infrastructure completed in 1968 Energy infrastructure completed in 1988 1968 establishments in Italy 1988 establishments in France