This is the first ±800kV UHV DC transmission line in Brazil and the fourth in the world. It was inaugurated in 2020 in the state of Pará and encompass Research and Engineering activities (Surveying and Engineering).
TL3 (Transmission Line) was part of Lot 1 of the ±800kV UHV transmission project for the third phase of the Belo Monte Hydroelectric Power Plant, developed by State Grid, crossing the states of Goiás, Maranhão, and Tocantins. The project involved the contracting of engineering services.