Southern Energy Ring Project (Anillo Energético del Sur), Bolivia March 27, 2018 | Latin America Project Update The Southern Energy Ring Project includes a 327-km, 230 kV transmission line interconnecting the Tarija, Las Carreras (Chuquisaca), Torre Huayco, Litio, Llipi and Salar (Potosí) substations. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password