Four voltages are combined on the same line: 380 kV, 220 kV, 65 kV (between Chamoson and Aproz) and 132 kV CFF (between Chamoson and St-Léonard).
Raggrupperà 4 tensioni sullo stesso supporto: 380 kV, 220 kV, 65 kV (fra Chamoson e Aproz) e 132 kV CFF (fra Chamoson e St-Léonard).