A Overhead Lines are the system that connects two junctions of the grid. It is formed by the power conductors that transfer electricity, by guard wires that protect the conductors against voltage surges having atmospheric origins and by the pylons supporting conductors and guard wires. Lines can be single or double circuit if they are built with one or two groups of conductors, respectively. Available in 33 KV, 22 KV, 11 KV, LT and AB Cable.