Traction current pylon

traction current lines with four systems (8 conductor cables), the two-level arrangement (4 conductor cables on each crossbar) is frequently used, except for traction current lines supplying high-speed railway lines are used. For these lines a three-level arrangement is used, in which the lowest cross bar has four conductor cables and each of the two highest cross bars have two conductor cables. The three-level arrangement is also used for traction current pylons with 6 electric circuits (12 conductor cables). For the supply of rapid-transit railways operated with alternating current, some overhead line