Light rail systems use electrical power from overhead wires to provide traction power to the light rail vehicles. The rails, sometimes in conjunction with supplemental negative return cables, act as the return conductor to the negative terminal of the rectifiers. Therefore, the electrical properties of the rails and tracks require special consideration. To obtain good conductivity for the track as a whole, a rail system must have a low resistance not only for reasons of economy but also for safety. This requires a low voltage drop in the rails over the length of the track structure.
Wednesday, August 8, 2018
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