Why are the train’s overhead cables positioned to make a zigzag, rather than straight line? The metal structure on the roof of the tram, the pantograph, rubs against the cable as the train moves forward. If the cable was in a straight line, it would rub the same point on the pantograph, which would begin to fray. But if the cable is in a zigzag, the rubbing happens evenly across the top of the pantograph, and the pantograph wears down less quickly. Sometimes innovation isn’t about grand reinvention, but about tiny design choices that quietly keep entire systems running smoothly. Video Credit Paul Clayton
To distribute the wear alongside the length of the Carbon rod. Making this component able to support more wear cycles
To be even the panto strip
In addition, this approach would facilitate heat dissipation generated by friction, thereby mitigating the rate of rubbing.
A smart engineer figured that out.
Which one preferred safety or cost savings
True intelligence is understanding the simple things that keep systems running smoothly — like preventive maintenance and proper line désaxement
Overhead line is positioned in this way to protect the pantograph from getting rip apart (damaged)if the cable can stay in one position.
Lead Training Instructor - Crosslinx Transit Solutions, Eglinton Crosstown
3wTo add to this. Each rod is a carbon insert to avoid damage to the OCS. Carbon wears. The zig zag cause even wear on the carbon.