The pantograph of the train is constantly rubbing on the electric line of the railway. Why doesn’t the line become thinner?
Hasan MahmudExpert
The pantograph of the train is constantly rubbing on the electric line of the railway. Why doesn’t the line become thinner?
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The wire that rubs should be replaced every few days. The wire is made of hard drawn copper to reduce corrosion. The part of the pentograph that rubs against the wire is made of a material that is self-absorbing so it has less wear. Graphite grease is used as a lubricant to reduce friction.
Overhead cables used for electric railway systems are generally made of materials that can withstand friction with pantographs.
For example, copper or aluminum wires are commonly used because they have good conductivity and are fairly strong. The pantograph is designed in a way that allows it to move smoothly along the overhead cable without damage. In addition, there are safety mechanisms that prevent excessive force from being applied to wire contacts. Regular maintenance of both overhead cables and pantographs is important to ensure that any damage is detected and rectified before it becomes a safety issue.