Pantograph, Locomotive Wiki

A pantograph is a device for collecting an electrical current to power an electric locomotive or electric multiple unit. The system is employed to make contact with an electrified overhead wire (cable). Pantographs come in all shapes and sizes depending on the speed of the locomotive or train set, power requirements, power supply systems etc. The basic parts of a pantograph is a lower arm(s) that pivot against the roof, of a carriage/loco, and is attached to upper arm(s) that is in-turn attached

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