The high-voltage journey from overhead wires to moving wheels

Technology · Published 30 October 2026 Swipe more like this →

In short: Modern electric locomotives are marvels of power management. This video breaks down the complex engineering required to convert 25kV electricity into controlled motion, explaining how massive amounts of energy reach the motors safely.

The process begins with a pantograph collecting 25kV electricity from overhead lines. Because this voltage is too high for direct use in traction motors, it must be stepped down through heavy-duty transformers located on the locomotive.

From there, the power undergoes several stages of conversion before reaching the 3-phase AC traction motors that provide the actual pulling force. The video explores these intricate mechanical and electrical functions to show how modern locomotives differ from older models.

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