How many volts is a high speed train?

High-speed-trains usually run on 25,000 volts alternating current (AC), but a few countries operate trains above 200km/h with other voltages, such as 15,000 volts AC in Germany, Austria and Switzerland. Some sections of high-speed lines in Italy and Russia use 3,000 volts AC.



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Railway electrification using alternating current (AC) at 15 kilovolts (kV) and 16.7 hertz (Hz) are used on transport railways in Germany, Austria, Switzerland, Sweden, and Norway.

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Electric trains generally draw power from AC overhead lines. Some DC lines do exist, but they are getting replaced by AC lines. Motors used (traction motors) are generally DC motors.

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Historically, the 110 V battery located in the main locomotive was the source of dc power for most electrical rail applications. This meant providing light to the carriages required running cables along the full train length.

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As you know 25kV is globally accepted voltage level for electric locomotives. Reasons to choose 25 KV instead of 240/415V is that for less voltage like 240V or 415V, flowing current increase to dangerously high value and counductor/Line could be burnt out.

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