Railway electrification system

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Electric locomotives under the wires in Sweden
Dual electrification; both overhead wire and third rail for different trains

A railway electrification system supplies electrical energy to railway locomotives and multiple units so that they can operate without having an on-board prime mover. Their main advantages are high energy efficiency and low operating cost. They are expensive to build, however.

Power supply[change | change source]

Electricity may be sent to the train in different ways. Different countries use different systems. The most widely used systems are:

Related pages[change | change source]