Traction substation

A traction substation, traction current converter plant, rectifier station or traction power substation (TPSS) is an electrical substation that converts electric power from the form provided by the electrical power industry or railway owned traction power network to an appropriate voltage, current type and frequency to supply trains, trams (streetcars) or trolleybuses with traction current. A traction power substation may also refer to a site that supplies a railway traction power network with power from the public electricity utility.

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