Back سكة حديد مكهربة Arabic Železniční napájecí soustava Czech Bahnstrom German Railway electrification English Fervoja elektra sistemo Esperanto Sistema de electrificación ferroviaria Spanish سامانه ریل برقی Persian Système d'électrification ferroviaire French Eletrificazion FUR חשמול מסילות רכבת HE
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. Building their wires and other infrastructure is expensive, however.