Mobile substations are fully equipped, factory assembled and tested, ready to use, electrical HV or MV substations mounted on semi-trailers. They include HV & MV switchgears, control and protection, auxiliaries, earthling and required gantry cables.

Among the important features of these units are their rapid integration into the network and the ability to relocate them across various places in a very short time. Mobile substations are increasingly becoming an effective tool for improving operational flexibility and reliability.