The EV 1/2 was built to test electric operation on a circuit track. It was supposed to provide information on wear and tear, partly remotely controlled, in continuous operation 20 hours a day. It was composed of two parts, each with two axles, and only received three nose-suspended traction motors ex works. However, the fourth traction motor was supplied and installed after testing when the locomotive came to the Hamburg Port Railway. In the Reichsbahn it became E 73 03 and was decommissioned in 1932. 