 They are still the only dual powered electro-diesel locomotives in use by Transnet Freight Rail, capable of running either on electricity off the catenary or on diesel fuel alone.The 3 kV DC Class electro-diesel locomotive was designed for Spoornet by Consortium under the leadership of Siemens and was built by Union Carriage & Wagon (UCW) in Nigel, Transvaal.Fifty locomotives entered service between 1992 and 1994, numbered in the range from 38-001 to 38-050.