Prototype: Electric locomotive Rh 2143 of the Austrian Federal Railways. The locomotives were built between 1964 and 1977 and operated on non electrified main and branchlines especially in the Eastern part of Austria. They operated in front of passenger as well as freight trains. A total of 77 locomotives were delivered by the Simmering-Graz-Pauker Werke to the ÖBB. The driving unit is a SGP 8 cylinder four cycle engine with a power output of 1115 kW. The locomotive is equipped with a train heating generator as well as with a supplemental Diesel power engine for the air pressure. The transmission of power is provided by a hydrodynamic transmission from Voith.