Class 19 is a class of electric locomotives operated by SNCB, the national railway of Belgium.During 1993 Class 21 locomotive 2130 was converted for use as a test bed for the development of future class 13.It was renumbered into Class 19 as 1901 for the testing program and was the only member of the class. The traction motors were replaced with asynchronous motors. It also gained a transformer that let it work under 25000 volts, 50 Hz AC and French signalling and train protection systems.