SNCF Class BB 27300 the number carried on the locomotive is prefixed with the number 8, to denote the unit as belonging to the Île-de-France division of SNCF. The first locomotives entered service in 2006 on suburban trains from Paris Montparnasse railway station. Current deployment sees a total of 25 locomotives operating services from Paris-Montparnasse on trains to Dreux, Mantes-la-Jolie and Rambouillet. At Montparnasse they have displaced older SNCF Class BB 8500 and BB 25500 locomotives. A further 42 locomotives operate from Paris Saint-Lazare railway station on trains to Poissy, Mantes-la-Jolie, Pontoise, Gisors, and Ermont Eaubonne. At Saint-Lazare BB 8500 and BB 17000 locomotives
SNCF Class BB 20004 SNCF Class BB 20004 The SNCF class BB 20004 locomotive was a dual-voltage test-bed locomotive transformed from the damaged BB16540 in 1959. After the end of its test period in 1969 it was reinstated with its original equipment under its original number BB16540. SNCF had already experimented with three other dual-voltage locomotives in the 1950s, but these were all rebuilt from a DC locomotive and could only deliver their full power under 25 kV. Power output under 1.5 kV was reduced to 10% of the full power which is nearly negligible. This was however no real problem, as these locomotives