SNCF Class BB 7200 SNCF Class BB 7200 The SNCF Class BB 7200 is a 1.5 kV DC electric locomotive operated by the SNCF in France. It is the DC version of the 'Nez Cassé' family of locomotives. SNCF Class BB 15000 is the AC version while the Class BB 22200 is a dual-voltage version. They are numbered to show that the DC and AC class numbers add up to the dual-voltage locomotive class number (7200 + 15000 = 22200). Another relative is the NS Class 1600 operated in the Netherlands, a DC locomotive based on the BB 7200. 7209, 7210, 7308 and 7348
SNCF Class BB 26000 simplicity of equipment, and price. Two locomotives SNCF BB 20011 and 20012 were used to develop and test the dual voltage traction system, microprocessor control systems and auxiliary motors, BB 20012 was used to develop and test the pneumatic and electrical braking system. The Paris-based industrial design group MBD Design contributed to the design of the locomotive. 264 of the class were ordered by SNCF, only 234 were built, the last 30 of the order were instead built as a new triple voltage design capable of also operating on 3 kV DC; these used asynchronous electric motors and became the