The SNCF Class BB 7200 is a 1.5 kV DC electric locomotive. It is operated by the SNCF in France. The BB 7200 are part of the "Nez Cassé" family of locomotives. SNCF Class BB 15000 is the alternating current (AC) version. The the Class BB 22200 is a dual-voltage version. They are numbered to show that the DC and AC class make the dual-voltage locomotives (7200 + 15000 = 22200). Another similar model is the NS Class 1600. It is operated in the Netherlands. It is a DC locomotive based on the BB 7200.