Original: They are a polycurrent version ( 1500 V DC and 25 kV 50 Hz AC ) of the BB 7200 and BB 15000 classesThe designation '' 22000 '' is in fact the sum of 7200 and 15000 , with which it shares the exterior appearance .
Simplified: The BB 22200 is a class of electric locomotives in service with the French railways SNCF , built by Alsthom between 1976-1986 .