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RATP Class Z 1500 "Altéo" is a type of double-decker, dual-voltage electric multiple units operated on the French RER A line. These trains have been built by GEC Alstom and ANF (Bombardier France). The Altéo is also known as the RATP version of the MI 2N.
MI 2N RATP Altéo looks very similar to SNCF Class Z 22500 trains, but many differences exist between these models, such as motorization and design of inner spaces.
Description
As dual-voltage units, Altéos are able to operate on 1500 V DC or 25 kv AC electrical networks, because this is the case on the RER A line, which uses the two networks (RFF/SNCF from Cergy-le-Haut and Poissy to Nanterre-Préfecture - 25kv AC, RATP from Nanterre-Préfecture to Marne-la-Vallée, Boissy-Saint-Léger and Saint-Germain-en-Laye - 1500v DC).
Altéos made their commercial debut on June 6, 1997. 43 trains or 215 cars was built for the RER A line.