Altéo
| MI 2N "Altéo" (Class Z 1500) | |
|---|---|
A refurbished MI 2N "Altéo" at Boissy-Saint-Léger on the RER A line. | |
| In service | 6 June 1997–present |
| Manufacturers | GEC Alsthom and ANF |
| Family name | MI 2N, X'Trapolis |
| Constructed | 1995–2005 |
| Entered service | 6 June 1997 |
| Refurbished | 2019–2021 (expected) |
| Number in service | 43 trainsets (215 cars) |
| Formation | 5 cars per trainset (R+M+M+M+R) |
| Fleet numbers | Z 1501/2 - Z 1585/6 |
| Operators | RATP, SNCF |
| Depots |
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| Line served | |
| Specifications | |
| Car body construction | Stainless steel |
| Train length | 112 m (367 ft 5 in) |
| Car length | 22 m (72 ft 2 in) |
| Width | 2.9 m (9 ft 6 in) |
| Height | 4.32 m (14 ft 2 in) |
| Doors | 2 × 3 per car |
| Maximum speed | 120 km/h (75 mph) |
| Weight | 288 t (283 long tons; 317 short tons) |
| Traction system | GEC Alstom GTO CSI |
| Traction motors | 12 × 325 kW (436 hp) 4 FXA 3561 asynchronous, 550 V, force ventilated |
| Power output | 3,900 kW (5,230 hp) |
| Tractive effort | 350 kN |
| Acceleration | 1.15 m/s2 (3.8 ft/s2) |
| Deceleration |
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| Power supply | 380V/50Hz |
| Electric systems | |
| Current collection | Pantograph (type AX 25) |
| UIC classification | 2′2′+Bo′Bo′+Bo′Bo′+Bo′Bo′+2′2′ |
| Braking systems | Regenerative, disc and electrodynamic Eddy current brake |
| Safety system | SACEM |
| Coupling system | Scharfenberg type |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
The MI 2N "Altéo" (French: Matériel d'Interconnexion à 2 Niveaux, lit. 'two-level interconnection rolling stock'), also designated Class Z 1500, is a double-deck, dual-voltage electric multiple unit (EMU) operated on RER A, part of the Réseau Express Régional (RER), a hybrid suburban commuter and rapid transit system serving Paris and the surrounding Île-de-France region.
The MI 2N "Altéo" is the version of the MI 2N series developed for the RATP Group. It closely resembles the SNCF Class Z 22500 (MI 2N "Éole") operated by SNCF, although the two variants differ in their motorization and interior layout.
A total of 43 five-car trainsets were built by a consortium of Alstom (then GEC Alsthom) and Bombardier. Final assembly took place at Alstom's facility in Valenciennes and Bombardier's plant in Crespin between 1995 and 2005. The first unit entered service in 1996.
The development of the MI 2N was driven by the need to increase capacity on RER A, one of the busiest rail lines in the world. Each trainset can accommodate up to 2,600 passengers, significantly more than the approximately 1,887 passengers carried by the single-deck trains previously in use. Due to the success of the MI 2N, RATP later ordered 140 MI 09 trainsets, an updated version of the design, from the same Alstom–Bombardier consortium.