RENFE Class 311


RENFE 311.001 prototype (1986)
Type and origin
Power type Diesel-electric
Builder 311.0 prototype: M.T.M., Ateinsa, Babcock & Wilcox[1]
311.1: Alstom (Meinfesa), Siemens, Bazán[2]
Build date prototype 1985
Total produced 61[2]
UIC class Bo'Bo'[1]
Gauge 1,668 mm (5 ft 5 2132 in)[1]
Wheel diameter 1,100 mm (43.31 in)[2]
Length 14.200 m (46 ft 7.1 in)[1]
Width 2.900 m (9 ft 6.17 in)[1]
Height 4.250 m (13 ft 11.32 in)[1]
Loco weight 80 t (79 long tons; 88 short tons)[1]
Prime mover MTU 396 B V TC 13[2]
Loco brake 311.0 prototype: Vacuum[1]
311.1: Pneumatic, rheostatic[1]
Performance figures
Maximum speed 90 km/h (56 mph)[1]
Power output 1,065 hp (794 kW)[2]
Tractive effort 255 kN (57,000 lbf) @ 7.5 km/h (4.7 mph)[2]
Operators RENFE
Locale Spain

The RENFE Class 311 is a class of four axle Bo'Bo' diesel electric shunting and light freight locomotives.

Background and design

The prototype locomotive 311.001 was designed by M.T.M. (Barcelona), Ateinsa (Madrid) and Babcock & Wilcox (Bilbao); the project was led by the Instituto Nacional de Industria.[note 1]

The prototype locomotive led to an order of 60 units, which were assigned to the subclass 311.1, and numbered 311.101 to 311.160.

The transmission system uses 4 axle hung pinion drive three-phase asynchronous motors powered by a three phase alternator driven by a MTU engine partly license built by Bazán. Siemens supplied Sibas-16 microprocessor engine control systems.[3]

The prototype locomotive was initially painted orange with a white stripe, the series production were all given a red/silver livery; standard for RENFE shunting locomotives. Some units have subsequently received a more recent white/grey renfe livery. As of 2010 most of the units are operated by RENFE Mercancías, about one third have been assigned to the infrastructure company Adif.[4]


The locomotives were a success for the Spanish engineering industry, and the design formed the basis of a number of locomotive types exported from the Meinfesa factory: the SBB Am 841 (40 units 1994), the GA DE900 locomotives for Mexico, Israel and Egypt (35 units, 1997-2000) and the SNCF Class BB 60000 (175 units, 2004-8).[5]

See also


  1. The locomotives are sometimes known as Mabi from the initials of the companies involved in the design of the locomotive.


RENFE 311.140 at Pamplona (July 2005)
  1. 1 2 3 4 5 6 7 8 9 10 Jorge Sanz Mongay. "Serie 311". (in Spanish).
  2. 1 2 3 4 5 6 7 "Caract. técnicas - Material motor - Renfe 311". (in Spanish).
  3. "Las modernas locomotoras de maniobras de Renfe de la Serie 311". (in Spanish).
  4. "ADIF - 311". (in Spanish).
  5. "References Vossloh Rail Vehicles". Vossloh Rail Vehicles (Vossloh Espana). Shunting Locomotives.


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