China Railways DJ1

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Type and origin
Power type Electric
Builder Siemens / Zhuzhou Electric Locomotive Works
Build date 1999-2003[1]
Total produced 20
 • UIC 2(Bo'Bo')
Gauge 1,435 mm (4 ft 8 12 in)
Wheel diameter 1,250 mm (49.21 in)[2]
Wheelbase bogie axle distance
2,800 mm (110.24 in)[2]
bogie centre distance
9.000 m (29 ft 6.3 in)[2]
Length 35.232 m (115 ft 7.1 in)[2]
Width 3,300 mm (129.92 in)[2]
Loco weight 2×92 t (91 long tons; 101 short tons) (2 × 100 t or 98 long tons or 110 short tons*)
Electric system/s 25 kV 50 Hz AC Catenary
Current pickup(s) Pantograph
Performance figures
Maximum speed 120 km/h (75 mph)
Power output 2 x 3.2 MW (4,300 hp) continuous (at wheel)
8,100 MW or 10,900,000 hp peak, 10min.[1]
Tractive effort starting 700 kN (160,000 lbf), *760 kN (170,000 lbf)
461 kN (104,000 lbf) @ 50 km/h (14 m/s)[1]
Operators China Railways
Sources :[3] except where noted
* Ballasted to 100t to improve traction

The China Railways DJ1 is a high power mainline electric freight locomotive built as a double locomotive unit of two nominally independent single cab units.

History and design[edit]

The locomotives are based on a technology transfer agreement between Siemens and Zhuzou Electric locomotive works (ZELW). The first three locomotives were built by Siemens in Austria, and the remaining 17 were built in China.[3]

The electrical components in the locomotive are based upon Siemens' EuroSprinter design (second generation using water-cooled GTO inverters).[3] The traction motors are asynchronous AC type, and are nose suspended on the axle, regenerative electric braking is possible with a braking force of approximately 460 kN (100,000 lbf), and an electric braking power of 6.4 MW (8,600 hp), overall efficiency of the machine is more than 85%.[1]

3 of the units were manufactured by Siemens in Austria, the remaining 17 in China; the first locomotive was produced in 2001.[4] The first china manufactured unit was produced in 2002.[5] Production of the locomotive ended in 2004.[1]

The locomotives were used to haul coal trains on the Daqin line.[3]

As more powerful locomotive models HXD1 and HXD2 entered Daqin line since 2006, the 20 DJ1s were allocated to Xi'an Railway Bureau to haul freight trains running between Baoji and Qinling.[citation needed]

See also[edit]


  1. ^ a b c d e "Siemens Traction Equipment Ltd., Zhuzhou" (PDF), (in English and Chinese), Siemens, pp. 5, pp.8–9, archived from the original (PDF) on 2013-09-21 
  2. ^ a b c d e Heavy Freight Double-Locomotive DJ1 for Chinese Railways (CR)[dead link]
  3. ^ a b c d "Electric locomotives : Reference List" (PDF),, Siemens, Electric Double Locomotive DJ1 for China Railways CR, p.39 
  4. ^ "First roll out for China locomotive contract", Asia Pacific Rail, 1 July 2001 
  5. ^ Sino-foreign joint production of heavy-duty electric locomotives off the assembly line, Xinhua, 8 July 2002 

External links[edit]