China Railways DJ1

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.

DJ1
DJ1-0003
Type and origin
Power typeElectric
BuilderSiemens / Zhuzhou Electric Locomotive Works
Build date1999-2003[1]
Total produced20
Specifications
Configuration:
​
 • UIC2(Bo'Bo')
Gauge1,435 mm (4 ft 8 1⁄2 in)
Wheel diameter1,250 mm (49.21 in)[2]
Wheelbasebogie axle distance
2,800 mm (110.24 in)[2]
bogie centre distance
9.000 m (29 ft 6.3 in)[2]
Length35.232 m (115 ft 7.1 in)[2]
Width3,300 mm (129.92 in)[2]
Loco weight2×92 t (91 long tons; 101 short tons) (2 × 100 t or 98 long tons or 110 short tons*)
Electric system/s25 kV 50 Hz AC Catenary
Current pickup(s)Pantograph
Performance figures
Maximum speed120 km/h (75 mph)
Power output2 x 3,200 kW (4,300 hp) continuous (at wheel)
8,200 kW or 11,000 hp peak, 10min.[1]
Tractive effortstarting 700 kN (160,000 lbf), *760 kN (170,000 lbf)
461 kN (104,000 lbf) @ 50 km/h (14 m/s)[1]
Career
OperatorsChina Railway
Sources :[3] except where noted
* Ballasted to 100t to improve traction

History and design

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.

See also

References
  1. "Siemens Traction Equipment Ltd., Zhuzhou" (PDF), cn.siemens.com (in English and Chinese), Siemens, pp. 5, pp.8–9, archived from the original (PDF) on 2013-09-21
  2. Heavy Freight Double-Locomotive DJ1 for Chinese Railways (CR) www.siemens.cz
  3. "Electric locomotives : Reference List" (PDF), www.mobility.siemens.com, 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, archived from the original on 31 January 2016
  5. Sino-foreign joint production of heavy-duty electric locomotives off the assembly line, Xinhua, 8 July 2002


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