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.

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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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