China Railways DJ1
|Sources : 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
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.
The electrical components in the locomotive are based upon Siemens' EuroSprinter design (second generation using water-cooled GTO inverters). 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%.
3 of the units were manufactured by Siemens in Austria, the remaining 17 in China; the first locomotive was produced in 2001. The first china manufactured unit was produced in 2002. Production of the locomotive ended in 2004.
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.
- "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
- Heavy Freight Double-Locomotive DJ1 for Chinese Railways (CR) www.siemens.cz[dead link]
- "Electric locomotives : Reference List" (PDF), www.mobility.siemens.com, Siemens, Electric Double Locomotive DJ1 for China Railways CR, p.39
- "First roll out for China locomotive contract", Asia Pacific Rail, 1 July 2001
- Sino-foreign joint production of heavy-duty electric locomotives off the assembly line, Xinhua, 8 July 2002
- "交流传动电力机车 [DJ1 AC drive electric locomotives]", www.gofront.com, Zhuzhou Electric Locomotive Works, archived from the original on 6 January 2009
- Image: Two DJ1 units, coal train via www.railpictures.net
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