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 type Electric Builder Siemens / Zhuzhou Electric Locomotive Works Build date 1999-2003[1] Total produced 20
Specifications Configuration: ​  • UIC 2(Bo'Bo') Gauge 1,435 mm (4 ft 8 ^1⁄2 in) standard gauge Wheel diameter 1,250 mm (49.21 in)[2] Wheelbase bogie axle distance 2,800 mm (9 ft 2 ^1⁄4 in)[2] bogie centre distance 9.000 m (29 ft 6 ^3⁄8 in)[2] Length 35.232 m (115 ft 7 ^1⁄8 in) 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 3,200 kW (4,300 hp) continuous (at wheel) 8,200 kW or 11,000 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]
Career Operators China 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 lb_f), 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

• List of locomotives in China
• China Railways HXD1 successor locomotive

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

External links

• "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