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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 tonnes (98 long tons; 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.^{[citation needed]}

See also

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

References

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

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