China Railways DJ1

DJ1
DJ1-0003
Power type	Electric
Builder	Siemens / Zhuzhou Electric Locomotive Works[1]
Build date	1999-2003[2]
Total produced	20[1]
UIC classification	2(Bo'Bo')
Gauge	1435 mm[1]
Wheel diameter	1250m[3]
Wheelbase	bogie axle distance 2.800m[3] bogie centre distance 9.000m[3]
Length	35.232m[3]
Width	3.300m[3]
Locomotive weight	2x92t (2x100t*)[1]
Electric system	25kV/50Hz AC[1]
Current collection method	Pantograph
Top speed	120 km/h (75 mph)[1]
Power output	2x3.2 MW (4,300 hp) (at wheel)[1] 6.4 MW (8,600 hp)
Tractive effort	starting 700 kN (160,000 lbf) [760 kN (170,000 lbf)*][1]
Career	China Railways
Notes
* 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.

Background and description

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.^[1]

The electrical components in the locomotive are based upon Siemens' EuroSprinter design (second generation using water-cooled GTO inverters).^[1] The traction motors are asynchronous AC type, and are nose suspended on the axle, regenerative electric braking is possible with a braking force of ~460kN, and a electric braking power of 6.4MW, overall efficiency of the machine is more than 85%.^[2]

The locomotives were used to haul coal trains on the Daqin line^[1].

Production of the locomotive ended in 2004^[2].

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

1. ^ ^{a b c d e f g h i j k} Electric Locomotives Siemens, Electric Double Locomotive DJ1 for China Railways CR, p.36, webdoc.siemens.it
2. ^ ^{a b c} Siemens Traction Equipment Ltd., Zhuzhou, p.5 and pp.8-9, cn.siemens.com
3. ^ ^{a b c d e} Heavy Freight Double-Locomotive DJ1 for Chinese Railways (CR) www.siemens.cz

External links

• DJ1 交流传动电力机车 (DJ1 AC drive electric locomotives), Zhuzhou Electric Locomotive Works, www.gofront.com
• Image: Two DJ1 units, coal train via www.railpictures.net