China Railways HXD1

HXD1
HXD1 0004
Power type	Electric
Builder	Zhuzhou Electric Locomotive Company Limited , Siemens
Build date	2006-[1]
Total produced	180
UIC classification	2 (Bo'Bo')
Gauge	1,435 mm (4 ft 8 1⁄2 in)
Wheel diameter	1.250 m (4 ft 1.2 in)[2]
Wheelbase	bogie centre distance 9 m (29 ft 6 in)[2] bogie axle distance 2.8 m (9 ft 2 in)[3]
Length	35.222 m (115 ft 6.7 in)[3]
Width	3.247 m (10 ft 7.8 in)[2]
Locomotive weight	184 t (181 long tons; 203 short tons) (200t*)[2]
Electric system	25kV 50Hz AC[2]
Current collection method	Pantograph
Top speed	120 km/h (75 mph)[2]
Power output	9.6 MW (12,900 hp) (continuous)[2]
Tractive effort	700 kN (160,000 lbf) (μ =0.39) (760kN*)[2]
Notes
*when ballasted to 25t axleload for extra traction

The China Railways HXD1 also sometimes known as the DJ4^{[note 1]} is an eight axle high power heavy freight twin unit locomotive of axle configuration Bo'Bo'+Bo'Bo'.

The 7.34billion Yuan order for 180 locomotives was given in 2004, with the first locomotive manufactured by November 2006.^[1][4] Production of the locomotives class is now complete.^{[5][clarification needed][when?]}

Background and design

The HXD1 locomotives are based on the Siemens' Eurosprinter derived design of the China Railways DJ1 locomotive.^[2]

Construction of the locomotives was carried out by Zhuzhou Electric Locomotive Company Limited. The locomotive consists of two identical single cab Bo'Bo' units coupled together, the main locomotive body is load bearing, electric traction equipment uses a AC-DC-AC transmission chain, with the traction motors being three phase asynchronous devices. The electrical inverter for traction motor power control is an IGBT type. The traction control system is a Siemens SIBA32^[6], multiple working of two locomotives, and Locotrol distributed traction control system.^[7]

The machines have a pneumatic disc brake, as well as being able to brake regeneratively. Standard operating speed is 70 km/h (43 mph)^[7] or 65 km/h (40 mph) when ballasted to 25t axleload.^[3]

Operations

The locomotives were built for heavy coal trains; in particular the Datong to Qinhuangdao line (Daqin Railway)^[4]. On the Daqin line the locomotives can operate in pairs both doubled headed and distributed along the train.^[8]

See also

• List of locomotives in China

References

1. ^ ^{a b} 全球最大功率交流传动电力机车在湖南株洲下线 The world's largest power AC electric locomotives off the assembly line in Zhuzhou, Hunan , 9 November 2006 , news.xinhuanet.com
2. ^ ^{a b c d e f g h i} More mega locos join the Chinese coal traction fleet , 1 August 2007 , www.railwaygazette.com
3. ^ ^{a b c} HXD1型大功率交流传动电力机车 (HXD1-type high-power AC drive electric locomotives) , CSR Zhuzhou Electric Locomotive Co., Ltd. , www.gofront.com
4. ^ ^{a b} Locomotives Reference List Electric Double Locomotive HXd1 for Chinese Railways CR www.transportation.siemens.com
5. ^ "Introduction: CSR Zhuzhou Electric Locomotive Co., Ltd.". www.gofront.com. http://www.gofront.com/english/qyjs/qyjs.htm. "ZELC has completed the contract of high power HXD1 AC drive 8-axle (9600kW) electric locomotives awarded by Ministry of Railway, China, which was obtained together with Siemens in the end of 2004" 
6. ^ SIBAS 32 The control system for all rail vehicles , (about) , www.siemens.pl
7. ^ ^{a b} HXD1 High Power AC Drive Electric Locomotive CSR Zhuzhou Electric Locomotive Co., Ltd. , www.gofront.com
8. ^ Beijing and Jixi, March 2010 www.railwaysofchina.com

Notes

1. ^ Both the HXD1 and HXD2 double unit locomotives were designated DJ4, the HXD2 units being disambiguated DJ4-6000. Source: HXD2 electric locomotive news.chineserailways.com

External links

• como Complete mobility , Issue 02 , June 2009 , pp. 14–26 , via www.mobility.siemens.com (information on early 21st century developments in rail transport in China, including HXD1)
• RAILWAY TECHNOLOGY : HXD1 , brief description , documents.epfl.ch