China Railways HXD1
Encyclopedia
The China Railways HXD1 also sometimes known as the DJ4Both the HXD1 and HXD2
China Railways HXD2
The HXD2 locomotives are a series of related locomotive classes built by CNR Datong Electric Locomotive and Alstom. The locomotives designs are based on the Alstom Prima electric locomotives, and are a product of a cooperation agreement signed between the two companies in 2004...

 double unit locomotives were designated DJ4, the HXD2 units being disambiguated DJ4-6000. Source: HXD2 electric locomotive news.chineserailways.com
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. Production of the locomotives class is now complete.

Background and design

The HXD1 locomotives are based on the Siemens' Eurosprinter
EuroSprinter
The EuroSprinter family of electric locomotives is a modular concept of locomotives for the European market built by Siemens. The internal Siemens product name is ES 64, with ES for EuroSprinter and the number 64 indicating the 6,400 kW power at rail.Additional information is given in the name...

 derived design of the China Railways DJ1
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.-Background and description:...

 locomotive.

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, multiple working of two locomotives, and Locotrol
Locotrol
Locotrol is a product of GE Transportation Systems that permits railway locomotives to be distributed throughout the length of a train...

 distributed traction control system.

The machines have a pneumatic disc brake, as well as being able to brake regeneratively. Standard operating speed is 70 km/h (43.5 mph) or 65 km/h (40.4 mph) when ballasted to 25t axleload.

Operations

The locomotives were built for heavy coal trains; in particular the Datong
Datong
Datong is a prefecture-level city in northern Shanxi Province of North China, located a few hundred kilometres west by rail from Beijing with an elevation of...

 to Qinhuangdao
Qinhuangdao
Qinhuangdao is a port city in northeastern Hebei province of North China. It is about 300 km east of Beijing, on the Bohai Sea, the innermost gulf of the Yellow Sea....

 line (Daqin Railway
Daqin Railway
Daqin Railway , also known as the Daqin Line , is a 653 km coal-transport railway in north China. Its name is derived from its two terminal cities, Datong, a coal mining center in Shanxi province, and Qinhuangdao, of Hebei province, on the Bohai Sea.The railway also passes through the...

). On the Daqin line the locomotives can operate in pairs both doubled headed and distributed along the train.

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
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