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 Prima is a family of railway diesel and electric locomotives built by Alstom. During the late 1990s, manufacture of the type had commenced; by 2008, Alstom had reportedly sold 1,750 Prima locomotives. In 2009, the second generation Prima II was lau ...

electric locomotives, and are a product of a cooperation agreement signed between the two companies in 2004. All locomotives are intended for heavy freight work, including coal trains on the Datong Qinhuangdao line (

Daqin Railway Daqin (; alternative transliterations include Tachin, Tai-Ch'in) is the ancient Chinese name for the Roman Empire or, depending on context, the Near East, especially Syria. It literally means "great Qin"; Qin () being the name of the founding d ...

). The original HXD2 locomotives are twin unit

Bo′Bo′+Bo′Bo′ B-B and Bo-Bo are the Association of American Railroads (AAR) and British classifications of wheel arrangement for railway locomotives with four axles in two individual bogies. They are equivalent to the B′B′ and Bo′Bo′ classifications in ...

vehicles whereas the HXD2B and HXD2C versions are single unit Co′Co′ machines. At the time of their construction the HXD2 and HXD2B locomotives were amongst the most powerful locomotives in the world. The HXD2C is similarly specified to the HXD2B but of reduced power, and with increased localisation of components for lower cost. The HXD2 was originally described as the DJ4-6000 class. Variants of the type were produced for railways other than China Railway: in 2010 Belarus state railways ordered a HXD2

twin unit A twin unit or twinset is a set of two railroad cars or locomotives which are permanently coupled and treated as if they were a single unit. A twinset of cars or coaches can also be called a twin car. In US passenger railroad parlance, twin u ...

locomotive variant ( BCG-1); and in 2012

Shenhua Group Shenhua Group Corporation Limited was a Chinese state-owned mining and energy company. Shenhua Group was founded in October 1995 under the auspices of the State Council of the People's Republic of China. It was the largest coal-producing compan ...

also ordered twin section locomotives. In 2012 CNR Datong announced a new sub-version of the HXD2 class, built using fully localised production; the HXD2-1000 series. In 2014 a new localised variant, in 2(Bo′Bo′) wheel arrangement and 9.6MW power, with axle load of 27tonnes (up to 30 tonnes on specialised line) was unveiled, designated HXD2F, and officially nicknamed ''超级大力士''.

Variants

HXD2

The locomotives are designed for heavy haul freight applications (up to train weights), and to be capable of multiple working of three locomotives. The design is also specified for temperatures down to . The locomotive is ballasted to a

axle load An axle or axletree is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle. In the former case, bearin ...

- a reduction to axle load with reduced starting tractive effort is optional. An (€350 million) order for 180 locomotives was placed (2005), of which the initial 12 would be made in France, then 24 supplied for assembly, the remainder being produced in China. The locomotives are used primarily for coal transportation, specifically on the Datong - Qinhuangdao railway line. The first China built locomotive was produced May 23, 2007. In 2010 the locomotives began to be used on coal trains from

Inner Mongolia Inner Mongolia, officially the Inner Mongolia Autonomous Region, is an autonomous region of the People's Republic of China. Its border includes most of the length of China's border with the country of Mongolia. Inner Mongolia also accounts for a ...

. ;Design The main structural component is an integrated welded steel main bean and floor, with load bearing side sills. The side walls are of corrugated metal, and the roof of the locomotive is removable. The structure is designed for loads of in tension and in compression. The couplers are designed for up to force. The drivers cabins are designed for single driver operation. Driver facilities include a separate air-conditioned/heated area with refrigerator, cooking and washing facilities, and seating and beds. The locomotives use asynchronous AC electric motor technology, which drives the axles by a nose suspended drive. The bogies are of welded steel construction, with tractive forces transmitted by a low mounted drawbar. The electrical system consists of a transformers based on

ABB Group ABB Ltd. is a Swedish- Swiss multinational corporation headquartered in Zürich, Switzerland. The company was formed in 1988 when Sweden's Allmänna Svenska Elektriska Aktiebolaget (ASEA) and Switzerland's Brown, Boveri & Cie merged to crea ...

products with 4 windings for electric traction power supply per transformer. Traction

inverter A power inverter, inverter or invertor is a power electronic device or circuitry that changes direct current (DC) to alternating current (AC). The resulting AC frequency obtained depends on the particular device employed. Inverters do the opp ...

s are IGBT semiconductor device based, and of the Alstom ''ONIX'' type - each traction motor has a separate inverter/rectifier electrical power system. Electrical power for auxiliary devices is supplied via IGBT converters powered from the same intermediate DC power supply used to power the traction motors. Computer control and monitoring systems are from the Alstom ''AGATE'' product range.

HXD2-1000

In August 2012 CNR Datong announced the production of a new variant of its twin section, 8 axle, 10MW freight locomotive using domestically produced traction and control systems; the first unit was numbered HXD2-1001. The two first units have corrugated sides, following ones have smooth sides.

HXD2-6000

From 2014 CNR Dalian delivered 40 HXD2 quite similar to series HXD2-1000.

HXD2-7000

From 2012 CNR Datong delivered 50 HXD2 quite similar to both first HXD2-1000 at the operator Shenhua Mining. Minor differences in cabin form. HXD20021 20180210.jpg, HXD20021 at Chawu Railway Station HXD20045 Qinhuangdao Railway Station 20090810.jpg, HXD20045 at Qinhuangdao Railway Station HXD2-1076.jpg, HXD21076 (1000 Series) HXD2 1442 and 1479 at Luotuoxian (20171005103310).jpg, HXD2 (1000 Series)

HXD2F

In April 2014 two indigenous two-unit (Bo′Bo′)-(Bo′Bo′) locomotives were unveiled by CNR Datong, nicknamed “超级大力士” (''trans.'' 'Super hercules" or "Super strongman"). The locomotives had an axle load of for higher tractive effort, with power output of .Sources: * * *

HXD2G

In November 2015 two indigenous two-unit (Bo′Bo′)-(Bo′Bo′) locomotives were unveiled by CNR Datong. The locomotives had an axle load of for higher speed, with continuous power output of . It is designed for 200 km/h, but first used until 160 km/h.

Related orders

In October 2010 Belorusskaja Železnaja Doroga ordered 12 units of a derived variant of the HXD2 two-section locomotive, to be designated BCG-1. In 2012 CNR Datong supplied the Chinese mining operation,

, with two , twin section, , eight-axle locomotives, with traction equipment supplied by Bombardier. The locomotive type is derived from technology used in the 'Harmony' (HXD) series, and has been named ''"超级大力士"'',Sources: * * * (literal: "Super Strongman").

Notes

References

{{DEFAULTSORT:China Railways Hxd2 Electric locomotives of China CNR Datong Electric Locomotive Co. locomotives Alstom Prima electric locomotives 25 kV AC locomotives Standard gauge locomotives of China Bo′Bo′+Bo′Bo′ locomotives