The China Railways HXD1 (also known as the DJ4) is an eight axle high power heavy freight
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 un ...
locomotive of axle configuration Bo'Bo'+Bo'Bo'. Both the HXD1 and
HXD2 double unit locomotives were designated DJ4, the HXD2 units being disambiguated DJ4-6000.
The 7.34 billion Yuan order for 180 locomotives was given in 2004, with the first locomotive manufactured by November 2006.
[全球最大功率交流传动电力机车在湖南株洲下线](_blank)
The world's largest power AC electric locomotives off the assembly line in Zhuzhou, Hunan, 9 November 2006, ''news.xinhuanet.com''[Locomotives Reference List](_blank)
Electric Double Locomotive HXD1 for Chinese Railways CR ''www.transportation.siemens.com'' Production of the 180 locomotives in the class took place between 2006 and 2008.
A second batch of 40 was delivered between 2009 and 2010.
In 2012 CSR began testing of a revised version of the locomotive, built by using higher levels of domestically sourced equipment. 50 units were delivered (1001 - 1050). Another unit (6001) was built at the end of 2012 by CSR Ziyang using Zhuzhou plans.
In 2013, CSR delivered 2 3xBo'Bo' to
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 ...
(14.4 MW), directly derived from "normal" HXD1, but with a modernized driver cab. The same operator ordered 8 2xBo'Bo' in the first quarter 2013. These locomotives are dubbed the "Shenhua" Series.
In 2020, CRRC produced a 6xBo'Bo' for
China Energy Investment
China Energy Investment Corporation, more commonly known as China Energy (), is a state-owned mining and energy company administrated by the SASAC of the State Council of the People's Republic of China.
History
On August 28, 2017, SASAC announce ...
the parent holding company of
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 ...
. With a power output of 28.8 MW it is regarded as the worlds most powerful multi-segment electric locomotive. These locomotives are dubbed the "Shenhua 24" Series.
Background and design
The HXD1 locomotives are based on the Siemens'
EuroSprinter derived design of the
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.
History and design
The locomotives are based on a technology transfer agreement between ...
locomotive.
Construction of the locomotives was carried out by
Zhuzhou Electric Locomotive Company Limited
CRRC Zhuzhou Locomotive Co., Ltd. is one of the electric locomotive manufacturers in China. It is one of the subsidiaries of CRRC.
History Predecessor
Zhuzhou Electric Locomotive Works was founded in 1936.
CRRC Zhuzhou Locomotive Co., Ltd.
...
. Most variants of the locomotive consists of two identical single cab Bo'Bo' units coupled together, the main locomotive body is load bearing, electric traction equipment uses an 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
An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily used as an electronic switch, which, as it was developed, came to combine high efficiency and fast switching. It consists of four alternating lay ...
type. The traction control system is a Siemens SIBA32, units can also be operated in multiple using the
Locotrol distributed traction control system.
The locomotive has a pneumatic disc brake, as well as being able to brake regeneratively. Standard operating speed is
or when ballasted to 25 t axleload.
Operations
The locomotives were built for heavy coal trains; in particular the
Datong
Datong is a prefecture-level city in northern Shanxi Province in the People's Republic of China. It is located in the Datong Basin at an elevation of and borders Inner Mongolia to the north and west and Hebei to the east. As of the 2020 cens ...
to
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 dyna ...
).
On the Daqin line the twin unit locomotives typically operate in pairs and triplets, both double headed and distributed along the train.
HXD10151 20180210.jpg, HXD1 at Datong–Qinhuangdao railway
HXD10016 20180210.jpg, On the Daqin line the HXD1, both double headed and distributed along the train.
巡道工出品 Photo by Xundaogong Cycling G210 road in Suide Town - panoramio (10).jpg, HXD1 (1000 Series) at Suide Town
HXD1型7004号神八电力机车.jpg, HXD1-7004 "Shenhua"(神华号)
See also
*
List of locomotives in China
References
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)
brief description, ''documents.epfl.ch''
{{DEFAULTSORT:China Railways Hxd1
HXD1
Zhuzhou locomotives
25 kV AC locomotives
Railway locomotives introduced in 2006
Standard gauge locomotives of China
