China Railways HXD1

The HXD1 (Chinese: 和谐1型电力机车) (also known as the DJ4) is an eight axle high power heavy freight twin unit 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.

HXD1
和谐1型电力机车
HXD1-0026
Type and origin
Power typeElectric
BuilderCSR Zhuzhou Electric Locomotive, Siemens
Build date2006-2012
Total produced271
Specifications
Configuration:
​
 • UIC2 (Bo'Bo')
Gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
Wheel diameter1.250 m (49.21 in)
Wheelbasebogie centre distance 9 m
(29 ft 6+3⁄8 in)
bogie axle distance 2.8 m
(9 ft 2+1⁄4 in)
Length35.222 m (115 ft 6+3⁄4 in)
Width3.247 m (10 ft 7+7⁄8 in)
Loco weight184 t (181 long tons; 203 short tons) (200 t or 200 long tons or 220 short tons)
Electric system/s25 kV 50 Hz AC Catenary
Current pickup(s)Pantograph
Loco brakePneumatic and dynamic
Performance figures
Maximum speed120 km/h (75 mph)
Power output9.6 MW (12,900 hp) (continuous)
Tractive effortmax. 700 kN (160,000 lbf) (μ =0.39) (760 kN or 170,000 lbf)
continuous
494 kN (111,000 lbf) @70 km/h (43 mph)
BrakeforceDynamic:
(9.6 MW or 12,900 hp maximum)
max.461 kN (104,000 lbf)
continuous 461 to 288 kN (104,000 to 65,000 lbf) @75 to 120 km/h (47 to 75 mph)
  1. when ballasted to 25 t axleload for extra traction

The 7.34 billion Yuan order for 180 locomotives was given in 2004, with the first locomotive manufactured by November 2006. 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 (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 the parent holding company of Shenhua Group. 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.

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