CR HXD1

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The HXD1 (Chinese: 和谐1型电力机车) (also known as the DJ4) is a Chinese heavy-duty twin unit electric 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. 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.