page_title: China Railway CRH380A
section_title: Technical features
hierarchical_section_title: China Railway CRH380A / Development / Technical features
caption_attribution_description: English: 201701 2 CRH380AL EMUs at Shanghai Hongqiao Station. The left one is CRH380AL-2600 by Zhengzhoudong Depot operating G1813-G1936; the right one is CRH380AL-2561 by Shijiazhuang Depot operating G2811-G2812. It is like the reappearance of a scene 4-5 years before.
context_page_description: The CRH380A Hexie is a Chinese electric high-speed train that was developed by CSR Corporation Limited and is currently manufactured by CSR Qingdao Sifang Locomotive & Rolling Stock Co., Ltd. As a continuation of the CRH2-380 program it both replaces foreign technology in the CRH2 with Chinese developments and increases its top speed. The CRH380A is designed to operate at a cruise speed of 350 km/h and a maximum speed of 380 km/h in commercial service. The original 8-car train-set recorded a top speed of 416.6 km/h during a trial run. The longer 16-car train-set reached 486.1 km/h.
  CRH380A is one of four Chinese train series which have been designed for the new standard operating speed of 380 km/h on newly constructed Chinese high-speed main lines. Officially, it is the only series of the four not based on a foreign design, and although it was not produced under a technology transfer agreement, there have been accusations that it is based on unlicensed Shinkansen technology.
  The other three series are CRH380B, which uses technology from Siemens, CRH380C, with technology from Hitachi, and CRH380D, with technology from Bombardier Transportation.
context_section_description: According to CSR, the overall design of CRH380A reflects ten major goals.
  Low-resistance, streamlined head. The nose of the train has a resistance coefficient of less than 0.13, aerodynamic resistance was reduced by 6.1%, aerodynamic noise by 7%, aerodynamic lift by 51.7% and the lateral force acting on the head by 6.1%.
  Vibration mode system matching. The CRH380A uses a lightweight aluminum alloy body whose total weight is no more than 9 t (8.9 long tons; 9.9 short tons), less than 17% of the entire vehicle; CSR has comprehensively improved the body structure, adopting a large number of new vibration damping materials. It also designed the bogie to match the performance of the body and optimized the train body's natural frequencies, which helps reduce structural vibrations at high speeds and improves ride comfort.
  Improved airtightness: The pressure changes inside the train are controlled to 200 Pa (0.029 psi)/s, with the maximum pressure change inside the train remaining below 800 Pa (0.12 psi) compared with the standard value of 1,000 Pa (0.15 psi). This improves passenger comfort when the train is entering and exiting tunnels at high speed.
  Safe and reliable high-speed bogies. The train is equipped with SWMB-400/SWTB-400 bolster-less bogies. These are a redesign of the SWMB-350/SWTB-350 bogies used by CRH2C; their critical instability speed is 550 km/h (342 mph). The new train's derail coefficient is 0.34 at a speed of 386 km/h (240 mph) while the maximum derail coefficient of the CRH2A is 0.73.
  Advanced noise control technology. By reducing sources of noise and adopting new sound absorbing and insulating materials, CSR has been able to control noise inside the train. The noise level is at 67 dB - 69 dB when running at 350 km/h (217 mph), which is similar to the CRH2A running at 250 km/h (155 mph).
  High-performance traction system, with YQ-365 motors manufactured by CSR Zhuzhou Electric Co., Ltd and CI11 Traction converters by Zhuzhou CSR Times Electric. The CRH380A has a new power unit configuration to maximize traction power. This allows the train to accelerate to 380 km/h (236 mph) in 7 minutes.
  Regenerative braking with a maximum energy feedback rate of 95%. With each stop nearly 800 kWh of electric power can be fed back to the electric grid.
caption: Two CRH380ALs at Shanghai Hongqiao railway station.
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