China Railways SS7B

The Shaoshan 7B (Chinese: 韶山7B) is a type of electric locomotive used by the China's national railway system China Railways. This locomotive was one of China's 25-ton axle load test locomotives in the 1990s.[1]

SS7B Electric Locomotive
韶山7B型电力机车
SS7B-0002, Liuzhou, May 2018
Type and origin
Power typeElectric
BuilderDatong Electric Locomotive Works
ModelSS7B
Build date1997
Total produced2
Specifications
Configuration:
​
 • UICBo'Bo'Bo'
Gauge1,435 mm (4 ft 8 1⁄2 in)
Wheelbase17,280 mm (56 ft 8 in)
Length20,800 mm (68 ft 3 in)(length of locomotive chassis)
22,016 mm (72 ft 2.8 in) (between coupler centers)
Width3,105 mm (10 ft 2.2 in)
Height4,120 mm (13 ft 6 in)
Axle load25 t (24.6 long tons; 27.6 short tons)
Electric system/s25 kV AC Catenary
Current pickup(s)Pantograph
TransmissionAC – DC
Performance figures
Maximum speed100 km/h (62 mph)
Power output4,800 kW (6,400 hp)
Tractive effort485 kN (109,000 lbf) (starting)
385 kN (87,000 lbf) (continuous)

History

According to the design task book issued by the Ministry of Railways in 1996, Datong Electric Locomotive Works developed SS7B Electric Locomotive. However, there were only two SS7Bs manufactured.

At first, two SS7Bs belong to Kunming Locomotive Depot, Kunming Railway Bureau, later two SS7Bs were transferred to Nanning Locomotive Depot, Nanning Railway Bureau. In 2005, SS7B-0001 was destroyed in an accident which happened in Nanning-Kunming Railway.[2][3]

SS7B-0002 was transferred to Liuzhou Locomotive Depot in the spring of 2018.

Design

SS7B is a 25-ton axle heavy freight freight electric locomotive which based on the SS7 Electric Locomotive. Two SS7Bs' each axis axle load 25 tons.[4]

See also

References
  1. 非人. "SS7B型电力机车". Trainnets.com (in Chinese). 非人狂想屋. Retrieved 29 May 2018.
  2. Suyong, Deng. "一列货车因山体滑坡发生颠覆 致使南昆铁路中断" (in Chinese). Retrieved 29 May 2018.
  3. Suyong, Deng. "因山体滑坡而中断运行的南昆铁路恢复通车" (in Chinese). Retrieved 29 May 2018.
  4. Yunwu, Xu (January 1999). "SS7B型电力机车的开发重点". Electric Drive for Locomotive (in Chinese). Zhuzhou: Zhuzhou Electric Locomotive Research Institute: 23–25. ISSN 1000-128X.
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