China Railways SS7B

The Shaoshan 7B (Chinese: 韶山7B) is a type of electric locomotive used by 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 韶山7B
SS7B-0002, Liuzhou, May 2018
Type and origin Power type Electric Builder Datong Electric Locomotive Works Model SS7B Build date 1997 Total produced 2
Specifications Configuration: ​  • UIC Bo'Bo'Bo' Gauge 1,435 mm (4 ft 8+1⁄2 in) Wheelbase 17,280 mm (56 ft 8 in) Length 20,800 mm (68 ft 3 in)(length of locomotive chassis) 22,016 mm (72 ft 2.8 in) (between coupler centers) Width 3,105 mm (10 ft 2.2 in) Height 4,120 mm (13 ft 6 in) Axle load 25 t (24.6 long tons; 27.6 short tons) Electric system/s 25 kV AC Catenary Current pickup(s) Pantograph Transmission AC – DC
Performance figures Maximum speed 100 km/h (62 mph) Power output 4,800 kW (6,400 hp) Tractive effort 485 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 electric locomotive which based on the SS7 Electric Locomotive. Two SS7Bs' each axis axle load 25 tons.^[4]

See also

• List of locomotives in China
• China Railways SS7
• China Railways SS4C
• China Railways DF7E
• China Railways DF8B