China Railways SS7

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SS7
SS7
SS7 electric locomotive
Power type Electric
Builder Datong Electric Locomotive
Model SS7
Build date 1992-2007
Total production 113+
UIC classification Bo'Bo'Bo'
Gauge 1,435 mm
Wheelbase 17,080 mm
Length 22,016 mm (between coupler centers)
Width 3,105 mm
Height 4,700 ± 30 mm
Axle load 23 t
Electric system(s) 25 kV AC
Transmission AC - DC
Top speed 100 km/h
Power output 4,800 kW
Tractive effort 485 kN (starting)
351 kN (continuous)

The SS7 is a type of electric locomotive used on the People's Republic of China's national railway system. They are widely used on electrified lines in the southwest part of China.

The design of SS7 was influenced by the 6K, an electric locomotive model imported from Japan.

Derivatives of SS7 include SS7B, SS7C, SS7D and SS7E.

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