China Railways SS4

SS4
韶山4
SS4-0113
Type and origin
Power typeElectric
BuilderDatong Electric Locomotive Works
Zhuzhou Electric Locomotive Works
Ziyang Locomotive Works
Dalian locomotive works
ModelSS4
Build date1985–2006
Total produced1577
Specifications
Configuration:
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 • UICBo′Bo′+Bo′Bo′
Gauge1,435 mm (4 ft 8+1⁄2 in)
Wheelbase4,300 mm (14 ft 1 in)
Length32,832 mm (107 ft 8.6 in) (between coupler centers)
Width3,100 mm (10 ft 2 in)
Height4,040 mm (13 ft 3 in)
Axle load23 t (22.6 long tons; 25.4 short tons)
Electric system/s25 kV AC Catenary
Current pickup(s)Pantograph
TransmissionAC – DC
Performance figures
Maximum speed100 km/h (62 mph)
Power output6,400 kW (8,600 hp)
Tractive effort628 kN (141,000 lbf) (starting)
436.5 kN (98,100 lbf) (continuous)

The Shaoshan 4 (Chinese: 韶山4) is a type of electric locomotive used on the People's Republic of China's national railway system. This locomotive was built by the Zhuzhou Electric Locomotive Works. The power supply was industrial-frequency single-phase AC, and the axle arrangement Bo′Bo′+Bo′Bo′.

In 1993, Zhuzhou Electric Locomotive Works produced SS4G (Chinese: 韶4改). SS4G are very similar to standard SS4, apart from an improved electrical technology.

SS4 Electric Locomotive is an eight shaft fixing reconnection heavy freight electric locomotive which based on two four-axle locomotives connected. One unit, SS4-0043, was damaged in a tunnel during the 2008 Sichuan earthquake.

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