CRRC Datong SS7
Built by Datong
Overview of the CRRC Datong SS7
Discover the powerful SS7 electric locomotive, a key asset of the China Railway Corporation.
Built by Datong between 1992 and 2006, this impressive series, also known as the SS7 韶山7, saw 113 units produced.
With a top speed of 120 km/h, the SS7 is designed for efficient and reliable railway operations.
It features a Bo'Bo'Bo' UIC axle configuration and operates on 25 kV AC 50 Hz electric systems, ensuring consistent performance.
This electric locomotive, running on a 1435 mm gauge track, embodies advancements in Chinese railway technology.
CRRC Datong SS7 technical specifications
| Value | Imperial / US | |
|---|---|---|
| Series | SS7 韶山7 | |
| Built by | Datong · 1992–2006113 units | |
| Top speed | 120 km/h75 mph | |
| Electric systems |
| |
| Track gauge | 1,435 mmStandard gauge4 ft 8½ in | |
| UIC axle arrangement | Bo'Bo'Bo' | |
| Axle load | 23 t50,706 lb |
Operators of the CRRC Datong SS7
Railway companies that have operated the SS7, with the class designation used by each of them.
| Operator | Class | Country |
|---|---|---|
| China Railway Corporation | CR SS7 | China |
More electric locomotives from CRRC Datong

CRRC Datong
SS4G
Electric locomotive
1993–2007 · 100 km/h

CRRC Datong
SS7C
Electric locomotive
1998–2007 · 120 km/h

CRRC Datong
SS6B
Electric locomotive
1994–2002 · 100 km/h

CRRC Datong
HXD3 / SSJ3 / DJ3
Electric locomotive
2006–2011 · 120 km/h

CRRC Datong
SS3B
Electric locomotive
2002–2009 · 100 km/h

CRRC Datong
SS7D
Electric locomotive
1999–2002 · 170 km/h

CRRC Datong
SS3
Electric locomotive
1978–2006 · 100 km/h
CRRC Datong
SS7B
Electric locomotive
1997 · 100 km/h
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