China Railways SS7B

Chinese electric locomotive class

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)

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]

## History

[edit]

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

[edit]

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

[edit]

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

## References

[edit]

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.

## External links

[edit]

* SS7B Electric Locomotive, CRRC Datong Co., LTD(English)
* SS7B Electric Locomotive, CRRC Datong Co., LTD(Chinese)

Wikimedia Commons has media related to China Railway SS7B.

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China Railway locomotives

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|

Narrow gauge|

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Diesel|

| Diesel hydraulic|

* BJ
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* DFH21
* NY5
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|

Diesel electric|

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Electric|

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* SS4
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|

AC motor|

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