China Railways SS3B

The Shaoshan 3B (Chinese: 韶山3B/大3B ) is a type of electric locomotive used on the People's Republic of China's national railway system. This locomotive was built by the Ziyang Electric Locomotive Works. The power supply was industrial-frequency single-phase AC, and the axle arrangement Co-Co+Co-Co.

SS3B Electric Locomotive is a twelve shaft fixing reconnection heavy freight electric locomotive which based on two six-axle locomotives connected.

Named locomotives

 * SS3B-5001: "Pioneer in power of God" (Chinese: 先锋力神)

Main users
SS3Bs have been used by several users:
 * China Railway Corporation
 * Chengdu Railway Bureau
 * Nanning Railway Bureau
 * Guangzhou Railway Group Co., Ltd.
 * Kunming Railway Bureau
 * Xi'an Railway Bureau
 * Xiaoyi-Liulin Railway
 * Dongsheng-Wuhai Railway

Manufacturers
SS3Bs have been manufactured by several companies:
 * Zhuzhou Electric Locomotive Works (0001～0119)
 * Datong Electric Locomotive Works (6001～6129)
 * Ziyang Locomotive Works (5001～5104)
 * Dalian locomotive works (7001)