China Railways SS1

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SS1249 200908.jpg
Type and origin
Power type Electric
Builder Zhuzhou Electric Locomotive Works
Model 6Y1 / SS1
Build date 1968—1988
Total produced 7 (6Y1)
819 (SS1)
 • UIC Co'Co'
Gauge 1,435 mm (4 ft 8 12 in)
Length 19,400 mm (63 ft 8 in)
Electric system(s) 25 kV 50 Hz AC Catenary
Current source Pantograph
Transmission AC—DC
Performance figures
Maximum speed 95 km/h (59 mph)
Power output 3,780 kW (5,070 hp)

The Shaoshan 1 (Chinese: 韶山1; pinyin: Sháoshān Yī Nickname: Chinese: 芍药; pinyin: Sháoyào) is a type of AC-powered electric locomotive used by China Railways. This locomotive was the first Chinese electric main line locomotive, built by the Zhuzhou Electric Locomotive Works with the assistance of the Soviet Union and following the design of the Soviet-H60 electric locomotive (SŽD VL60). The power supply was industrial-frequency single-phase AC, and the axle arrangement Co-Co.


The first prototype locomotive, 6Y1-001, which used an ignitron-controlled rectifier, was produced in 1958. A further 6 prototypes (002 to 007) were produced between 1962 and 1966. A silicon semiconductor-controlled rectifier was used from No. 004 onwards.

In response to technology of the French-made 6Y2 locomotive, Zhuzhou Plant made major modification in the design of the 6Y1 locomotive, improving the reliability of the rectifier, traction motors and rheostatic braking system. The eighth locomotive, No. 008, was produced in 1968. The series was also renamed from 6Y1 to SS1 (SS stands for Shaoshan, birthplace of Chinese leader Mao Zedong). The model went out of production in 1988 with a total of 826 manufactured: 7 of 6Y1 and 819 of SS1.[1]


  • SS1-008: is preserved at the China Railway Museum.[2]
  • SS1-061: is preserved at Baoji Electric Locomotive Repair Depot
  • SS1-156: is preserved at Zhengzhou Century Amusement Park
  • SS1-160: is preserved at Beijing Railway Electrification College[3]
  • SS1-254: is preserved at Fengtai Locomotive Depot, Beijing Railway Bureau.
  • SS1-277: is preserved at Heilongjiang Communications Polytechnic.[4]
  • SS1-307: is preserved at Yuci Reentry Depot, Taiyuan Railway Bureau
  • SS1-309: is preserved at Taiyuan Locomotive Depot, Taiyuan Railway Bureau
  • SS1-321: is preserved at Wuhan Railway Vocational College Of Technology
  • SS1-695: is preserved at the Shenyang Railway Museum.
  • SS1-818: is preserved at the Southwest Jiaotong University.[5]


  1. ^ SS1型电力机车_非人狂想屋
  2. ^ 我国自行研制的首台韶山1型国产电力机车"退役"
  3. ^ 北京铁路电气化学校轨道交通类(城铁车辆驾驶与检修、电力机车驾驶与检修方向)实训基地
  4. ^ 黑龙江交通职业技术学院三台机车顺利回迁校内实训基地
  5. ^ 南门蒸汽机车迎来新伙伴——东风4型内燃机车、韶山1型电力机车入住西南交大