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Developed
in 1992 by Datong Works. Their design originate from the 6K locomotives
(imported from Japan) and use the special Bo-Bo-Bo axle arrangement. The
centre bogie allows around 20 cm of horizontal movement. So they can pass
curvy tracks in hilly areas. The only exception is in SS7E in that they
use Co-Co axle arrangement. Their high power enable them to climb up steep
slopes. Until Dec 2003, SS7 are located at Kunming Depot and are working
in Nankun Line (Nanning-Kunming). SS7C are located at Kunming, Chongqing,
Liuliping and Xiangfan (Hubei Province). They are used in hauling passenger
trains in hilly areas. The possibility of hauling freight trains is under
investigation. 50 SS7D are made and they are all located at Xi'an Depot,
hauling in the LongHai Line (Zhengzhou-Baoji section). Around 50 SS7E
are made. Half of them are located at Xi'an Depot for hauling trains from
Zhengzhou to Baoji. Another half are located at Lanzhou Depot for hauling
trains from Lanzhou to Tianshui. Specifications are shown as follows:
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SS7 |
SS7B |
SS7C |
SS7D |
| Builders |
Datong |
Datong |
Datong |
Datong |
| Production Period |
1992 |
1997 |
1998 |
1999 |
| Number Range |
0001about |
0001-0002 |
0001about |
00001about |
| Axle Arrnagement |
Bo-Bo-Bo |
Bo-Bo-Bo |
Bo-Bo-Bo |
Bo-Bo-Bo |
| Continuous Power |
4800kW |
4800kW |
4800kW |
4800kW |
| Axle Weight |
23t |
25t |
22t |
21t |
| Weight |
138t |
150t |
132t |
126t |
| Rated Traction
Effort |
385kN |
385kN |
220kN |
171kN |
| Start Traction
Effort: |
485kN |
485kN |
310kN |
245kN |
| Min. Curve Negotiable |
125m |
125m |
125m |
125m |
| Max Speed |
100km/h |
100km/h |
120km/h |
170km/h |
| Length |
20800mm |
20800mm |
20800mm |
20800mm |
| Width |
3105mm |
3105mm |
3100mm |
3100mm |
| Height(when pantograph
down) |
4700mm |
4700mm |
4700mm |
4700mm |
| between two end
coupler centres |
22016mm |
22016mm |
22016mm |
22016mm |
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Photo:SS7/SS7C/SS7D/SS7E
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SS7 |
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Two SS7 stopping
at Kunming Depot. (Photoed by Henry Tang in 8/2003 at Kunming, Yunnan
Province) |
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SS7 - 0003 stopping at
Kunming Depot. (Photoed by Henry Tang in 8/2003 at Kunming, Yunnan
Province) |
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SS7 - 0002 stopping at
Kunming Depot. (Photoed by Henry Tang in 8/2003 at Kunming, Yunnan
Province) |
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Side view of SS7. (Photoed
by Henry Tang in 8/2003 at Shilin, Yunnan Province) |
¡@ |
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SS7C
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SS7C No.0016
running in - December 2002. Photo by Arthur Lau. |
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SS7C No.0042
at Zhengzhou Depot - December 2002. Photo by Arthur Lau. |
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SS7C No.0042
at Zhengzhou Depot - December 2002. Photo by Arthur Lau. |
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SS7C at
Zhengzhou Depot - December 2002. Photo by Arthur Lau. |
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SS7C at
Zhengzhou Depot - December 2002. Photo by Arthur Lau. |
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SS7C and
SS7D at Zhengzhou Depot - December 2002. Photo by Arthur Lau. |
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SS7D |
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SS7D No.0025
and 0026 at Zhengzhou Depot - December 2002. Photo by Arthur
Lau. |
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SS7D No.0018
stop in Zhengzhou Depot - December 2002. Photo by Arthur Lau. |
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SS7D at Zhengzhou
Depot - December 2002. Photo by Arthur Lau. |
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SS7D is
Bo-Bo-Bo Axle arrangment - December 2002. Photo by Arthur Lau. |
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SS7D bogie
and builder's plate - December 2002. Photo by Arthur Lau. |
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SS7D No.0024
between DF4DK and SS7C- December 2002. Photo by Arthur Lau. |
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SS7D No.0025
at Zhengzhou Depot - December 2002. Photo by Arthur Lau. |
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SS7D No.0025
at Zhengzhou Depot- December 2002. Photo by Arthur Lau. |
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SS7D No.0025
- December 2002. Photo by Arthur Lau. |
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SS7E
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The first
SS7E, numbered 0001, is made by Datong. (12/2003 photoed by Henry
Tang at Xi'an Depot) |
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Nameplate of Datong |
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Bogie of SS7E-0001 |
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Maximum speed 170 km/h |
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Motor and hollow axle
of SS7E |
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Driving panel |
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The only one SS7E made
by Dalian is numbered 7001. (12/2003 photoed by Henry Tang at Xi'an
Depot) |
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Bogie of SS7E-0001 |
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Nameplate of Dalian |
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Corridor |
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Drinking Facility |
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