DES-S3B locomotive is composed of two identical 6-axle locomotives by internal coupling, with each unit forming a complete system.
A traction transformer and two rectifiers are installed on each unit of DES-S3B. Each rectifier energizes three shunted DC traction motors, which can be isolated individually in case of failure to ensure normal performance of other motors so as to enhance utilization of locomotive.
Regarding its air brake, DK-1 E-P brake for SS series locomotives is adopted while backup resistance braking is employed for its dynamic brake
Control system of DES-S3B is structured by two-pole network of train bus and vehicle bus. Multiple operation control and information exchange between two units are fulfilled through WTB (wired train bus) with double redundancy and automatic changeover. MVB (multiple vehicle bus) is used to connect each control unit inside the single locomotive.
Line voltage |
25kV, 50Hz |
Wheel arrangement |
2(Co-Co) |
Axle load |
23t |
Rated power |
2X4,350 kW |
Continues tractive effort |
2X 317.8 kN |
Starting tractive effort |
2X 490 kN |
Design speed |
100 km/h |
Min. curve negotiation radius |
125 m |