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The SS7C passenger electric locomotive is a 6-axle passenger electric locomotive with a maximum operating speed of 120km/h developed by the company to meet the needs of speed increase on existing lines. The locomotive adopts a single-phase power frequency system, voltage 25kV, AC-DC drive, locomotive axle weight 22t, traction characteristics are constant current starting + quasi-constant speed characteristics, with power factor compensation and axle weight transfer electrical compensation devices, suitable for long ramps and multi-curve lines.
1.The main components such as the locomotive body, bogie, and transformer are all lightweight.
2.The axle type of the locomotive bogie is Bo-Bo-Bo, with single-side braking, motor rolling bearing nose suspension and low-position inclined traction rod.
3.The main circuit adopts two-section bridge phase control (full control + semi-control) and other separate excitation circuits, weakening the stepless speed regulation and stepless magnetic field.
4.The characteristic control mode of constant current starting and quasi-constant speed operation is adopted, and microcomputer control and LCU logic control unit are adopted.
5.Regenerative braking is adopted for electric braking.
6.There is a power supply for train heating and air conditioning, using double-pipe air supply.
| Current system |
Single-phase power-frequency AC |
| Gauge |
1435mm |
| Axle arrangement |
Bo-Bo-Bo |
| Axle load |
22t |
| Locomotive curb weight |
132t |
| Continuous power |
4800kW |
| Maximum operating speed |
120km/h |
| Continuous speed of locomotive |
76km/h |
| Continuous traction force |
220kN |
| Starting traction force |
310kN |
| Electric braking mode |
Regenerative braking |