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Traction transformers for high-speed trains

The high-speed rail sector is undergoing huge and rapid growth. Hitachi ABB Power Grids draws on considerable experience in designing and manufacturing transformers for high-speed trains.

Hitachi ABB Power Grids is supplying traction transformers for the high-speed trains manufactured by Alstom, AnsaldoBreda, Bombardier, CAF, Ministry of Railways China, Siemens Mobility and Talgo.

The total weight of the transformers is a factor of crucial importance in very high-speed trains where every kilo counts. By incorporating a number of design innovations like multi-purpose components such as winding and lightweight materials, Hitachi ABB Power Grids has reduced the total weight of the transformers. For instance, Hitachi ABB Power Grids winding enables the train to use both DC and AC systems without adding extra weight.


Product scope

  • Power: 2,500 - 6,000 kVA
  • Network: 25 kV/50 Hz; 15 kV/16 2/3 Hz; 1.5 kV/DC (equipped but not used); 3 kV/DC (equipped but not used); 25 kV/60 Hz
  • Insulating fluid: ester


  • Weight: 4 - 8 tons
  • Size (L x I x H): 3.5 x 2.5 x 0.6 m and 4 x 2.7 x 0.8 m
  • Assembly on vehicle: under frame
  • Tank material: mainly aluminium, steel, low and high temperature steel

Accessories: cooling system, pumps and oil flow indicator, oil level detector, overpressure valve, PT100 for thermal control, thermostat, filling and draining valves, Buchholz relay, current measurement

power plant engineer for substation
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