The invention provides a traction system for a trainset, especially equipped with a plurality of power feeding means and having a function for effectively selecting a traction system as destination of supply of power obtained from these means in order to enhance the redundancy of the traction system of the train. The trainset comprises a plurality of power generating means, wherein the plurality of power generating means are connected via a plurality of power feeding means. The trainset further comprises a first selector for outputting power to any one of the plurality of power feeding means or a number of arbitrary power feeding means. An inverter means constituting the traction system further comprises a second selector capable of arbitrarily selecting a power system for receiving the power from the plurality of power feeding means. Similarly, an auxiliary power supply means constituting the traction system comprises a third selector capable of arbitrarily selecting a power system for receiving the power from the plurality of power feeding means.