Abstract: A train set includes a plurality of cars each having a flat designed to receive storage units equipped electrically-powered equipment. The train set includes: a connector for connecting the set to an electricity source which delivers electrical power at a high voltage greater than the rated operating voltage of the equipment; transfer apparatus for transferring electrical power at a high voltage to each car; a voltage step-down circuit connected to the transfer apparatus and from which electrical power is delivered at a low voltage in the vicinity of the rated operating voltage of the equipment; and a distributor for distributing the low-voltage electrical power to each item of electrically-powered equipment. It is also possible to provide a stand-alone generator providing, in particular, redundancy for the electrical power supply for the distributor. The train set is particularly applicable to transporting liquid or solid perishable goods, as well as chemicals, under controlled temperature.