Electrical power supply assembly for drive units, for operating a rail vehicle on electrical supply networks

An electric interface is connected to power supply (A) and direct current (DC) voltage side of rectifier (181) of module (M1). The primary sides of transformers (171,172) of modules (M1,M2) are connected directly by electric interface and indirectly through inverter (161,162). The DC side of rectifier (182) of module (M2) is connected with electric terminal for connecting arrangement to intermediate circuit (ZK) so that power for operating driving motor (12) is transmitted from electric power supply network through rectifiers and inverters in intermediate circuit. Independent claims are included for the following: (1) method for operating rail vehicle; and (2) method for manufacturing electric power supply arrangement.