Arrangement for operating consumers in a rail vehicle with electrical energy, selectively from an energy supply network or from a motor-generator combination

An arrangement for operating consumers in a rail vehicle with electrical energy, wherein the arrangement can be supplied selectively with electrical energy from an energy supply network or from a network-independent electrical energy supply unit, comprising:

• a. a DC voltage intermediate circuit, which is connected to the energy supply network when the arrangement is being supplied from the energy supply network;
• b. at least one traction inverter, which is connected at the DC voltage side to the DC voltage intermediate circuit and to the AC voltage side to which one or more traction motors of the rail vehicle are connected;
• and
• c. an auxiliary system inverter, which at the DC voltage side is connected to the DC voltage intermediate circuit and which at the AC voltage side is connected to a primary side of an auxiliary system transformer, wherein auxiliary systems are connected via an electrical auxiliary system line at a secondary side of the auxiliary system transformer, wherein the auxiliary systems, in contrast to the at least one traction motor, do not serve directly to provide traction of the rail vehicle, wherein the network-independent electrical energy supply unit is electrically connected to the auxiliary system line so that when the arrangement is being supplied by the network-independent electrical energy supply unit, electrical energy generated by said network-independent electrical energy supply unit is transferred via the auxiliary system line, the auxiliary system transformer, and the auxiliary system inverter into the DC voltage intermediate circuit and is available for operating the at least one traction motor.