An arrangement for supplying electrical energy to electric traction motors in a rail vehicle and for supplying electrical energy to additional electric auxiliaries for the operation of the rail vehicle, wherein the arrangement comprises: - at least two internal combustion engines, - for each of the at least two internal combustion engines, an electric machine assigned to it for generating the electrical energy, wherein the electric machine is mechanically coupled to the internal combustion engine so that the electric machine is driven by the internal combustion engine in the event of a generator operation of the electric machine so that at least a first and a second internal combustion engine and machine combination are formed, - at least one generator rectifier for rectifying alternating currents which are generated by the electric machines during the generator operation of the respective electric machine, - a DC link (8, 10), which is electrically connected to the electric machines or to a part of the electric machines via the at least one generator rectifier if the electric machine or the electric machines feeds/feed energy into the DC link (8, 10), and which is electrically connected to at least one traction motor, - an auxiliaries inverter with a direct voltage connector and an alternating voltage connector, which auxiliaries inverter is connected to the DC link (8, 10) via the direct voltage connector and is connected to an auxiliaries connector of the auxiliaries via the alternating voltage connector in order to supply electrical energy from the DC link (8, 10) to the auxiliaries, characterised by - an emergency operation electric line, via which the electric machine of the first internal combustion engine and machine combination is connected to the auxiliaries during an emergency operation, in which case the auxiliaries inverter is out of operation, in order to supply energy to the auxiliaries in the emergency operation, wherein the electric machine of the first internal combustion engine and machine combination is electrically connected to the DC link (8, 10) via the generator inverter or via one of the generator inverters if the electric machine of the first internal combustion engine and machine combination feeds energy into the DC link (8, 10). - at least two internal combustion engines, - for each of the at least two internal combustion engines, an electric machine assigned to it for generating the electrical energy, wherein the electric machine is mechanically coupled to the internal combustion engine so that the electric machine is driven by the internal combustion engine in the event of a generator operation of the electric machine so that at least a first and a second internal combustion engine and machine combination are formed, - at least one generator rectifier for rectifying alternating currents which are generated by the electric machines during the generator operation of the respective electric machine, - a DC link (8, 10), which is electrically connected to the electric machines or to a part of the electric machines via the at least one generator rectifier if the electric machine or the electric machines feeds/feed energy into the DC link (8, 10), and which is electrically connected to at least one traction motor, - an auxiliaries inverter with a direct voltage connector and an alternating voltage connector, which auxiliaries inverter is connected to the DC link (8, 10) via the direct voltage connector and is connected to an auxiliaries connector of the auxiliaries via the alternating voltage connector in order to supply electrical energy from the DC link (8, 10) to the auxiliaries, - an emergency operation electric line, via which the electric machine of the first internal combustion engine and machine combination is connected to the auxiliaries during an emergency operation, in which case the auxiliaries inverter is out of operation, in order to supply energy to the auxiliaries in the emergency operation, wherein the electric machine of the first internal combustion engine and machine combination is electrically connected to the DC link (8, 10) via the generator inverter or via one of the generator inverters if the electric machine of the first internal combustion engine and machine combination feeds energy into the DC link (8, 10).