A railway pantograph system for picking up an electric current from a catenary in which an alternating or direct electric current flows, intended to supply a power unit of a railway vehicle, comprising: - a first circuit for supplying the power unit with direct current, called a DC circuit , adapted to receive a direct electric current, and comprising a DC-DC converter adapted to convert said direct electric current to supply the power unit - a second circuit for supplying the power unit with alternating current, called an AC circuit , adapted to receive an alternating electric current, and comprising a main transformer adapted to transform the alternating electric current to supply the power unit , - an intermediate circuit , connecting the DC circuit and the AC circuit , - at least one pantograph, called a DC pantograph , adapted to connect the intermediate circuit and the catenary , and to transmit to said intermediate circuit a direct electric current coming from the catenary when the latter is traversed by a direct electric current, - at least one pantograph, known as an AC pantograph , adapted to connect the intermediate circuit and the catenary , and to transmit to said intermediate circuit an alternating electric current coming from the catenary when the latter is traversed by an alternating electric current, characterised in that the intermediate circuit comprises a current limiting system, comprising a superconducting cable disposed in the intermediate circuit between said DC pantograph and the AC circuit and configured to have a first socalled superconducting state, wherein the superconducting cable has a low resistance in the event of a direct electric current flowing to the AC circuit at a current level below a predetermined current level, called the critical current level, and to switch to a second state, called the critical state, wherein the superconducting cable has a high resistance in the event of a direct electric current flowing to the AC circuit of a current level greater than the critical current level. - a first circuit for supplying the power unit with direct current, called a DC circuit , adapted to receive a direct electric current, and comprising a DC-DC converter adapted to convert said direct electric current to supply the power unit - a second circuit for supplying the power unit with alternating current, called an AC circuit , adapted to receive an alternating electric current, and comprising a main transformer adapted to transform the alternating electric current to supply the power unit , - an intermediate circuit , connecting the DC circuit and the AC circuit , - at least one pantograph, called a DC pantograph , adapted to connect the intermediate circuit and the catenary , and to transmit to said intermediate circuit a direct electric current coming from the catenary when the latter is traversed by a direct electric current, - at least one pantograph, known as an AC pantograph , adapted to connect the intermediate circuit and the catenary , and to transmit to said intermediate circuit an alternating electric current coming from the catenary when the latter is traversed by an alternating electric current, <EOS>