Method for managing a railway electrical circuit

A system for detecting presence of a train rolling on a railway track formed by two rails, the railway track being subdivided in successive track sections forming successive electrical circuits independently fed with an electrical current for monitoring the presence of the train rolling on one of the track sections, comprising:

• a transmission device electrically connected to the two rails for feeding the corresponding electrical circuit with the electrical current, located at one end of the track section, and a reception device for detecting the electrical current circulating in the electrical circuit, located at an opposed end of the corresponding track section,
• the transmission device being adapted to continuously feed the corresponding electrical circuit with the electrical current corresponding to a minimal electrical power,
• the reception device being adapted to monitor the presence of the train on the corresponding track section by measuring the current circulating in the corresponding electrical circuit,
• the transmission device being adapted to apply to the corresponding electrical circuit a nominal electrical power if the corresponding reception device detects a reduction of the current circulating in the electrical circuit, denoting that the train is present on the corresponding track section and induces a short-circuit between the two rails by the train, at least until the train exits the corresponding track section,
• the transmission device being adapted to apply to the corresponding electrical circuit the minimal electrical power having a power-saving power value, which is inferior to the nominal power, if the corresponding reception device detects that no train is present on the corresponding track section,
• wherein the transmission device keeps the electrical power consumed by the electrical circuit of the corresponding track section when the train is present under a limited value when the nominal electrical power is applied to this electrical circuit,
• wherein the reception device is adapted to emit signals containing information denoting the presence or absence of the train, on the current circulating in the electrical circuit, and
• wherein the system comprises at least one control box adapted to receive the signals from the reception device and which controls the current delivered by the transmission device on the basis of the information on the current circulating in the electrical circuit contained in the signals so as to prevent increase of the power consumption of the electrical circuit to a maximum power value due to the advancing of the train towards the end associated with the transmission device.