Network modernisation

Providing the energy for your transport

With 2,000 km of cables distributed under 500 km of roadway, our own high-voltage network provides 75% of the electrical power needed to operate lines, stations and premises on the metro, RER and tram network.

We consume up to 1.5 billion kWh a year for metro, RER and tram operations. Consumption includes electrical energy for rolling stock traction and also what is needed for the various equipment in our facilities, such as lifts, escalators, lighting, heating, ventilation, control and information systems.

Human energy, rail network energy

A dedicated RATP department ensures the reliability and continuity of the network power supply. It brings together the teams, skills and equipment that guarantee a 99.9% availability rate for electrical power in complete safety, thus ensuring the daily mobility of 11 million passengers.

Tram energy

Each RATP tram line is powered directly from the ERDF grid and has its own rectification substations to convert the 20,000 V alternating current supplied into 750 V direct current. The transformed current is sent to overhead lines (catenaries) in contact with the trains.

RATP high-voltage facilities

The high-voltage electricity bought from various suppliers is delivered at 63 kV or 225 kV to 7 high-voltage substations located all over Paris. Here it is transformed to a voltage of 15 kV, redistributed using two distinct cable networks:

  • to 300 lighting and power substations, providing 400 V alternating current for operation of stations, buildings and workshops,
  • to 160 rectification substations providing traction power at 750 V direct current for the metro and 1,500 V for the RER.

Did you know?

of underground cables
Métro en circulation
Gérard Rollando
Gérard Rollando

Guaranteed service

The general organisation of RATP’s electricity network is sufficiently secure to ensure that the isolated loss of a single electrical connection has no impact on the network. In the event of simultaneous incidents, however, the time for return to service can be longer and cause partial power loss on a line or a line section, cuts to station lighting or disruption to equipment operation.

All day long, throughout the year

All operations carried out on the RATP cable network, both preventive and corrective, are carried out by a highly qualified internal department. In accordance with regulations on public roadworks, this department carries out extension, deviation and heritage renewal work on the network, along with emergency interventions, day or night, all year round, in case of an incident.

An RATP cabling worksite

Once the hole has been dug by an excavation company, the high-voltage cables are unrolled before being placed underground. Our staff wire up the new cables to the network connecting them to the relevant rectification substation or light and power substation, using junction boxes.

For more information, download the dedicated brochure [This content is not available in English].

Maintenance works