Technical Areas


The electrification section is responsible for the electric substations and the Overhead Contact System (OCS). We carry out a systematic revision of the 392 electric substations in our charge, with 3,135,000 kW of power installed. We have increasing their service, having installed a Controlled Distribution System and standardized the new rectifiers, transformers, diodes, fuses, etc.

In this way we have undertaken the duplication of nominal power, raising it from 3,000 to 6,000 kW and increasing the ultra rapid current cutoff levels from 30 to 50 KA in certain substations. Modular type substations have been built, with new OCS analyzers, protection management, etc. that have contributed to a better adaptation of the installations to the needs of our clients, allowing remote management at the present time.

At this time there are 11,057 kilometers of overhead lines. Their maintenance is programmed by coordinating the necessary actions with our regional organizations. Another important aspect is that of the maintenance of the over 2,000 km. of high voltage lines that feed the electric substations of the conventional network.

We carry out annual inspections of the state of the geometrics of the OCS and we analyze the evolution of contact cable wear and tear, to obtain a correct budget planning within our quality parameters, as well as monitoring reliability by means of reports and periodical technical inspections. In this sense, we have developed a variety of computer applications to improve the calculations of critical installations under conditions of standardization and safety. Clear examples are the programmes CALPE (calculation of pantograph length in the different calculation variations) and CALPOR (Rigid OCS Calculation).

We have drawn up Regulations and Technical Studies that ensure the quality of our materials and establish correct assembly criteria, as well as standardizing type CA 160 and CA 220 OCSs.

In the area of Investigation and Development we have worked on new technologies applied to preventive maintenance. In this sense we can highlight the development of the automatic system for measuring contact cable wear (the MEDES system) and the collaboration with various companies in the sector, public and private bodies such as the university or CENELEC, among others.

The fruits of our investigations, development and technical experience provide an opportunity to promote the products developed. We have signed cooperation agreements or sold some of them, such as the MEDES system acquired by the French railroad (SNCF), and its promotion in other Railway Administrations.