91 264 83 30 cetren@cetren.es


In Cetren we certify, assess, verify and validate railways. Our experience and exclusive dedication to the sector allows us to provide not only experience, but also integral solutions to certification that make our work recognized as guarantee of quality in the railway sector.

CETREN is a Notified Body by the Spanish State to the European Commission and other European Union Member States, to perform “CE” verification of subsystems and assessment of the conformity or suitability to use Interoperability constituents under Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union.


CETREN is a Designated Body:

  •  In order to perform verification and conformity assessment procedures set in Article 2 under Commission decisions regarding the adoption of interoperability technical specifications, referring to Spanish standards that relate to aspects that are not described in the TSI, but are common to high-speed and conventional rail systems, in Infrastructure, Energy, Rolling Stock and Control, Command and Signaling. (TSI notified with numbers C (2002) 1947, 1948, 1949 and 1952, OJEC L/245 of 12/9/2002).
  • In the field of rolling stock, in accordance with Order FOM/167/2015, of 6 February, which governs the conditions for structural subsystems, lines and rail vehicles to enter into service; and in accordance with the Railway Instruction: Technical specifications of railway rolling stock for putting into service of self-propelled units, locomotives and carriages (IF MR ALC-20).
  • To assess Spanish technical standards included in “Circular Resolution 2/2017 of the State Agency for Railway Safety, on Technical Standards on Interoperability of Infrastructure, Energy, People with Reduced Mobility and Control, Command and Signaling, and bodies in charge of their verification; and in Circular Resolution 2/2019, amending it.
CETREN is a product certification body by third party, independent, impartial and competent in all railway sector areas:

  • Infrastructure
  • Energy
  • Rolling Stock
  • Control, Command and Signaling
CETREN performs risk assessment activities in accordance with Commission Implementing Regulation (EU) No. 402/2013 of 30 April 2013, on adopting a common safety method to assess and value risk and Commission Regulation (EU) 2015/1136 of 13 July 2015, amending Regulation (EU) No 402/2013, aforementioned.

It likewise performs activities of independent safety project assessment of railway applications in accordance with the following standards:

  • UNE-EN 50126:2005. Railway applications. Specification and proof of reliability, availability, maintainability and safety (RAMS).
  • UNE-EN 50128:2012. Railway applications. Communication, signaling and processing systems. Software for railway control and protection systems.
  • UNE-EN 50129:2005. Railway applications. Communication, signaling and processing systems. Electronic systems related to safety for signaling.


In order to know the validity of the certificates issued by Cetren, you can address your query to cetren@cetren.es .

Any user of a product certified by CETREN or a third party interested in it, can inform us of any defect or anomaly in it, by contacting CETREN by email cetren@cetren.es or by post mail (CETREN, C / Paseo de la Castellana nº 91 – 28046 – Madrid).