Case Study iLint copyright Alstom

Rail Case Study: CORADIA ILINT - Running on green energy



Various inspection, safety assessment and certification services as debo and asbo for the first hydrogen-fuelLed multi-unit train set (Coradia ilint 54)


CUSTOMER: Alstom Transport Deutschland GmbH

COUNTRY: Germany / Austria


  • Development and approval of a hydrogen-fuelled multi-unit train set 
  • The train is operated by electrical energy generated from hydrogen using fuel cells
  • Fully fuelled, the train has a range of over 1000 km, maximum speed of 140 km/h

PROJECT PERIOD: June 2017 to October 2020


 SERVICES PROVIDED:German flag roundAustrian flag round

  • i-DeBo services according to MoU for Germany
  • DeBo process for Austria for iLint prototype on state of technology
  • AsBo assessment of the application of the risk management procedure
  • Overall assessment according to §32a EisbG for Austria
  • Various technical individual assessments, in particular also on the subject of hydrogen


  • EBO, MoU procedure, administrative guideline for transmission systems
  • EN 45545 parts 1 to 7
  • EN 50553
  • (Notified) National Technical Regulations (NNTV=NNNTR) for Germany on TSI LOC & PAS
  • Implementing Regulation (EU) 402/2013 in conjunction with 2015/1136
  • EisbG §32a
  • 2014/68/EU

What was the challenge?

The Coradia iLint is a new-generation of hydrogen-fuelled, multi-unit trains generating zero carbon-emissions. These new-generation trains literally produce nothing but “steam” – making them a zero carbon-emission trains in the rail sector.

A particular challenge was the need to meet the early acceptance that management required in order to use tried-and-tested hydrogen technology in the new setting. A partner was required to who is involved in the requirement definition and safety-related testing of the design and features to approve the new train and to bring it safely to the rails.

What was our solution?

TÜV SÜD Rail was involved in Alstom’s Coradia iLint project as a certification and inspection body.

Our team was responsible for the testing and commissioning of Coradia iLint’s first two prototypes. The safety tests referred to various disciplines, including the energy-generation system, the energy-storage system, the onboard hydrogen storage and the necessary hydrogen refuelling infrastructure and safety systems at the train servicing and maintenance stations.

As the safety testing for this project spanned several systems, TÜV SÜD Rail led the assessments and coordinated all tasks related to the approval of the rail system.

Within the timeframe, positive milestones were consistently and promptly achieved. For example, we successfully completed a full inspection and certification of all sub-systems, including the hydrogen tank system and the fuel-cell system, and performed a general safety assessment of the interaction of all hydrogen sub-systems. We also evaluated the possible impacts of a fire on the hydrogen system.

In addition, TÜV SÜD's experts are also involved in the testing and approval processes for the hydrogen infrastructure, providing services such as inspection of the hydrogen filling systems.

Crucially, full approval from the German and Austrian Federal Railway Authorities was achieved based on an EU-wide valid TSI certificate, a positive assessment from the Designated Bodies in Germany and Austria as well as a positive assessment of the Independent Assessment Body.


What was the customer benefit?

Our customer, Alstom Transport, benefitted from a wide-ranging service that took in not just the trains themselves but also the project’s entire hydrogen infrastructure. Through continuous testing and inspection during the design and development phase, the hydrogen train could be approved in time and our customer was able to bring its innovative solution to the market. This has provided Alstom with a sound basis for future planning.

The high level of teamwork between the various divisions of TÜV SÜD during this project offered our client significant synergy effects. This, in turn, enabled our expert colleagues to further grow their experience and being part in bringing a new innovative and sustainable mobility solution to the rails.

Tolga Wichmann, Head of Rail Task Force Hydrogen and Senior Assessor Fire Safety & Alternative Propulsion at TÜV SÜD

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