Drainage in a Battery-Powered Train Maintenance Workshop

The new state-of-the-art maintenance depot of rail vehicle manufacturer Stadler in Rendsburg (Germany) is home to a total of 55 ‘FLIRT Akku’ trains, which are climate-neutral, barrier-free and quiet when travelling on non-electrified or only partially electrified lines in Schleswig-Holstein. HYDROTEC drainage systems ensure fast and effective drainage on the site.

Headquartered in Switzerland, Stadler is one of the world's four largest manufacturers of rail vehicles with more than 14,000 employees and locations in 23 countries. Around four years ago, the company won a tender from NAH.SH GmbH for the delivery of 55 ‘FLIRT Akku’ trains, including maintenance of the vehicle fleet over a period of 30 years.

Modern trains without CO2 emissions

The air-conditioned, barrier-free and quiet trains run on sections of track with overhead lines using classic electric power with raised pantographs, charging the traction batteries in the process. At the same time, the braking energy is also used for charging. When the overhead line ends, the system switches to battery mode - and this now happens on a total of around ten million battery-electric train kilometres on eleven railway lines throughout the state. The average range in battery mode is 150 kilometres.

Unique maintenance centre in Germany

Tailored precisely to the special features of battery trains and the handling, charging and storage of the batteries, the maintenance workshop, which is unique in Germany to date, was built by Stadler on a 77,000 square metre site in Rendsburg and is designed to guarantee stable operation of the trains.
The plant, which employs around 30 skilled workers, includes several workshops, an external cleaning facility, an office and social wing and a two-track vehicle hall with pits and roof work stands.

Efficient, near-natural drainage

The drainage concept for the maintenance centre is based on a separation system with rainwater and wastewater pipes. The rainwater is channelled to the groundwater via an infiltration basin. While the surface water from the roof areas of the workshop complex is discharged untreated into the infiltration basin, the concept provides for the surface water from the logistics areas, the interior cleaning system platform, the access roads and car parks to be discharged pretreated into the infiltration basin. The rainwater from the sealed surfaces is first collected by the MAXI and HYDROblock drainage channels.

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Portrait photo Sales Manager Christian Wenzing

Christian Wenzing
Export Manager

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