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Tertiary | 28 Oct 2019

Ormazabal switchgear powering the new Marienturm skyscraper in Frankfurt

The Frankfurter skyline is unique: more than 30 buildings reach a height of over 100 metres on a comparatively small area. Highly dense urban areas and building construction sites pose some challenges for the grid operators in terms of energy supply. In order to ensure a reliable energy supply for the 155 meter high Marienturm, the Mainova subsidiary NRM Netzdienste Rhein-Main GmbH, which is responsible for operating the Frankfurter power grid, relies on medium-voltage technology from Ormazabal.
Ormazabal has supplied a total of 26 gae630 cubicles for the Marienturm.
These provide the complete energy supply for the building on the 10 kV level. The 11-cubicle head-end station is installed on the ground floor, the four other systems were placed on different floors of the tower. To increase safety, they are supplied via several ring lines from the head-end station. One challenge was the reduced height of the switchgear rooms. For this type of application, Ormazabal has carried out an arc fault type test for low rooms up to 2.2 metres height in accordance with IEC 62271-200. Ormazabal could therefore support NRM in several high-rise projects in the Frankfurter area in recent years. Innovative developments from Ormazabal such as the arc diffuser and the phase separator have also been used several times in this context.
Ormazabal and Mainova have been working together for 30 years now. "We are always happy to be approached with projects like this," says Jürgen Dzierzan, Ormazabal sales representative for the North-West region. "We are proud to contribute to the reliable energy supply of such an important hub as Frankfurt's banking district". NRM project manager Henrik Triebe adds: "Ormazabal supports us with customer-oriented solutions and is a proven partner we can rely on as a network operator.“