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Customer application

Uncompromising Safety – Electrical Installation at the University Hospital

In the central area of Building 23, WAGO’s TOPJOB® S Through and Multilevel Installation Terminal Blocks ensure that electrical wiring is safe and reliable.

Safety is paramount during electrical wiring. And this is critical to buildings that house scores of patients and staff. To ensure safety in common scenarios like this, the VDE 0100 safety standard contains requirements, such as that the neutral conductor must not be disconnected during testing of insulation resistance. These measurements can be easily performed using multilevel installation terminal blocks with an internal N-disconnect from WAGO’s TOPJOB® S portfolio.

The University Hospital was founded 100 years ago as part of Goethe University in Frankfurt am Main, Germany. Today, more than 4,000 employees work in 32 specialized clinics and institutes. The facility houses nearly 1,200 beds for the more than 50,000 patients who receive in-patient care annually. The University Hospital, which spans 50 buildings in a 433,000 m2 area, is large enough to almost be its own Frankfurt neighborhood. Thus, renovations and new construction are the rule rather than the exception for the bustling facility. Within the last four years, construction projects have snowballed, including extensions to the surgical departments and renovations of existing buildings. Work on the basement, which will house outpatients from internal medicine, is currently entering its final phase. The dedication is planned for the end of 2014. In the in-patient areas, two-bed room standard continues to be implemented consistently. Patients can expect modern spaces and bathrooms in the near future.

Frankfurt University Hospital

  • Electrical Power Supply
  • Fuse Protection is Critical
  • Testing per VDE 0100 – Fast and Safe

Electrical Power Supply

Imtech GmbH & Co. KG was awarded the contract to work on the electrical installations in the central area of Building 23. This power and building technology company has more than 5,000 employees and constructs its own control cabinets at its facility in Illingen, Germany. The Imtech facilities in Frankfurt and Illingen collaborated closely on the University Hospital project. In all, 200 distribution boards were built, installed on site and connected to the hospital’s systems. Design and construction of the distribution boards occurred at Imtech’s Illingen manufacturing facility. The connection-ready distribution boards were delivered, installed and connected by the workers from Imtech’s Frankfurt office. In addition to the distribution boards that were installed in specialized utility rooms, nearly 80 ceiling-mounted distribution boxes were required for integration into the building’s suspended ceilings. These were also manufactured in Illingen, then installed and cabled on site.

Every device in the building is supplied with electrical power from these wiring distribution boards. In addition to general facilities, like administrative offices and doctors’ and nurses’ offices, these also include patient rooms, as well as operating rooms and treatment rooms. The latter areas include X-ray machines, lasers and other medical devices that need electricity. The ceiling-mounted distribution boards are equipped with WAGO’s 2002-3217 TOPJOB® S Through Terminal Blocks, which enable a change in conductor size from 4 mm2 (12 AWG) to 2.5 mm2 (14 AWG). With a conductor size of 2.5 mm2 (14 AWG), the maximum permissible conductor length is only 25 m. Since the distances between the distribution boards and loads are often longer, the conductor size must be adjusted in the ceiling-mounted distribution boards. This highlights an important benefit: ease of wiring. Since the electricians must perform overhead cabling work while standing on scaffolding, rail-mount terminal blocks equipped with push-in connection technology are extremely advantageous.

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