At the Heusenstamm substation, an existing 110 kV system was comprehensively modernised – integrated into a shared switchgear building in an environmentally friendly, compact and efficient manner.
The aim was to completely convert the 110 kV outdoor switchgear to SF6-free, gas-insulated technology. At the same time, the existing 20 kV medium-voltage level was to be integrated and both switchgear systems were to be combined in a common switchgear building – without interrupting operations.
The new SF6-free GIS system forms the heart of the modernisation. The outdoor switchgear has been expanded and converted to a gas-insulated design – with future-proof technology, greater operational reliability and reduced space requirements.
Both voltage levels – 110 kV and 20 kV – were housed in a single switchgear building. The existing building structure was deliberately reused in order to save costs, space and construction time.
Rensys developed the technical concept, created all circuit diagrams and layout plans in AutoCAD, and shared them continuously via SharePoint. Weekly consultations with the customer ensured that every requirement was implemented precisely.
The project was implemented efficiently – despite its structural and planning complexity. The GIS system was successfully integrated, all technical requirements were met, and the documentation was professionally prepared. The newly structured project filing system and clearly defined communication channels ensured that everything ran smoothly – with complete transparency for the customer.
With the conversion of the switchgear in Heusenstamm, Rensys sent a clear signal for sustainable energy infrastructure. The use of SF6-free technology, the utilisation of existing building fabric and close customer communication resulted in a modern solution – environmentally friendly, compact and reliable for tomorrow’s grid operation.
