As the largest grid operator for power, gas and water in the EnBW group, Netze BW has 83 locations across Baden-Württemberg, Germany, covering an area of approximately 17,700 km².

In conjunction with their ongoing research cooperation, Siemens Smart Infrastructure and Netze BW GmbH, have co-developed an intelligent and environmentally-friendly distribution substation. The core of the new station is a blue GIS 24 kV Ring Main Unit (RMU). It combines the Clean Air insulation medium, a mixture of natural, atmospheric gases, with proven and reliable vacuum switching technology. This eliminates the need for any fluorine-based gas mixtures (F-gas). With this we are setting a new standard for smart and eco-friendly energy distribution.

The innovative substation, which will connect the medium-voltage distribution grid and the low-voltage local grid in the town of Kreuzthal in the Oberallgäu region, is now being tested under real-life conditions.

We support our customer in creating an environmentally friendly power supply. By replacing several hundred switchboards in use on the secondary distribution level with the new 8DJH 12 that works without F-gas, we meet the requirements of RheinEnergie AG. The energy supply company which operates regionally and is situated in Cologne, Germany, relies with the 8DJH 12 - blue GIS on a future-proof and sustainable switchgear. In addition, it is not necessary to change the specifications for the stations, because the new switchgear has the same dimensions as the previous version.

As the owner of the power distribution grid and the associated electrical equipment, Stromnetz Berlin GmbH ensures the safe and reliable power supply to the German capital. With the innovative 8DJH 12, a switchgear using Clean Air as insulating was put into operation in a medium-voltage compact substation (10 kV) in Berlin-Siemensstadt. Clean Air consists only of natural components of the ambient air, with a GWP <1. Since the new switchgear has the same dimensions as the version with SF6, it is equally suitable for use in compact substations.

BKK Nett AS in Bergen, one of the most innovative Utilities in Norway, had a clear goal for a new MV switchgear for distribution substation: A compact ring main unit that would operate more sustainably, reliably and economically and could work at very low operation temperatures. Siemens had the complete solution: The 8DJH 12 - blue GIS switchgear is equipped with Clean Air and the reliable and proven vacuum interrupter technology, offering all advantages of a gas-insulated switchgear at the same time. The SF6-free and maintenance-free switchgear offers lower operating costs combined with a high degree of low-voltage equipment.

A power plant means a challenge in terms of operational reliability and availability for critical chemical processes and adverse environment conditions. With its experience and know-how as a service provider in the chemical industry, the Currenta GmbH has set new standards for this project with the MV switchgear solution of Siemens by installing and commissioning 8DAB 12 - blue GIS. A first step to the vacuum switching technology with Clean Air and F-gas-free insulation that offers more benefits for installation, operation and end of life treatment, and with a better impact on the environment.

The Mainsite GmbH & Co.KG is the operating company of the Industrie Center Obernburg.

With the 8DJH 12 blue GIS, the company has opted for a future-oriented system that will enable the expansion of the Mainsite industrial park.

The compact design, the use of the environmentally friendly insulating medium Clean Air and the advantages of gas-insulated switchgear technology such as independence from the climate and freedom from maintenance, as well as a coherent operating concept for the switchgear were important criteria here.