Gas-insulated medium-voltage switchgear 8DJH 24 – blue GIS

Voltage up to

24 kV
  • Short-time withstand current up to 21 kA

  • Rated current up to 630 A

  • Ring-main-unit



Product information

8DJH 24 - blue GIS

Gas-insulated switchgear type 8DJH has been an integral part of the secondary medium-voltage portfolio at Siemens for more than ten years. The 8DJH portfolio has now been expanded by the 8DJH 24 - blue GIS. Just like all other switchgear types of the Siemens “blue” portfolio, this switchgear also uses the insulating medium Clean Air, which exclusively consists of natural elements of the ambient air and is free of F-gases. In combination with the innovative technology of the blue Switch, it offers all advantages of a gas-insulated switchgear at the same time.

Features of blue GIS

blue Switch

blue Switch

The centerpiece of the 8DJH 24 switchgear is the innovative “blue Switch”, a three-position switch-disconnector with vacuum interrupter in the secondary path, which does not produce any toxic decomposition products during the switching process. Thus, the dielectric strength of the gas remains constant throughout the entire service life, ensuring environmentally friendly disposal of the switchgear at the end of the lifecycle. The blue Switch is used in ring-main panels and – in combination with fuses – in transformer panels. The simple, reliable and well-known operating principle – close, open, earth – of the 8DJH product family is carried on within the blue GIS portfolio, and therefore ensures continuity.

Description of 8DJH 24

- Ring-main-unit up to 24 kV, 21 kA and 630 A

- Gas-insulated

- Hermetically enclosed

- Type-tested switchgear according to 
  IEC 62271-1/-100/-102/-103/-200


Clean Air

    - F-gas-free
    - Global warming potential < 1
    - Highly stable
    - Non-toxic
    - Non-flammable
    - For every application temperature

Customer benefits

   - Familiar operating concept for switchgear
    - Environmental independence
    - Compact design
    - Maintenance-free design
    - Personal safety
    - Security of operation, reliability
    - Economy, ecology


8DJH 24 - blue GIS: Discover your benefits

blue GIS meets the expectations of the Siemens customers further on, for example, with respect to switchgear availability, maintenance-free design, personal safety, compactness, and environmental independence. Clean Air consists of the natural elements of the ambient air and is therefore free of F-gases, with a global warming potential <1, highly stable, non-toxic, non flammable, and suitable for every application temperature.