Gas-insulated medium-voltage switchgear for primary distribution

The Siemens 8DA and 8DB range of fixed circuit-breaker switchgear for indoor installation comprises several factory-assembled, type-tested, models of compact gas-insulated medium-voltage switchgear. All models are single-pole metal-enclosed and equipped with metallic partitions to ensure reliable operation and a high degree of personal as well as operational safety. The Siemens 8DA10 gas-insulated switchgear model is suitable for single-busbar applications. The Siemens 8DB10 gas-insulated switchgear model suits to double-busbar applications, the 8DA11 and 8DA12 single and double pole design is for traction power supply systems.

Gas-insulated medium-voltage switchgear up to 40.5 kV, 40 kA (3s)

  • up to 5000 A busbar, up to 3150 A feeder
  • Metal-enclosed
  • Single-busbar system
  • Hermetically enclosed
  • Factory-assembled, routine-tested according to IEC 62 271-200
  • Type-tested according to IEC 62 271-200


  • Safe, secure, and reliable operation
  • Personal safety
  • Environmental independence
  • Compactness
  • Maintenance-free design
  • Cost-efficiency
  • High environmental compatibility  

Official link at siemens.com