Yes, the industry is moving toward SF₆-free solutions. But for applications demanding the highest fault currents, compact footprints, and decades of proven reliability, the 8DN9 remains a gold standard. Siemens continues to support it with spare parts, training, and digital upgrades, ensuring that 8DN9 installations commissioned today will still be operating efficiently in 2050.
The is a compact, maintenance-free, gas-insulated medium-voltage switchgear (GIS) designed for secondary distribution networks (up to 24 kV). It is part of Siemens’ "blue GIS" portfolio, meaning it uses Clean Air (vacuum switching technology with natural-origin insulating gas) instead of sulfur hexafluoride (SF₆). The 8DN9 is optimized for renewable energy integration (wind, solar), industrial power supply, and utility substations where space is constrained and environmental regulations are strict. siemens 8dn9