As global power utilities accelerate the phase-out of SF6—a greenhouse gas with a global warming potential (GWP) 23,500 times higher than CO2—Solid Insulated Switchgear (SIS) has emerged as the premier green alternative for medium-voltage distribution networks (6kV to 12kV).
Why Traditional SF6 RMUs Struggle in Harsh Climates
Traditional Gas-Insulated Switchgear (GIS) relies on pressurized sulfur hexafluoride (SF6) gas for both insulation and arc quenching. However, in regions with severe temperature swings, SF6 faces critical physical limitations:
- Extreme Cold Winters (Russia, Northern Eurasia): When temperatures drop below -30°C to -40°C, SF6 gas can liquefy under operating pressure. Liquefaction causes a steep drop in gas density, severely compromising dielectric withstand capability and tripping pressure alarms.
- Extreme Desert Heat (Middle East, GCC): Sustained ambient temperatures above +45°C combined with direct solar radiation accelerate seal aging and gas leakage, requiring frequent on-site pressure monitoring and costly gas refilling.
The Engineering Advantage of Solid Insulated Switchgear
In AIKEY Ultima Solid Insulated Switchgear, the vacuum interrupter, disconnector blade, and main busbar connections are completely embedded in solid epoxy resin (solid-sealed pole technology). This architecture delivers key technical breakthroughs:
- 100% SF6-Free & Zero Greenhouse Gas: Completely exempt from environmental carbon taxes and fluorinated gas tracking regulations.
- IP67 Environmental Protection for Live Parts: All primary live conductors are completely encapsulated, impervious to flood submersion, salt spray condensation, desert blowing sand, and industrial chemical fumes.
- Operating Stability from -40°C to +45°C: Solid dielectric material retains consistent insulating strength regardless of atmospheric temperature and pressure fluctuations.
- Modular Phase-Segregated Design: Eliminates phase-to-phase short circuit risks within the switchgear enclosure.
Conclusion & Project Application
For utility grids, wind farms, subway traction networks, and coastal petrochemical hubs, SIS provides a true zero-maintenance, zero-gas lifecycle solution. Contact AIKEY Power engineering team for complete SIS type test reports and dimensional drawings.