What is secondary gas-insulated switchgear (GIS)?
Secondary GIS are key components of medium voltage substations designed for MV applications from 12 kV to 40.5 kV. They use gas as the insulation medium between live components in a sealed-for-life design.
What are benefits of secondary GIS?
- Compact design and modular structure save space and suit diverse environments.
- Robust and reliable performance.
- Reduced maintenance needs.
- Enhanced safety with internal arc protection and monitoring systems to help protect equipment and operators
Secondary GIS is used in urban distribution networks, industrial sites, renewables, critical infrastructure, data centers, airports, and public transport systems.
What are Ring Main Units (RMUs)?
RMUs are secondary GIS at load connection points in ring-type distribution networks. Our IoT-connected RMUs offer simple solutions with added benefits.
Ranges
RM AirSeT™
SF6-free Gas Insulated Medium Voltage Switchgear up to 24 kV SF6-free GIS ring main unit (RMU) and modular MV switchgear for secondary distribution applications up to 24 kV.Part of SeT SeriesView Details 
RM6
Medium Voltage Ring Main Units up to 24 kV Ring Main Units up to 24 kV, rated short-time withstand current up to 21 kA ,rated for Internal arc up to 20 kA AFLR with optionsPart of SeT SeriesView Products 
Ringmaster
MV Compact Switchboard (Ring Main Unit) up to 12 kV Hi-reliable Gas Insulated Switchboard for underground secondary distribution. For indoor and outdoor applications, up to 12 kVPart of SeT SeriesView Details
