Indoor Disconnecting Switch

The 12kV Indoor Disconnecting Switch is a three-phase, medium-voltage switching device engineered specifically as a core internal component for gas-insulated switchgear (GIS) and ring main units (RMU). Designed for indoor power distribution environments, it delivers robust isolation, load switching, and system protection functions within compact substation layouts.

Built to meet the demanding requirements of modern power networks, this disconnecting switch ensures safe and visible disconnection of circuits, enabling maintenance personnel to work with confidence. Its integration into GIS and RMU systems helps optimize space utilization while maintaining high operational reliability.

1. Provides a visible breaking gap that meets stringent safety requirements for disconnectors. The contact design minimizes arcing during opening and closing, extending electrical lifespan.
2. Optimized for internal mounting inside GIS and RMU tanks. The streamlined geometry reduces the overall footprint of the switchgear, making it ideal for urban substations, industrial facilities, and commercial buildings with limited space.
3. Rigorously tested for thousands of mechanical operations. The stainless steel shaft and silver-plated contacts ensure low contact resistance and resistance to environmental aging within the sealed gas compartment.
4. Fully compatible with SF₆ insulated systems or eco-friendly alternatives (e.g., N₂/SF₆ mixtures, clean air). Maintains stable dielectric performance under varying temperature and pressure conditions.
5. Integrated mechanical position indicator (open/closed) visible through the switchgear viewing window. Optional auxiliary contacts provide remote status signaling to SCADA systems.

• Gas-Insulated Switchgear (GIS) – As an incoming or outgoing line disconnector.
• Ring Main Units (RMU) – For transformer feeder isolation and cable loop switching.
• Secondary Distribution Substations – Up to 12kV indoor installations.
• Wind & Solar Power Collection Systems – Medium-voltage switching inside prefabricated substations.

• Proven reliability – Designed for the operating life of GIS/RMU equipment (typically 20+ years).
• Low maintenance – Encapsulated construction eliminates exposure to dust, humidity, and pollution.
• Fast switching operation – Spring-assisted mechanism ensures consistent opening/closing timing.
• Global compliance – Manufactured in accordance with IEC standards for international acceptance.

The switch is delivered as a pre-assembled module ready for integration into your switchgear manufacturing process. Technical documentation, 3D models, and testing reports are available upon request. Our engineering team provides installation guidance and on-site commissioning support for OEMs and system integrators.

Contact us for detailed datasheets or to request a sample unit tailored to your GIS/RMU design.

Enhance the safety and reliability of your medium-voltage distribution – with a disconnecting switch engineered for the heart of your switchgear.