SF6 Gas-insulated RMU Ring Main Unit 12kV

This SF6 gas insulated ring main unit, fully complying with IEC 62271-200 and IEC 62271-103 international standards.
All live conductive components are encapsulated in airtight 304 stainless steel gas tank, with SF6 acting as insulation and arc-extinguishing medium. The equipment adopts independent three-compartment layout (busbar compartment, gas switch compartment, cable compartment), equipped with integrated three-position load switch and earthing switch. Standard C/F/V functional modules can be freely combined to form ring, radial and sectionalized medium voltage distribution networks.
The compact vertical split cabinet structure matches the physical picture, suitable for indoor box substations, urban narrow distribution stations and commercial power distribution projects, realizing reliable switching, fault isolation and overcurrent protection for 12kV grids.

Core Standard Features

• Reliable SF6 Hermetic Insulation：Fully welded stainless steel gas tank with annual SF6 leakage rate ≤0.03%, equipped with gas density monitor for real-time internal pressure monitoring, avoiding insulation breakdown caused by gas loss.

• Modular Three-Compartment Safety Layout：Independent partition design for busbar, switching and cable chambers, with optional IAC internal arc resistance structure to meet IEC anti-arc safety requirements.

• Complete 5-Way Mechanical & Electrical Interlock：Standard five-prevention interlock mechanism prevents misoperation of switch, earthing device and cabinet door, fully conforming to IEC safety operation specifications.

• Maintenance-Free Long Service Life：Sealed gas chamber isolates dust, moisture and corrosive gas; 20-year design life without regular gas refilling, mechanical operation life up to 5,000 cycles.

• Wide Global Grid Compatibility：Supports 50Hz & 60Hz dual frequency, compatible with overhead cable incoming/outgoing, transformer protection and distributed new energy power supply systems.

• Intelligent Expansion Reserved：Reserved installation space for DTU remote monitoring unit, CT/PT measuring components for feeder automation upgrade.

Technical Specification

Application Scenarios

• Urban residential ring distribution networks

• Industrial parks, mining and manufacturing power supply

• Shopping malls, high-rise buildings and commercial complexes

• Photovoltaic & wind power new energy collection stations

• Indoor compact kiosk substations and box transformers

• Municipal public infrastructure medium voltage power distribution