SF6 MV Ring Main Unit Switchgear for urban power grids-11kV 12kV

IEC-standard compact metal-enclosed SF6 ring main unit, compliant with IEC 62271-200 and IEC 62271-103, suitable for 11kV/12kV medium voltage distribution systems. Adopting fully sealed SF6 gas insulation and integrated load switch structure, it features reliable mechanical interlock, flexible modular combination and long-term maintenance-free operation, widely applied in automated urban and industrial power distribution networks.

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Key Features

• IEC Standard Insulation Performance：Fully compliant with international IEC standards. Sealed SF6 gas provides superior dielectric strength and stable arc extinction, effectively preventing high-voltage flashover, short-circuit and leakage faults to ensure safe and stable grid operation.

• Compact Modular Design：Miniaturized footprint with expandable modular structure, perfectly suitable for space-limited substations, commercial buildings and industrial parks, greatly improving space utilization.

• Dual Safety Protection：Complete mechanical and electrical interlock devices prevent misoperation; real-time SF6 gas pressure monitoring and low-pressure alarm function ensure safe operation and maintenance.

• Ultra-long Service Life & Low O&M Cost：Hermetically sealed gas chamber isolates dust, moisture and corrosive substances. Support 20+ years maintenance-free operation, effectively reducing whole life cycle cost.

• Strong Grid Adaptability：Supports both ring network and radial network power supply modes, adaptable for industrial, commercial, residential and public facility power distribution projects.

Technical Specifications 

Application Scope

Mainly used for secondary distribution in urban power grids, industrial zones, residential, medical, educational and commercial facilities as core medium voltage switching equipment.