MV SF6 Gas Insulated Ring Main Unit for PV stations-24kV

This 24kV SF6 gas insulated RMU is medium voltage primary distribution switchgear. SF6 acts as insulation and arc-extinguishing medium. All live components and busbars are fully sealed in stainless steel gas tanks.The gas tank reaches IP67 protection grade and the cabinet reaches IP4X.

Equipped with standard 5-type anti-misoperation interlock and independent pressure relief channels to prevent misoperation and internal arc hazards.Fixed and extendable modular designs are optional, supporting front and side cable wiring. Electric operation and remote monitoring modules can be equipped for smart grid construction.

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Core Features

• Stable SF6 Insulation：Pass IEC 62271-200 dielectric tests. Filling pressure 0.04MPa under 20 degree Celsius, annual gas leakage no more than 0.01 percent.
• Compact Modular Design：Supports ring and radial power distribution, flexible wiring for compact substations and industrial projects.
• Full Safety Protection：Anti-misoperation interlock, IP67 sealed tank and pressure relief duct. Optional SF6 leakage monitor, compliant with IEC 62271-1 safety standards.
• Long Maintenance-free Lifespan：Sealed tank isolates dust and moisture. Max 10000 cycles for circuit breakers/load switches and 3000 cycles for disconnectors/earthing switches, over 20 years maintenance-free service.
• Excellent Short-circuit Resistance：1250A rated current at 50/60Hz, with 25kA breaking current, 25kA 4-second short-time withstand current and 63kA making current, up to 30 breaking cycles.
• Eco & Cost Efficient:Recyclable SF6 gas with low power consumption to reduce full-lifecycle operating costs.

Main Technical Parameters

Isolation circuit breaker cabinet Scheme 

Normal Service Conditions

• Applicable altitude: 1000 to 4000 meters
• Ambient temperature: minus 40 degree Celsius to plus 45 degree Celsius
• Relative humidity: daily average no more than 95 percent, monthly average no more than 90 percent
• Seismic resistance: withstand Grade 8 earthquake intensity