SF6 Gas-insulated RMU Ring Main Unit

• Superior SF6 Insulation Performance: SF6 gas provides exceptional dielectric strength and arc-extinguishing capabilities, ensuring stable operation in medium-voltage environments (typically 12kV, 24kV, etc.). It effectively blocks current leakage, minimizing risks of short circuits and flashovers to guarantee grid reliability.​
• Compact and Space-Saving Design: The sealed, integrated structure reduces overall size significantly, making it ideal for space-constrained installations such as indoor substations or urban areas with limited land. It simplifies on-site layout and improves land utilization.​
• Enhanced Safety and Reliability: Equipped with comprehensive mechanical and electrical interlocks to prevent misoperations (e.g., incorrect switching or grounding). Built-in SF6 gas leakage monitoring systems provide real-time alerts, complying with international safety standards and ensuring safe operation and maintenance.​
• Low Maintenance and Long Lifespan: The hermetic enclosure isolates internal components from dust, moisture, and corrosive elements, reducing wear and tear. This design enables long-term maintenance-free operation, with a service life of up to 20 years, lowering lifecycle costs.​
• Flexible Adaptability: Supports multiple wiring configurations (e.g., ring network, radial distribution) and can be seamlessly connected with transformers, cables, and other equipment. It accommodates diverse grid topologies, meeting varying power distribution needs in industrial, commercial, and utility scenarios.​
• Environmental and Economic Balance: SF6 gas is recyclable and reusable, minimizing resource waste. Its high efficiency and durability reduce energy loss and equipment replacement frequency, balancing environmental responsibility with long-term economic benefits.

Working conditions

• Ambient temperature: upper limit +40°C, lower limit -25°C.
• Altitude: the altitude does not exceed 2000m.
• Relative temperature: the daily average is not more than 95%; the monthly average is not more than 90%.
• Surrounding environment: the surrounding air is not obviously polluted by corrosive gas or combustible gas, water vapor, etc.
• No frequent violent vibration.