Outdoor SF6 RMU Inflatable Cabinet
✅Excellent Outdoor Suitability,Fully Insulated & Sealed,IP67
✅Superior Electrical Performance,Reliable Arc Quenching
✅High Safety & Reliability
✅Compact Design & Flexibility
- Product Introduction
Outdoor SF6 RMU inflatable cabinet also called Outdoor SF6 Gas-Insulated Ring Main Unit (RMU) is a compact switchgear assembly designed for outdoor use, utilizing sulfur hexafluoride (SF6) as the insulation and arc-quenching medium.
Typically installed directly in outdoor locations such as streets, parks, and construction sites without the need for a separate substation building, it facilitates the reception, distribution, and control of electrical power. It serves as a core component in modern distribution networks, particularly in 10kV ring main supply systems.
Technical parameters:
| Basic Ratings | Rated Voltage | 12kV, 24kV, 40.5kV |
| Rated Frequency | 50Hz / 60Hz | |
| Rated Current | 630A, 1250A | |
| Insulation Level | Lightning Impulse Withstand Voltage (Phase-to-Phase/Earth) | 75kV, 125kV, 185kV |
| Lightning Impulse Withstand Voltage (Across Break) | 85kV, 145kV, 215kV | |
| Power Frequency Withstand Voltage (Phase-to-Phase/Earth) | 42kV, 64.9kV, 95kV | |
| Power Frequency Withstand Voltage (Across Break) | 50kV, 79kV, 110kV | |
| Power Frequency Withstand Voltage (1min) | 30kV | |
| Reverse Phase Withstand Voltage (1min) | 30kV | |
| Maximum Phase Voltage (5min) | 9kV | |
| Breaking & Making Capacity | Breaking Load Current | 630A |
| Rated Cable Charging Breaking Current | 25A | |
| Rated Line Charging Breaking Current | 16A | |
| Rated Short-Time Making Current | 50kA, 31.5kA | |
| Dynamic & Thermal Stability | Peak Withstand Current | 50kA, 31.5kA |
| Rated Short-Time Withstand Current | 20kA/2s, 40kA/2s | |
| Main Circuit Resistance | Main Circuit Resistance per Phase | ≤ 150 μΩ |
| SF6 Gas Parameters | Gas Relative Leakage Rate per Year | ≤ 1% |
| SF6 Gas Moisture Content (Factory Handover) | ≤ 150 ppm | |
| SF6 Gas Moisture Content (In Service) | ≤ 300 ppm | |
| Mechanical Life | Mechanical Stability Operation Times | 6000 times |
above parameters are typical value,contact us for more info
Usage conditions:
● Ambient temperature:- 10℃~40℃
● Altitude: ≤1000 meters
● Relative humidity: daily average relative humidity of less than 95% and a monthly average relative humidity of less than 90%
● Seismic intensity: seismic intensity
● Pollution level: the place without serious pollution, chemical corrosion and severe vibration
Product advantage:
Outdoor SF6 RMU inflatable cabinet has remarkable advantages:
① it has strong arc extinguishing ability and can quickly cut off the fault current to improve the reliability of power supply.
② its excellent insulation performance allows it to operate stably in harsh environments and reduces maintenance workload.
③ it occupies a small area, saving space and being suitable for areas with tight land use such as cities.
④ it has flexible expansion and combination capabilities, which can be easily expanded or modified according to needs to meet different power supply requirements and has good economy.
⑤ it also has good environmental adaptability and can resist certain natural disasters to ensure the safety of power supply.
Usage application:
● Urban Power Grids: Nodes in ring main supply systems along streets, in residential areas, and commercial centers.
● Infrastructure: Power supply systems for airports, ports, railways, and highways.
● Industry & Renewable Energy: High-voltage side of substations in wind farms and photovoltaic power plants; power intake for industrial and mining enterprises.
● Temporary Power Supply: Power supply assurance for construction sites and temporary event venues.
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