Ring Main Unit

Ring Main Unit with Enclosure（RMU SF6）

Brand: HENGFENGYOU
Series: Ring main unit
USES: High security, high reliability of urban high voltage ring network distribution solutions
Country of origin: China
Terms of payment: L/C, T/T, Western Union, Paypal, Money Gram
Certification: ISO9001、CB、CE、KEMA

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Ring Main Unit with Enclosure（RMU SF6） overview

- Galvanized sheet and stainless steel box are used for opening and closing. Expansible unit ring net cabinet or fully enclosed and insulated compact sulfur hexafluoride gas filling cabinet are installed inside

- Application: Widely used in power plants, power grids, petrochemical, metallurgy, industrial and mining enterprises, urban infrastructure

- Formulated standard: IEC60298

11kv ring main unit price, ring main unit price

Ring Main Unit with Enclosure（RMU SF6） advantage

> Leading technology

- Standard anti-corrosion and salt spray environmental plan to meet the stringent environmental requirements of the site

- Vacuum circuit breakers and sulfur hexafluoride ring mesh cabinets can be formed or all sulfur hexafluoride ring mesh cabinets can be used

- Prefabricated touchable silicone rubber cable end, to ensure personal safety

- Can be equipped with multiple SF6 load switches, flexible connection mode, branch and outlet up to eight circuits

- Compact design, optional arrester, short circuit fault indicator.

Current limiting fuse

- The relative pressure of SF6 in the capsule should not exceed 1.4bar.

Air leakage is not more than 1%/ year, maintenance free for 30 years

- Box type opening and closing should be equipped with a perfect five-prevention interlock function to ensure personal safety

> Enclosure

- The overall use of 1.5-2mm double-layer stainless steel box, the service life can reach more than 30 years

- Laser numerical control equipment cutting, drilling, bending, to ensure the processing accuracy

- The exterior is coated with electrostatic epoxy powder, which will not take off paint for 30 years

- The surface of the box has good anti-theft property, and the box has IP3X protection

> Processing and assembly

- Dust-free workshop to ensure insulation

- Assembly workers have been trained for at least 6 months

- The secondary connection is automatic terminal crimping machine to ensure reliable connection

- Use power tools to ensure proper torque for bolting reinforcement

- The copper bus is CNC cutting, punching and bending to ensure the accuracy

- All kinds of experimental tests before delivery to ensure the normal operation of the equipment

Ring Main Unit with Enclosure（RMU SF6） parameters

Our Advantages

- Authoritative product certification: ISO CE, CB, CCC, etc

- Perfect SQA quality management system to ensure high quality products

- Quick quotation, can provide electrical design services

- The delivery period is short, and the fastest delivery time is 15 days worldwide

- Perfect after-sales service system, so that customers buy worry-free

- Welcome customers to visit the factory guidance, provide OEM/ODM protection level

Ring Main Unit with Enclosure（RMU SF6）FAQ

What is an SF6-insulated Ring Main Unit (RMU)?
An SF6 RMU is a compact, gas-insulated switchgear unit used for medium-voltage power distribution, typically in ring or radial networks.
What voltage levels does the RMU SF6 support?
Standard voltage ratings range from 12kV to 24kV, with some models extending up to 40.5kV.
Why is SF6 gas used in RMUs?
SF6 provides excellent insulation and arc-quenching properties, allowing for smaller, safer, and more reliable switchgear.
Is the RMU enclosure weatherproof?
Yes, the enclosure is typically IP67-rated, providing dust, water, and corrosion resistance for outdoor installations.
What switching functions does the RMU support?
Common functions include load-breaking, fault isolation, and transformer protection, with options for manual or motorized operation.
Does the RMU SF6 require regular maintenance?
Minimal maintenance is needed due to the sealed SF6 gas system, but periodic leakage checks and gas pressure monitoring are recommended.
Can the RMU be integrated with smart grid systems?
Yes, advanced models support remote monitoring, SCADA communication, and IoT-enabled condition monitoring.
What safety features are included?
Features may include pressure relief devices, SF6 density monitors, mechanical interlocks, and earthing switches.
How long is the service life of an SF6 RMU?
With proper maintenance, the expected lifespan is 25-30 years, depending on operating conditions.
Are there eco-friendly alternatives to SF6 in RMUs?
Some manufacturers offer SF6-free alternatives using vacuum interruption and solid/dry insulation for reduced environmental impact.