Ring Main Unit

3 Way Semi-Insulating Ring Main Unit (SF6)

Brand: HENGFENGYOU
Series:
USES:
Country of origin: China
Terms of payment: L/C, T/T, Western Union, Paypal, Money Gram
Certification: ISO9001、CB、CE

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3 Way Semi-Insulating Ring Main Unit (SF6) ovievw

- 3 Way Semi-Insulating Ring Main Unit (SF6)，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

3 Way Semi-Insulating Ring Main Unit (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

3 Way Semi-Insulating Ring Main Unit (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

3 Way Semi-Insulating Ring Main Unit (SF6) FAQ

What is a 3-Way Semi-Insulating Ring Main Unit (RMU)?
It is a compact, SF6-insulated switchgear unit designed for ring-type power distribution networks, featuring three connection points for load switching and fault isolation.
What are the main applications of this RMU?
It is commonly used in secondary distribution networks, renewable energy systems, industrial plants, and urban power grids requiring reliable load switching and protection.
What voltage ratings does this 3-way RMU support?
Typical voltage ratings range from 12kV to 24kV, with some models extending up to 36kV, depending on regional standards.
Why is SF6 gas used in this RMU?
SF6 provides excellent insulation and arc-quenching properties, ensuring compact design, high reliability, and minimal maintenance.
Does this RMU support remote monitoring and control?
Yes, it can be equipped with smart sensors and SCADA-compatible interfaces for real-time monitoring, fault detection, and remote operation.
What type of switching operations can it perform?
It supports load-breaking, fault isolation, and busbar switching, with options for manual, motorized, or fully automated operation.
Is the RMU maintenance-free?
SF6-insulated RMUs require minimal maintenance, but periodic checks for gas pressure, leakage, and mechanical components are recommended.
What safety features are included?
Features may include pressure relief devices, interlocking mechanisms, and fault indicators to prevent unsafe operations.
Can it be installed outdoors?
Yes, it is designed with weatherproof enclosures (typically IP65 or higher) for both indoor and outdoor installations.
What are the advantages over traditional air-insulated RMUs?
Compact size, higher reliability, reduced environmental impact (with proper SF6 handling), and better performance in harsh conditions.