+86 15657752999
0102030405
24KV Ring Main Units for MV System Electric Distribution - Reliable Solutions from China Suppliers & Factory
Product Advantages
Our Ring Main Units are designed for maximum safety, reliability, and ease of operation.
π²
Compact & Modular Design
Saves critical space in tight urban substations, commercial basements, or wind turbine foundations. The modular design allows for flexible configurations and future expansion.
π‘οΈ
Advanced Insulation Technology
Available in SF6 Gas Insulated and Environmentally Friendly Dry Air/Vacuum options, offering superior arc-quenching and insulation in a sealed, maintenance-free environment.
π
Fully Sealed & Maintenance-Free
The live parts are enclosed in a stainless steel or robust polymer tank, protected from moisture, dust, salt, and other environmental contaminants, drastically reducing maintenance needs.
β‘
Enhanced Safety Features
Earthing Switch and Visible Isolation ensure operator safety during maintenance. Fault indicators and remote monitoring capabilities provide real-time system status.
βοΈ
Load Breaking & Fault Making Capability
Equipped with advanced vacuum interrupters or SF6 technology for reliable switching of load currents and safe closure onto faults.
π§
Easy Installation & Integration
Pre-assembled, tested, and ready for connection, reducing on-site labor and commissioning time.
Primary Applications
Our RMUs are versatile and critical for a wide range of distribution scenarios:
- ποΈ Secondary Distribution Substations in urban and residential areas
- π Industrial Plants & Manufacturing Facilities
- π’ Commercial Complexes, Hospitals, and Data Centers
- π± Renewable Energy Integration (Wind Farms & Solar Parks)
- βοΈ Infrastructure Projects (Airports, Railways, Tunnels)
- βοΈ Mining and Offshore Applications
Types of Ring Main Units We Offer
We provide tailored solutions to meet specific network requirements and environmental preferences.
- SF6 Gas SF6 Gas Insulated RMU: The industry standard for compactness and proven performance, offering excellent dielectric and arc-quenching properties.
- Vacuum Vacuum Insulated RMU: Utilizes vacuum interrupters for load switching, housed in a sealed tank, often with dry air as the main insulation for an eco-friendly profile.
- Solid Solid Insulated RMU (SIR): Uses solid epoxy insulation for enhanced environmental safety and an extremely compact footprint.
- 2-Way Compact RMU (2-Way): Standard two-way units for simple T-off points in the ring.
- 3/4-Way Fully Equipped RMU (3-Way or 4-Way): Include circuit breakers or combined switch-fuse units for comprehensive feeder protection.
Our Quality Commitment
We deliver products you can trust. Our Ring Main Units are:
- β Designed and tested in accordance with IEC, IEEE, and other major international standards.
- β Manufactured in state-of-the-art facilities with rigorous Quality Control.
- β Backed by global technical support and service expertise.
Frequently Asked Questions (FAQ)
β What is a Ring Main Unit (RMU) and how does it work?
A Ring Main Unit (RMU) is a compact, factory-assembled switchgear device used in medium-voltage distribution networks. It connects multiple cable feeders in a ring configuration, allowing power to be rerouted in the event of a fault, thereby ensuring continuous supply to end users. It typically includes load break switches, circuit breakers, and earthing switches housed in a sealed enclosure.
β What is the difference between SF6, Vacuum, and Solid Insulated RMUs?
SF6 Gas Insulated RMUs use sulfur hexafluoride gas for arc-quenching and insulation β a proven, compact solution. Vacuum Insulated RMUs use vacuum interrupters for switching, often combined with dry air insulation for a more environmentally friendly design. Solid Insulated RMUs (SIR) use epoxy resin insulation, eliminating the need for any gas, offering the most eco-friendly and compact option available.
β Are your Ring Main Units suitable for outdoor and harsh environments?
Yes. Our RMUs feature fully sealed stainless steel or robust polymer enclosures that protect all live components from moisture, dust, salt spray, and extreme temperatures. They are suitable for outdoor substations, coastal environments, underground vaults, tunnels, and offshore installations.
β What international standards do your RMUs comply with?
Our Ring Main Units are designed and tested in accordance with major international standards including IEC 62271-200, IEC 62271-100, IEC 62271-103, and IEEE standards where applicable. Each unit undergoes rigorous type tests and routine tests before delivery to ensure full compliance and reliability.
β Can RMUs be integrated with remote monitoring and SCADA systems?
Absolutely. Our RMUs can be equipped with fault indicators, motor-operated actuators, and communication interfaces (IEC 61850, DNP3, Modbus) to enable full integration with SCADA and Distribution Management Systems (DMS). This supports remote switching, real-time status monitoring, and automated fault isolation.
β How long is the typical service life of a Ring Main Unit, and what maintenance is required?
Our Ring Main Units are designed for a service life of 30 years or more under normal operating conditions. Thanks to the fully sealed, maintenance-free design, routine maintenance requirements are minimal. Periodic visual inspections and functional checks are recommended, but no internal servicing or gas refilling is typically required throughout the product's operational life.
Inquire Now!
If you have any needs, please feel free to contact me and I will be happy to serve you.