What Is a Ring Main Unit? Why Choose Derui Electric’s Ring Main Units?
A Ring Main Unit (RMU) is a critical switching device in ring network power supply systems. It refers to the switchgear installed on each distribution branch, whose busbars form part of the ring-shaped main line simultaneously. A complete ring distribution network is established by connecting the busbars of multiple outgoing cabinets.
As a core device in the medium and high-voltage distribution field, RMUs feature oil-free and compact designs. Ring Main Unit and Switchgear They are compatible with distribution systems of different voltage classes ranging from 10kV to 40.5kV. The core components include switch assemblies, insulation parts and intelligent monitoring modules; high-end products are integrated with DTU (Distribution Terminal Unit) intelligent sensing components.
- Functions of Ring Main Units
- Core Power Supply GuaranteeRMUs：are responsible for making and breaking load currents, interrupting short-circuit currents, isolating circuits and providing reliable grounding, ensuring stable power distribution.
- Improve Power Supply ReliabilityThrough：the ring network, RMUs realize mutual power supply between lines and load distribution. When a fault occurs, the faulty section can be quickly isolated, and power supply can be continued from the other side, significantly shortening power outage time and reducing losses Rmu Electricity.
- Support Intelligent Management：and ControlSome intelligent models support the "Three Remote Functions" (remote measurement, remote signaling, remote control) and multiple communication protocols, enabling automated intelligent management and control of distribution networks and reducing operation and maintenance costs.
2.Application Scenarios of Ring Main Units
- Urban Civil FieldIn ：urban core business districts and high-rise residential communities, RMUs can be installed in narrow spaces such as underground garages and the ground floors of buildings, meeting fire safety and space utilization requirements as.
- Industrial Production FieldIn：industrial parks and industrial zones, RMUs are compatible with distribution transformers of 1250KVA and below, ensuring continuous power supply for small and medium-sized enterprises as.
- New Energy FieldIn ：wind and photovoltaic power stations, RMUs are used for power collection and transmission, and their stable insulation performance makes them suitable for outdoor environments.Key Infrastructure FieldIn：airports, railways, ports and other key infrastructure, RMUs ensure the stable operation of distribution systems, supporting the normal operation of core functions.
- Urban and Rural Power Grid TransformationIn：urban and rural power grid upgrading projects, RMUs improve the reliability of grid power supply and meet diversified power supply needs as Ring Main Unit power supply equipment.
1.Compact Structure, Minimal Footprint
Derui Electric adopts a modular design concept, resulting in a compact overall size. There’s no need to build separate large distribution rooms—our units can be directly installed in outdoor green belts, beside sidewalks, or on the ground floors of buildings. This greatly saves land resources and infrastructure costs, making them ideal for the dense layout requirements of urban power grids.
- Fully Insulated & Sealed Design, ring main units High Safety and ReliabilityKey
Internal components of Derui Electric’s ring main units are encapsulated with fully insulated and sealed technology, effectively isolating erosion from harsh environmental factors such as dust, moisture, and salt spray, while avoiding risks like short circuits and electric leakage. Equipped with anti-misoperation locking devices, they fundamentally ensure the personal safety of operation and maintenance personnel. These outdoor high-voltage Ring Main Units can operate stably in a wide temperature range of -40℃ to +70℃ Outdoor High-Voltage Ring Main Unit.
- Easy Operation, Low O&M CostsEquipped
With an integrated manual/electric operating mechanism, the switch’s opening and closing actions are smooth and flexible, requiring no complex debugging. The equipment has a long service life, with a maintenance interval of over 10 years. Only regular inspections are needed daily, significantly reducing labor and material costs for operation and maintenance.
- Strong Expandability, Adaptable to Multiple Grid ScenariosOur
Professional technical team supports free combination of multiple circuits. We can flexibly add metering, protection, communication, and other modules based on actual power supply needs, easily enabling wiring methods such as ring network power supply and radial power supply. These ring network power supply devices meet the power supply transformation needs of various scenarios, including industrial parks, residential communities, and commercial complexes Rmu Electricity.