Ring main unit for smart grids | SEIL
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    Smart Grid - Bring Innovation to Every Level

Energy consumption is increasing day-by-day, and the same is true for the expectations of energy consumers who want more reliable and environment friendly energy solutions. To meet these expectations, the fundamental way of energy production, distribution and consumption has to change. A grid is the glue between energy supply and demand, and every grid downtime can severely impact the businesses, large or small, relying on it. For managing smarter demand and smarter supply, and reducing the downtimes in-between, smart grids are needed.

Take for example the concept of self-healing smart grids. These grids comprise of sensors, communication mechanisms, automated controls and advanced software to manage operational security even if abnormalities occur in the system. These self-healing smart grids are capable of identifying and troubleshooting minor and major faults with little or no human activation.

Therefore, tools like smart grids minimise the costs related to service failures and also isolate external attempts to interrupt the power supply. New smart grid enabled utility operation includes technologies that are designed to support fluctuating demand.  Smart grid components include, 

          -  Wide area networks, communications and security infrastructure 
          -  Advanced metering infrastructure (AMI) 
          -  Meter Data Management (MDM) system 
          -  Distribution Automation
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One solution, comprehensive capabilities

Seamlessly integrated with the Easergy T300 remote terminal unit (RTU), the smart ring main unit (RMU) is an innovative solution that makes it easier for you to answer the evolving challenges of electrical distribution. An all-in-one solution, the smart RMU is easy to purchase, install, and maintain, helping to reduce operational costs. Its robust design fits even harsh environments.
  • Take charge of your grid evolution

    Explore the key features of the smart ring main unit and learn how it can help you transform your network into a future-ready grid.

    Download the brochure
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  • Take a closer look

    Zoom into the smart ring main unit (RMU) to see its fully integrated sensors for voltage, power, current, and temperature monitoring.

    Discover the smart RMU in 3D
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  • Stay in touch with Ringmaster at any time

    Delve into hi-reliable gas-insulated switchboard solutions for underground secondary distribution, no matter where you are. With the eCatalog 3D Power app, you can explore the Ringmaster technology easier than ever.

    Download now from App Store (only on Ipad) or Google Play
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The cornerstone of a smart grid

Discover how smart RMUs are introducing smart-grid capabilities into MV/LV substations.

Why choose our smart RMU

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    Improved energy availability

    Reduce outage time by detecting faults early and automatically reconfiguring the network afterward. Integrate intermittent and distributed generation smoothly to maintain energy quality and stability.

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    Optimized network performance

    Get your grid ready for growing energy demand. With advanced analytics, you can optimize asset management, manage load shedding and peak shaving, and reduce technical and non-technical losses.

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    Enhanced cybersecurity

    Enjoy the advantages of grid connectivity without worrying about the security of your data. The smart RMU is compliant with IEC 62351, IEEE 1686 role-based access control (RBAC), and Achilles Practices.

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    Time and cost savings

    Quick and easy to install, the smart RMU enables you to save time on implementation. Thanks to condition-based maintenance and simplified IT management, you can also reduce your operational costs.

  • See the new world of energy in 3D+E Discover how digitization, decarbonization, and decentralization are transforming the energy world.
  • Improve grid reliability with EcoStruxure‚ĄĘ Find out how our solutions help SA Power Networks deliver reliable power in extreme conditions.


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  • Tools icon Reduced maintenance costs with smart sensors for substation monitoring
  • < 60 s Faster power restoration thanks to decentralized schemes
  • $ A cost and time effective solution to improve energy availability (SAIDI)
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  • Earth icon Expertise of the RMU market leader with +2.5 M installations worldwide

Discover products featured with the smart RMU