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Get all the benefits of our Ringmaster RN2d with the advanced communication and automation using Easergy T300:

  • New Ringmaster RN2d

    Ringmasters RN2d compact, robust design delivers reliable performance, both indoors and outdoors, from commercial applications to the harshest of industrial environments.
    RN2d has a high-level reliability, safety and flexibility. It is an SF6 Insulated Ring Main Unit (RMU) for medium voltage networks up to 13.8kV with improvement guided by customer feedback and design failure mode and effect analysis (DFMEA).

    Ringmaster RN2d range
  • Easergy T300 The new benchmark in power distribution automation.

    A modular platform of hardware and firmware, and an application building block for medium voltage and Low Voltage public distribution network management. It offers a single solution for control and monitoring, from a simple pole-top device to a large MV/ MV or MV/LV substation.

    Easergy T300 range
  • 30 years of Great British engineering

    Launched as the Ringmaster Ring Main Unit(RMU) in 1987, the Ringmaster was the first gas-insulated RMU on the UK market. 
    Traditional RMU's had been oil filled making them time-consuming to test and service. The first Ringmaster was safer, smaller, cleaner and easier to operate than the competition. 
    This produced efficiency savings for Schneider Electric's customers and set the standard for the future.

    Ringmaster RN2d range

    Ringmaster Summary

    Features RN2C RN2D (full version)
    New facia
    Enhanced DFMEA RSW Mechanism
    Enhanced through DFMEA CB Mechanism
    Bushing Type Short Short or Type C
    Internal Arc cable Box (13.1kA) 13.1kA - 21kA
    Internal Arc Enclsoure (21kA)
    Anti Theft Earth
    Quality Improvements
    ENA 41-38 Issue 3
    New Designation / No Saturation
    VIP 400
    • Transitioning to a Smart Grid How can you maintain power quality?

      With widespread integration of distributed energy resources along the network, Smart Grid capabilities are being introduced into MV/LV substations to maintain power quality and achieve greater service continuity.

      Read White Paper
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    Excellence Redefined

    • Reliable

      More robust Switch & Breaker mechanism

      Short (Type A) or Type C bushing 

      New VIP400 relay with advanced protection features

      Earth circuit re-designed for anti-theft 

      VPIS functioning from minimum of 6.6kV

    • Flexible

      Additional test access points for Switch function

      Improved front facia with easy to read mimic


      Easy to install & maintain

    • Safe

      Improved Internal Arc performance 

      Metalised screen tank offers touch proof feature

      Insensitive to harsh environment

      Complies to latest seismic standards

    • Digital

      New Easergy T300 FRTU for advanced communication

      MV/LV control & monitoring 

      Compact & modular, configurable to your needs

      Flexible communication media (ethernet, USB, GPRS, 3G, PSTN, Radio)

      Complies to latest cyber security standards

    Ringmaster RN2d features

    History of Ringmaster

    • 1970's

      Outdoor oil filled ring main unit using HRC fuse switch technology

    • 1987

      First gas-insulated Ringmaster Ring Main Unit (RMU)

    • 1998

      RN2c version launched

    • 2018

      Latest evolutions launched - RN2d, RN6d, RE2d & RE6d - reliable, safe, flexible and smart

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