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Lucy Electric Ring Main Units (RMU) that meet varied evolving technical and functional needs of customers across the globe.

Ring Main Units

Lucy Electric Ring Main Units (RMU) that meet varied evolving technical and functional needs of customers across the globe.

Ring Main Units

Our vast range of ring main units are all suitable for both indoor and outdoor locations to operate in the most extreme environmental conditions. Oil insulated ring main units and gas insulated ring main units are the result of extensive innovation, using advanced technologies and are subjected to extensive testing and safety standards. 



Oil insulated RMUs

Oil insulated ring main units have been developed by Lucy Electric over a number of years and are now the leading performers in the global market for medium voltage switchgear.

Trident – Fuse switch ring main unit

For use in both rural and industrial settings, it can be positioned in the most extreme conditions: ambient temperatures from -10°C to 55°C, humidity of up to 100%, corrosive regions, oil fields and other hostile environments. This fused ring main unit range includes non-extensible, extensible and modular options.

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Gas insulated RMUs

Lucy Electric medium voltage gas insulated ring main units are characterised by their reliability, operational safety, and flexibility. Gas insulated RMUs are available vacuum circuit breakers or fuse switched ring main units.

Vacuum circuit breaker RMUs - SF6 gas insulated ring main units combining the most advanced vacuum switching technology:

Sabre ring main unit

Combining advanced vacuum circuit breaker technology, the Sabre ring main unit includes fully extensible and non-extensible options for secondary distribution applications up to 24kV.

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Aegis Plus ring main unit

Built from the strong foundations of the Aegis, the Aegis Plus ring main units are automation-ready units with integrated Remote Terminal Units (RTUs) in the form of the next-generation Gemini 3; enabling instant smart grid functionality.

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Aegis 36 ring main unit

Aegis 36 is Lucy Electric’s latest product, originating from the very successful Aegis Plus product family. It is specially designed for secondary distribution networks, wind farms and photovoltaic power stations with ratings up to 36 kV.

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Fuse switch RMU - Sf6 gas insulated side and rear fused ring main units for medium voltage switchgear applications:

Scimitar ring main unit

Available up to 17.5kV, the Scimitar fused ring main units are designed for harsh and demanding environmental applications. These medium voltage ring main units are fully type-tested at KEMA and IPH test laboratories and built to the highest standards to meet stringent customer requirements.

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