All Products Ring Main Units Our range of Ring Main Units (RMUs) are all suitable for both indoor and outdoor locations and are designed to operate in the most extreme environmental conditions. Both oil and gas insulated ring main units are the result of extensive innovation, using advanced technologies and are subjected to extensive testing and safety standards. What is a ring main unit? Click to find out Gas Insulated Ring Main Units Up to 24kV Side and Rear Cable Entry Sabre See product Up to 24kV Front Cable Entry Aegis Plus See product Up to 36kV Front Cable Entry Aegis 36 See product 17.5kV Side and Rear Cable Entry Fuse Switch Scimitar See product Oil Insulated Ring Main Unit Up to 15.5kV Fuse Switch RMU Trident See product SERVICES Products Solutions Energy Services Partnerships COMPANY About Us Leadership Team Careers CSR Modern Slavery Statement CUSTOMERS News Events Case Studies CONTACT Contact Us Part of Lucy Group © Lucy Group Ltd. 2021 Terms & Conditions Privacy & Cookie Policy Legal Site by Torpedo By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Cookies Settings Reject All Accept All Cookies