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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


Up to 24kV Front Cable Entry

Aegis Plus

Up to 36kV Front Cable Entry

Aegis 36

17.5kV Side and Rear Cable Entry Fuse Switch


Oil Insulated Ring Main Unit

Up to 15.5kV Fuse Switch RMU