A Ring Main Unit is a factory-assembled, metal-enclosed set of switchgear used in medium-voltage power distribution systems. RMUs are primarily used to ensure the continuous flow of electricity and are typically installed in secondary distribution networks. They allow for both ring and radial network configurations, enhancing the reliability of power supply by minimizing downtime duri... https://adliteelectricals.com/what-is-a-power-distribution-with-ring-main-units-rmus/