Ring Main Unit (RMU)

Ring main units provide compact, sealed medium voltage switching for secondary
distribution networks. We supply SF6 insulated and solid insulated RMUs at 12kV, 24kV and 33kV,
in configurations for ring or radial feed with transformer protection.
RMUs are the standard choice where space is tight and maintenance access is limited: compact
substations, urban distribution, renewable collection networks and industrial ring circuits.