Define the distribution duty first
A ring main unit (RMU) is commonly used where a compact, dependable medium-voltage distribution solution is required. Before comparing models, identify whether the project needs incoming and outgoing ring feeders, transformer protection, metering or a circuit-breaker feeder.
Key information for a 12kV RMU enquiry
- Network arrangement: ring-in/ring-out, transformer feeder or a combination.
- Protection type: load-break switch with fuse protection, or VCB protection where protection coordination requires it.
- Rated voltage and current: confirm the 12kV system rating and feeder current.
- Installation environment: indoor/outdoor installation, ambient conditions and cable-entry requirements.
- Control requirements: manual or motorized operation, relay, remote indication and interlocking requirements.
Choose a configuration, not just an enclosure
The best RMU configuration depends on the transformer size, cable network, protection philosophy and space available. A clear single-line diagram is the fastest way to align the switching functions with the actual project.
What to send for an accurate quotation
Share the single-line diagram, voltage, rated current, fault level, quantity, delivery destination and any local standards required by the project.
Explore our 12kV SF6 Ring Main Unit, or contact Enertro with your diagram for technical support.