Medium-voltage distribution projects often compare metal-clad withdrawable switchgear with ring main units. Both can serve 10kV and 12kV networks, but they solve different operational and installation requirements.
What is KYN28-12 metal-clad switchgear?
KYN28-12 is an indoor metal-clad withdrawable switchgear concept typically used where a project needs individual feeder protection, compartmentalized construction, a withdrawable vacuum circuit breaker, and detailed protection and metering. It is a strong fit for industrial plants, substations, power-generation facilities, and projects with multiple outgoing feeders.
What is an RMU?
A ring main unit is a compact medium-voltage solution commonly used in secondary distribution networks. It is often selected for compact substations, urban networks, and ring-fed supply arrangements where footprint and simplified distribution are priorities.
Compare the project requirements
- Choose KYN28-12: when you need withdrawable breakers, extensive feeder protection, higher maintainability, or a larger customized lineup.
- Choose an RMU: when compact dimensions, ring-network operation, and a smaller secondary-distribution arrangement are the priority.
- Check the fault level: both solutions must be rated for the project short-circuit duty.
- Plan future expansion: consider spare feeders, cable routing, and operating access before selecting cabinet dimensions.
Information to share before selection
Provide the single-line diagram, system voltage, rated current, fault level, feeder quantity, protection requirements, installation room layout, cable-entry direction, and applicable standards. The manufacturer can then recommend a suitable lineup rather than simply quoting the smallest cabinet.
Discuss your medium-voltage distribution project
Explore the medium-voltage switchgear range, review the KYN28-12 switchgear, or send your requirements for a technical recommendation.