Every ring main unit is type-tested to IEC 62271-200 at an accredited lab — internal arc classification, short-circuit withstand, dielectric, and mechanical endurance. ISO 9001 quality management covers production. We configure export orders for your market and can arrange third-party re-testing at KEMA or ASTA. Test reports ship with every order.
Our ring main units cover 12kV (11kV systems) and 24kV, with 630A busbar and 20kA/3s short-circuit withstand. All are type-tested to IEC 62271-200. SF6, solid, and air insulation options available. Standard configs ship in 4 to 6 weeks.
Yes. As ring main unit suppliers, we offer a smart ring main unit with motor operators and a SCADA controller. Operators open, close, and earth each switch from a control center over RS485, IEC 61850, or fiber. This matters for wind and solar collector sites, where a crew visit can cost a full day.
Yes. Our outdoor ring main unit range includes the SF6 insulated ring main unit in an IP54 pad-mounted cabinet. The sealed SF6 tank needs no maintenance for 30 years, and the powder-coated steel enclosure handles rain, dust, and coastal salt spray. For sites where SF6 is restricted, choose the solid insulated or air insulated RMU instead.
The ring main unit is the cabinet; ring main unit switchgear is the switching assembly inside it — the load break switch, fuse ways, earth switch, and cable chamber. In practice, tenders use the two terms interchangeably. Both refer to the 12kV (11kV) metal-enclosed switchgear that connects a ring network to transformers and loads.
If you are asking what is ring main unit switchgear, the answer is the complete switching assembly — load break switch, fuse switch or VCB, earth switch, and cable chamber — built for ring topology distribution. When you specify an 11kv ring main unit for an urban feeder, that is ring main unit switchgear. We build SF6, solid, and air insulated RMU series at 12kV, 630A busbar, 20kA/3s, IEC 62271-200 type-tested.
A ring main unit is a compact metal-enclosed switchgear assembly used in 12kV (11kV) ring distribution networks. If you ask what is ring main unit, the short answer is a device that isolates a faulted cable section while the rest of the network keeps supplying power. Our ring main units come in SF6, solid, and air insulated versions, all type-tested to IEC 62271-200 with 630A busbar and 20kA/3s short-circuit withstand.
