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.
A GIS ring main unit is 350mm to 600mm wide with no rear clearance needed. A metal enclosed switchgear panel for the same function runs 800mm or wider. In a 10-feeder substation, GIS saves roughly half the floor space. That is often the difference between a viable urban site and no site.
Yes. We build solid insulated switchgear with epoxy-encapsulated conductors and air insulated alternatives. Both meet IEC 62271. Solid insulated is compact like GIS with no gas. Air insulated is the traditional option. The choice depends on your site's environmental regulations and space.
Three-position load break switches for ring switching — closed, open, and earthed. Transformer feeders protected by fuses or vacuum circuit breakers. Fault isolation is automatic: a cable fault opens the switches on either side, and the rest of the ring stays energized. Motorized operation available for remote SCADA switching.
