Extensible Ring Main Unit

Air-Insulated Switching for Cost-Effective Ring Networks

 

Our Extensible Ring Main Unit provides economical ring network switching. This product covers 10kV and 40.5kV voltage levels. It is used extensively in urban and rural distribution networks. Ring main circuits provide high supply reliability. The ring main unit is a key node in these networks. It distributes power from the ring main to branch users. We developed an air-insulated version for standard applications. This provides lower cost and simpler maintenance than gas-insulated units. The HXGN series uses air as the main insulation medium. The core component is the load switch inside the cabinet. Under normal operation, the load switch switches line load current. During line maintenance, the switch opens for visible isolation. The switch creates a visible gap for worker safety. This is the same function as higher-cost designs but at lower cost.

This Extensible Ring Main Unit has a simple and clear design. The air insulation approach provides maintenance advantages. There is no gas leakage monitoring or refilling needed. The unit operates with almost no routine maintenance. This is especially valuable for remote distribution sites. It also works well in rural areas with limited maintenance resources. The cost of this design is lower than SF6 equipment. This helps keep project equipment costs within budget. The unit can be configured with 2 to 6 incoming and outgoing circuits. This flexibility supports different ring network node configurations. The cabinet uses quality steel construction with anti-corrosion treatment. It is suitable for indoor distribution rooms or outdoor enclosures. Complete mechanical interlocking ensures correct operating sequences. The interlocking system meets five-prevention safety requirements.

Our Extensible Ring Main Unit undergoes complete mechanical and electrical testing. We verify all interlocking functions during factory testing. Each unit comes with a 12-month warranty from delivery. We provide support for both indoor and outdoor installations. The product's proven performance gives you confidence in your selection. Its simple design ensures easy installation and operation. Maintenance is straightforward and does not require special tools. The air-insulated design avoids environmental concerns associated with SF6. Choose our Extensible Ring Main Unit for economical and reliable ring network switching.

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