Smart Ring Main Unit

As cities grow, cable ring networks become more common. The Smart ring main unit is made for this trend. It uses an SF6 load switch as the main switch. The whole unit uses air insulation. It is compact and easy to expand. Smart ring main unit is a metal-enclosed unit. It is used in industrial and residential ring networks. It serves small substations, switching stations, and city neighborhoods. For power reception and distribution at the end of the line, Smart ring main unit is the best choice.

This unit has a small size. It fits well in rooms with limited space. The SF6 load switch has strong closing and breaking ability. You can choose a load switch cabinet or a combination unit with fuses. The combination unit gives you better protection. When a short circuit happens, the fuse melts fast. It then triggers the load switch to open. This protects the transformer well. A common question we get is, "What is the insulation level?" The phase-to-phase and phase-to-ground power frequency withstand voltage is 42kV. The break gap is 48kV. Lightning impulse withstand voltage is 75kV and 85kV. Smart ring main unit has a protection level of IP3X. This keeps out solids larger than 2.5mm.

We offer flexible module options. You can choose from incoming cabinets, outgoing cabinets, metering cabinets, and PT cabinets. We can add a low-voltage box for meters or automation devices. This gives you room for future upgrades. We follow IEC60298 and GB3906 standards. All key parts like the SF6 load switch and fuses meet national standards. We have full type test reports for your project review. Smart ring main unit comes with an 18-month warranty. We pay special attention to SF6 gas pressure. Our service team checks gas levels during regular visits. We maintain the operating mechanism to keep the unit in top shape.