The primary-secondary integrated outdoor ring main unit is based on the integration technology of the ring main unit and secondary equipment. The automated measurement and control terminal collects signals such as the current, voltage, switch status, and gas pressure alarm of each incoming and outgoing circuit of the ring main unit. The DTU panel has the function of intelligent distributed feeder automation (FA), enabling the intelligent operation, protection, and remote control of the ring main unit. The SF6/environmentally friendly gas fully insulated and fully sealed ring main switchgear introduced in this product has the characteristics of modularity, expandability, full insulation, full sealing, safety, reliability, and maintenance-free operation. It is suitable for any harsh environment (such as stormy areas, flood-prone areas, and highly polluted areas), and is widely used in industrial parks, residential areas, streets, airports, various buildings, bustling commercial centers and other places.
Operating environment
●Altitude: ≤ 1000 m;
●Ambient temperature: -30℃~+40℃; The highest monthly average temperature is 30℃ and the highest annual average temperature is 20℃;
●Relative humidity: Daily average ≤ 95%, monthly average ≤ 90%;
● Shockproof level: Horizontal acceleration 0.4m/S², vertical acceleration 0.15m/S²;
● Installation location: Places without severe impact, serious pollution, chemical corrosion, conductive dust or explosion hazard;
Features
●Meet the latest standards and technical requirements of state grid’s integrated primary and secondary outdoor ring main unit.
●Compact structure and small footprint. The interface size and installation size meet the requirements of the state grid. The overall assembled structure is detachable and the internal units can be replaced in one piece.
●The shell is made of 304 stainless steel, the basic structure is "eye" shaped, the top is equipped with heat insulation device and the overall protection rating is IP43. It is waterproof, moisture-proof, condensation-proof and corrosion-proof to ensure long-term operation.
● The built-in inflatable ring network cabinet has a module design to meet any combination solutions of different cabinets and it is easy to install and replace. The gas box is made of 3mm thick 304 stainless steel plate and undergoes laser cutting and laser penetration welding with high welding strength and sealing performance. The annual leakage rate is less than 0.1%, the protection rating is IP67, and the weld is beautiful, avoiding the defects of argon arc welding such as large weld scars, uneven weld stress and micropores.
●The technical solution of deep integration of primary equipment and secondary equipment has been realized. The DTU device and ring network cabinet use aviation sockets, which are easy to disassemble and assemble on site. It meets the application requirements of "integrated O&M and factory O&M".
