This product is suitable for indoor three-phase AC 50Hz, rated voltage 40.5kV ring network power supply systems, mainly used in wind power generation, substations, industrial and mining enterprises, and high-rise buildings for receiving and distributing electrical energy, as well as for circuit protection, control, and monitoring.

Main Features:

Designed and manufactured using advanced foreign technology

Compact ring main unit that can be placed in box-type substations or directly inside wind turbine towers

SF₆ ring main unit with no chopping overvoltage and stable breaking performance

Can be equipped with multiple cable groups, facilitating easy connection and installation

Cabinet side features an observation hole (with anti-misoperation function) for viewing the grounding knife position and status

Enclosure made of imported aluminum-zinc coated sheet, with strong corrosion resistance, suitable for harsh environments

Equipped with complete mechanical "five-prevention" interlocks, ensuring safe, reliable operation and convenient handling

Main component—FL(R)N44A load switch is a three-position integrated unit, allowing fuse replacement without power interruption on the incoming side, facilitating user maintenance

SF₆ load switch adopts direct-acting compressed air arc extinguishing, with simple structure and compact size

Arc chamber made of stainless steel plate, formed in one step using special ribbing process and dedicated molds for high strength; welded by robotic welder for excellent sealing, corrosion resistance, and suitability for harsh environments

ZN91 vacuum circuit breaker offers high reliability and is especially suitable for frequent operations