RNN-12 630A SF6 Gas Insulated Load Isolation Switch

It is a compact load isolation switch specially designed for 12kV medium-voltage distribution networks, with a rated current of 630A, using SF6 gas as the insulation medium, and integrating two core functions: load current breaking and circuit safety isolation. The switch has a compact structure and excellent sealing performance, and can be directly embedded in cabinets such as gas-insulated cabinets and ring main units, suitable for power distribution scenarios with high requirements for space and reliability. It realizes safe switching between "closing-isolation" positions through mechanical interlock, can effectively cut off the rated load current of 630A, isolate live parts to ensure the safety of maintenance personnel, and is a key switch component for urban distribution networks, industrial parks and small and medium-sized substations.

The core advantages focus on four dimensions: insulation reliability, structural adaptability, safety protection, and operation and maintenance economy: ① Stable insulation performance: SF6 gas has an insulation strength 2-3 times that of air, no creepage or flashover risks, suitable for harsh environments such as humidity, dust and salt spray, with a long insulation life; ② Precise 630A current-carrying: Rated current 630A, rated short-time withstand current ≥25kA/3s, meeting the load requirements of small and medium-sized power distribution circuits with strong overload capacity; ③ High cabinet adaptability: The volume is only 1/3 of that of traditional open-type switches, and the installation size is fully compatible with mainstream 12kV gas-insulated cabinets and ring main units without additional cabinet modification; ④ Strict safety interlock: Built-in mechanical interlock, strictly following the anti-misoperation logic of "cannot open the cabinet door when closing, and can only maintain in isolation position" to eliminate operational accidents; ⑤ Low operation and maintenance cost: Fully sealed gas chamber design, SF6 gas leakage rate ≤0.1%/year, no frequent gas replenishment required, mechanical life of the whole machine ≥10000 times, greatly reducing the later maintenance workload; ⑥ Flexible operation: Supports electric remote control (RS485/Modbus protocol) and manual emergency operation, suitable for unattended substation needs.