RNV-A1-12D-1250A SF6 High Voltage Gas Insulated Inflatable Cabinet Circuit Breaker

It is a special gas-insulated circuit breaker with rated voltage 12kV and rated current 1250A, designed for compact inflatable cabinets and using SF6 gas as insulation and arc-extinguishing medium. This model integrates three core functions: short-circuit fault interruption, load current breaking, and circuit isolation. It features compact structure, excellent sealing performance and strong environmental tolerance, suitable for 12kV medium-voltage distribution network scenarios such as ring main units, branch cabinets and switching stations, and is a core protection switch component for urban power distribution and industrial park power supply.

The core advantages focus on four dimensions: high current-carrying capacity, insulation reliability, structural adaptability, and intelligent operation and maintenance: ① High current-carrying design: Rated current up to 1250A, short-time withstand current ≥31.5kA/3s, meeting the needs of high-load power distribution scenarios; ② Reliable insulation and arc-extinguishing: SF6 gas insulation strength is 2-3 times that of air, with fast arc-extinguishing speed and zero arcing breaking, suitable for harsh environments such as humidity, dust and salt spray; ③ Exclusive adaptation for inflatable cabinets: The volume is only 1/3 of traditional open-type circuit breakers, and the installation size is precisely matched to the switch compartment of inflatable cabinets without additional cabinet structure adjustment; ④ Convenient intelligent operation: Support electric remote control (RS485/Modbus protocol) and manual emergency operation, equipped with SF6 gas pressure monitoring and position status feedback functions, suitable for unattended station needs; ⑤ Low operation and maintenance cost: Sealed gas chamber design, gas leakage rate ≤0.1%/year, mechanical life of the whole machine ≥10000 times, greatly reducing the frequency of later maintenance.