The FKW18 series outdoor AC high-voltage load switch consists of an isolation switch, an arc extinguishing chamber, and an operating mechanism. Adopting the principle of gas generation arc extinguishing, it has the advantages of simple structure, low maintenance workload, strong arc extinguishing ability, fracture insulation level and reliability, reaching the advanced level of similar products at home and abroad. The FKW18 series outdoor AC high-voltage load switch is suitable for outdoor three-phase AC power distribution systems with rated voltage of 12KV~40.5KV and rated frequency of 50HZ. It can be used to open and close distribution lines with load, and can also be used to open and close no-load transformers. At the opening position, it can meet the safety distance requirements specified for the isolation switch.