Generally used in power distribution lines. Air-core current-limiting reactors are often connected in series on branch feeders originating from the same busbar to limit the short-circuit current of the feeder and maintain the busbar voltage, preventing it from dropping too low due to a short circuit. A weather-resistant coating is applied to its surface: sprayed with room temperature vulcanizing silicone rubber (RTV) with high insulation resistance and hydrophobicity. Utilizing the excellent insulation properties of RTV rubber, the reactor maintains good surface resistance insulation performance and effectively suppresses dendritic discharge phenomena on the reactor surface. This ensures the safe operation of the air-core current-limiting reactor in outdoor environments. This product utilizes computer-aided electromagnetic optimization calculations and three-dimensional spatial structural design, employing an epoxy fiberglass reinforced multi-encapsulated parallel structure, advanced process technology, microcomputer-controlled production equipment, and imported testing equipment for production and inspection. This product boasts advantages such as good inductance linearity, low loss, uniform temperature distribution, high insulation strength, high mechanical strength, low partial discharge, low noise, small size, light weight, moisture resistance, flame retardancy, strong overload capacity, high reliability, no pollution, maintenance-free operation, and good environmental performance.