Abstract:In order to enhance the management and maintenance of high-voltage lines and reduce the scope of power outages, a new three-phase linkage double-fracture high-voltage vacuum isolation load switch is studied in view of the problems of harsh environmental impact and SF₆ gas emission of high-voltage column switch products widely used in rural power grids and suburbs.The new power distribution equipment adopts epoxy resin solid insulation and silicone rubber outer insulation technology, which has the advantages of high and low temperature resistance, ultraviolet resistance and aging resistance.At the same time, the miniaturized spring operating mechanism and hanging spring transmission mode are adopted to improve the reliability of the equipment.In addition, the switch is embedded with a vacuum arc extinguishing device, which eliminates the need for SF₆ gas insulation and is more environmentally friendly.Compared with traditional equipment, the high-voltage disconnector in this study adopts double vacuum switch and three-phase column flip-mounted structure, which has the advantages of pollution-free, safe and reliable, with long life and low cost, and provides an innovative solution for the effective management and maintenance of high-voltage lines.