The Load Break Switch for overhead lines is divided into SF6 or solid insulated type depending on an insulation method. Also, it is divided into motorized type (operated by electrical signal) and manual type (operated by the operator). The Motorized LBS is equipped with voltage and current sensors to monitor distribution networks. The LBS is structured to be operated by a driver with a single spring, and has constant opening and closing time. For SF6 insulated type, materials with excellent electrical properties are used at the tulip type contact point, and thus, high mechanical and electrical operation characteristics, and stability are achieved.