In application of new concept mechanism of bendable type blade structure LG Tri-MEC Air Insulated Load Break Switch (LBS) has been equipped with further advanced technology and in a system switching the circuits when checking, measuring, testing and repairing the instruments. at branch point with 3 phase load break switch designed customer-orientedly and considerably. In particular, a bendable type blade structure is significantly small in operation radius in contrast with existing direct line one and an arc discharge angle at the time of breaking operation is under 50°, thereby reducing the danger of accident by an arc remarkably. And it is suitable for a metal Enclosed, Pad-Mounted Switch gear and Package Substation thanks to higher insulation-resistant power and is equipped with durability, stability and economical efficiency. E2 class mechanical strength based on new standard application.