A Study of Power Outage Reduction Due to Lightning by Using the Different Dielectric Strength of Supporting Points of Distribution Lines

Lightning has been the leading cause of power outage, therefore, there is a need for further reduction of outage caused by lightning. In this paper, authors are considering the application of resin arms, which can be a new menu for countermeasures of outage caused lightning. Since the resin arm has a different path length of ground fault path of the three-phase distribution wire, by appropriately arranging the phases that are prone to ground faults by changing the arrangement, it can be a rational countermeasure against power outage caused by lightning that allows up to one phase ground faults. Authors measured the creepage breakdown voltage of the prototype resin plate and verified the reduction of power outage caused by lightning by analysis.