... only has good lightning protection function, but also prevent power grid from surging, it has such fast response ... is 470V, meanwhile the transient (surge) appears in power grid.HK lightning surge protection device can react more ... Thunder Protection,Electrical Control,System Protector, Direct Strick Protection, Power solutions,Surge Diverter,Thunder Arrester,Surge Absorber. 4.ApplicationCNC Lathe ...