Porcelain Spool Insulator 1.Certificated by IEC,ANSI,GB,ISO9001 2.We can design and produce according to the drawing Spool ... 1.Standard:IEC,ANSI,GB,BS,AS,DIN and etc 2.Non-standard products:Designed by TCIPorcelain spool insulator,ceramic insulator1 ... -353-453-5Transverse Strength/lb(kN)2000(89)3000(13.3)4000(17.8)4500(20)6000(26.7)Average Flashover ...