1.Standard of IEC 2.Materials:Glass insulator 3.Main Diameter D:255mm ... InsulatorsDisc Suspension Insulators for HV LineASNI:52-1,52-2.,52-3,52-4,52-5,52-6,52 ... Lines Pin Type Insulator (ANSI): 56-1,56-2,56-3,56-4,56-5Pin Type Insulator for ... low & medium voltage lines (ANSI): 55-1,55-2,55-3,55-4,55-5Pin type insulator (AS): ... 57-15d. Strain insulators for ANSI:54-1,54-2,54-3,54-4,54-5e. Spool Insulators ...