porcelain insulator

57 series line post insulator are used in distribution line,net work transmission line and other power line. The insulator are mounted rigidly on supporting structure by means of bolt or pin Connecting fitting type :tie top conductor binding type and clamp top with vertical and horizontal mounting Cantilever strength can be 5kn,10kn,12.5kn and 16kn Main type : type :57-1,57-2,57-3,57-4,57-5,57-11,57-12,57-13,57-14,7-15,57-21,57-22,57-23,57-24,57-25,57-31,57-32,57-33,57-34,57-35 According to ANSI C29.7,IEC383,and BS137