Liling Dongfang Electroceramic Co.,Ltd

Porcelain line post insulators manufactured by DONGFANG are wet process porcelain, and used in distribution and transmission line There are three types of porcelain line post insulators: Clamp Top insulators, Tie Top insulators, and “F” neck type insulators.

Main parameters:
Voltage Range: 1kV~220kV
Cantilever strength:4kN,8kN,12.5kN and as per client’s request
Glaze: Light grey, white, brown

Porcelain line post insulators complies with following standards:
● ANSI C29.7
● IEC60383
● AS60720


ANSI Class No. Creepage Distance(mm) Dry Arcing Distance(mm) Cantilever Strength(kN) Flashover Voltage（kV） Critical Impulse Flashover Voltage (kV) RIV Data Dry Wet Pos Neg Test voltage to ground (kV) Max.RIV at 1MHz (μV)
57-1 S/L 356 165 12.5 80 60 130 155 15 100
57-2 S/L 559 241 12.5 110 85 180 205 22 100
57-3 S/L 737 311 12.5 125 100 210 260 30 200
57-4 S/L 1016 368 12.5 150 125 255 340 44 200
57-5 S/L 1143 438 12.5 175 150 290 380 44 200
57-11 V/H 356 165 12.5 80 60 130 155 15 100
57-12 V/H 559 241 12.5 110 85 180 205 22 100
57-13 V/H 737 311 12.5 125 100 210 260 30 200
57-14 V/H 1016 368 12.5 150 125 255 340 44 200
57-15 V/H 1143 438 12.5 175 150 290 380 44 200