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ANSI 57-3 High Voltage Tie Top Porcelain Line Post Insulator

ANSI 57-3 High Voltage Tie Top Porcelain Line Post Insulator It is a ceramic high-voltage line post insulator that complies with American national standards and uses top tied wire fixation. Its main function is to serve as both a mechanical support for wires and an insulator to isolate current in high voltage environments.
Despite the emergence of new products such as composite polymer insulators, this classic porcelain pillar insulator is still widely used in power grids around the world due to its excellent reliability and durability.
  • Minimum Leakage Distance 29 In
  • Dry-arcing distance 12.25 In
  • Reference height/length 15 In
  • Cantilever strength 2800 Lbs
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Product Details

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Product drawing

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Product parameters

Line post type porcelain insulators
ANSI Class 57-1 57-2 57-3 57-4 57-5
Dimensions
Creepage distance mm 356 559 737 1015 1145
Dry arcing distance mm 165 241 311 368 438
Mechanical Values
Cantilever strength kn 12.5 12.5 12.5 12.5 12.5
Cantilever strength routine test kn 5 5 5 5 5
Electrical Values
Type application voltage kv 25 35 45 55 66
Low frequency dry flashover voltage kv 80 110 125 150 175
Low frequency wet flashover voltage kv 60 85 100 125 150
Critical impulse flashover voltage,positive kv 130 180 210 255 290
Critical impulse flashover voltage,negative kv 155 205 260 340 380
Radio influence Voltage Data
Test voltage RMS to ground kv 15 22 30 44 44
Maximum RIV at 1000kHz μv 100 100 200 200 200
Packing and Shipping Data
Net weight,approximate kg 5.2  9.0  11.0  16.0  18.0 

Detailed Photos

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The ANSI 57-3 High Voltage Tie Top Porcelain Line Post Insulator is a classic, standardized insulator used in high-voltage transmission and distribution lines.
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