Insulators are vital for maintaining safe and efficient overhead transmission lines. While originally intended for telegraph poles, today, disk-shaped insulators are commonly attached to high-voltage wire connection towers to increase the creepage distance. Typically made from glass or ceramics, these insulators must withstand various electromechanical stresses caused by environmental and electrical load changes. If they fail, the entire line could suffer damage and reduced operating life.
The main function of insulators is to achieve electrical insulation and mechanical fixation, for which various electrical and mechanical performance requirements are specified. If under the specified operating voltage, lightning overvoltage and internal overvoltage, no breakdown or flashover along the surface; under the specified long-term and short-term mechanical load, no damage and damage; under the specified machine , After long-term operation under electrical load and various environmental conditions, no obvious deterioration will occur; the fittings of insulators will not produce obvious corona discharge under the operating voltage, so as not to interfere with radio or television reception. Because insulators are widely used devices, their connection fittings are also required to be interchangeable. In addition, the technical standards of insulators also require various electrical, mechanical, physical, and environmental conditions to test the performance and quality of the insulators according to different types and conditions of use.
Summary
1) Material:porcelain
2) Class ANSI: 56-1 56-2 56-3 56-4 56-5
3)pin type insualators for high voltage
4)safe usage
5)various desigins available
6)fast shipping and great service
7)good quality and reasonable price
Main dimensions and standard particulars | |||||||
Fig | 1 | 1 | 2 | 2 | 3 | ||
Class ANSI | 56-1 | 56-2 | 56-3 | 56-4 | 56-5 | ||
Main Dimensions (mm) | H | 146 | 165 | 191 | 241 | 318 | |
h | 50.8 | 50.8 | 50.8 | 50.8 | 63.5 | ||
D | 191 | 228 | 267 | 305 | 343 | ||
d | 34.9 | 34.9 | 34.9 | 34.9 | 34.9 | ||
d1 | 19 | 19 | 19 | 19 | 19 | ||
R2 | 14 | 14 | 14 | 14 | 14 | ||
Nominal Voltage (kV) | 23 | 23 | 35 | 46 | 69 | ||
Creepage Distance (mm) | 330 | 430 | 533 | 685 | 865 | ||
Minimum Flashover Voltage | Power-frequency | Dry (kV) | 95 | 110 | 125 | 140 | 175 |
Wet (kV) | 60 | 70 | 80 | 95 | 125 | ||
50% Impulse | Positive(kv) | 150 | 175 | 200 | 225 | 270 | |
Negative(kv) | 190 | 225 | 265 | 310 | 340 | ||
Radio Influence Voltage Data | Test Voltage to Ground (KV) | 15 | 22 | 30 | 30 | 44 | |
Maximum RIV at 1000kHz (uv) | 100 | 100 | 200 | 200 | 200 | ||
Low-frquency puncture puncture voltage average (kV) | 130 | 145 | 165 | 186 | 225 | ||
Dry arcing dislance (mm) | 178 | 210 | 241.3 | 285 | 356 | ||
Cantilever Failing Load(kN) | 1134 | 1360 | 1360 | 1360 | 1360 | ||
Weight (kg) | 3.7 | 5.3 | 7 | 10.8 | 13.5 |
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