Glass Insulators
01
High Voltage 40kn U40B Disc Suspension Toughened Glass Insulator
Video
specification
| IEC designation | U40B/110 | |
| Diameter D | mm | 178 |
| Height H | mm | 110 |
| Creepage distance L | mm | 185 |
| Socket coupling | mm | 11 |
| Mechanical failing load | kn | 40 |
| Mechanical routine test | kn | 20 |
| Wet power frequency withstand voltage | kv | 25 |
| Dry lightning impulse withstand voltage | kv | 50 |
| Impulse puncture voltage | P.U | 2.8 |
| Power frequency puncture voltage | kv | 90 |
| Radio influence voltage | μv | 50 |
| Corona visual test | kv | 18/22 |
| Power frequency electric arc voltage | ka | 0.12s/20kA |
| Net weight per unit | kg | 2.1 |
Application
Material
It's primarily made of toughened or annealed glass. This glass acts as the dielectric material, meaning it prevents the flow of electric current.
Form
It typically consists of individual disc-shaped or bell-shaped units. Each unit has a metal cap on top and a metal pin underneath, bonded to the glass body with cement (usually Portland cement).
Function
Its main purpose is to electrically isolate the high-voltage conductor (the power line wire) from the grounded support structure (the transmission tower or pole). It also mechanically supports the weight of the conductor.
