U420B Toughened Glass Suspension Insulator - 420KN Strength, 550mm Creepage Distance, IEC Certified
| Specification | Unit | Value |
|---|---|---|
| Spacing | mm | 205 |
| Shed Diameter | mm | 380 |
| Creepage Distance | mm | 550 |
| Mechanical Failing Load Strength | KN | 420 |
| Power Frequency Withstand Voltage - Dry | KV | 90 |
| Power Frequency Withstand Voltage - Wet | KV | 55 |
| Lightning Impulse Flashover Voltage | KV | 140 |
| Puncture Voltage | KV | 140 |
| Coupling Size | mm | 28 |
The toughening process induces prestresses in the glass shell through rapid controlled cooling of hot molded glass. This creates compressive forces on the outer surface layer balanced by tensile forces inside the glass body, preventing crack formation or propagation indefinitely.
Toughened glass insulators feature the unique property of breaking into small corn-size chunks when overstressed mechanically or electrically. Available in transparent or light green colors, all components are fully recyclable and environmentally friendly.
The U420B toughened glass insulator serves as a string insulator component in transmission lines or substations up to 1000kV. It can be assembled as suspension strings or tension strings with compatible hardware components.
- IEC standard certified with CS IEC compliance
- Mass production capability in modern manufacturing lines
- Consistent quality control with uniform glass components
- Smooth surface finish for easy maintenance
- Fully recyclable materials supporting environmental sustainability
- Cost-effective pricing with reliable performance
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