Description
1. Product Overview
We design this 24kV composite pin insulator for overhead 24kV power distribution lines. We build it with glass fiber epoxy core rod and high-temperature vulcanized silicone rubber sheds. All raw materials meet RoHS environmental rules. The product contains no harmful heavy metals like lead or mercury. It works for domestic power grids and overseas export power projects. You can directly replace old ceramic pin insulators with it.
It supports overhead wires and blocks electric leakage to the ground. It resists lightning, pollution and corrosion on power lines.
2. Structure & RoHS-compliant Materials
- Inner load-bearing core rod: High-strength epoxy glass fiber rod
It has stronger tensile strength than common steel. It resists bending and breaking. It never explodes like ceramic insulators. Its raw materials pass RoHS limits.
- Outer insulating sheds: Weather-resistant silicone rubber
We mold rubber sheds tightly around the core rod in one piece. It stops water and moisture from entering. It keeps water repellent for years to avoid pollution flashover. It stands UV rays, salt mist, acid and base corrosion outdoors.
- Top and bottom metal fittings: Hot-dip galvanized alloy
We make standard screw threads to fit pole pins. The galvanized layer stops rust. All metal coatings follow RoHS rules. It meets environmental standards for Europe, Southeast Asia and other overseas markets.
3. Main Advantages
- Strong electric performance for all power grid conditions
We set its creepage distance over 700 mm. It works well in heavily polluted areas near coasts or factories. It handles lightning shock voltage up to 145kV and wet power frequency voltage up to 65kV. It never turns into zero-value insulation or breaks into falling pieces. It keeps city and forest power lines safe.
- Light weight and high strength to cut construction costs
It only weighs 1/6 to 1/7 of ceramic insulators with the same size. One worker can carry and install it alone without heavy lifting machines. It bears 10kN or 11kN bending load. It stays stable under strong wind and road vibration. You do not need to strengthen old poles during replacement.
- Long service life with almost no maintenance
Silicone rubber fights ozone and extreme temperatures from -40℃ to +40℃. It can work outdoors for over 20 years. You skip regular zero-testing and washing work for ceramic insulators. Power teams save much time on daily inspections.
- RoHS green certification for domestic and export use
We check all rubber, metal and auxiliary materials against RoHS rules. It limits harmful substances such as lead, mercury and PBBs. It passes green power grid bidding standards at home and environmental entry rules for overseas projects.
- Standard size for easy replacement
We match its metal thread and mounting size with traditional ceramic pin insulators. You install it directly without changing poles or clamps. We offer single or multi-shed designs for plains, high-altitude, salt and industrial polluted areas.
4. Core Technical Data
| Item | Standard Value |
|---|---|
| Rated system voltage | 24kV |
| Rated bending failure load | 10kN / 11kN (optional) |
| Minimum creepage distance | ≥700mm |
| Dry lightning impulse withstand voltage | ≥145kV |
| 1-minute wet power frequency withstand voltage | ≥65kV |
| Applicable altitude | ≤1500m (custom long creepage for high altitude) |
| Working temperature range | -40℃ ~ +40℃ |
| Environmental standard | Fully RoHS compliant |
| Executed standards | IEC 61109, GB/T 19519 |
5. Application Scenarios (Special for Distribution Power Grid)
| No. | Application Place |
|---|---|
| 1 | Main and branch overhead 24kV power lines in towns and villages |
| 2 | Power grids near coasts, chemical factories and mines with heavy pollution |
| 3 | 24kV power transmission lines for solar and wind power stations |
| 4 | Power lines beside residential areas, highways and forests |
| 5 | New power grid construction and old line capacity upgrade projects at home and abroad |
| 6 | Export power projects that require RoHS environmental certification |
6. Delivery & Compliance Notes
We provide RoHS test reports, type test certificates and factory voltage test records with each batch.
We accept OEM customization: shed color (grey / red), special metal fittings, longer creepage distance and lightning-proof integrated styles.
We pack products in moisture-proof cartons. The packaging stays intact during long land and sea transport.
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