| Customization: | Available |
|---|---|
| Application: | High-voltage |
| Material: | Composite Polymer |
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The 72.5kV post-type polymer composite insulator is an essential high-voltage insulation component used in medium to high voltage AC transmission systems. It combines excellent electrical and mechanical properties, especially in polluted or humid environments. Compared to traditional porcelain or glass insulators, it offers superior performance, lower maintenance, and longer service life.
This product uses a high-strength epoxy fiberglass rod as the core, ensuring exceptional mechanical and insulating performance. The outer sheath is made from high-temperature vulcanized silicone rubber with a shed profile that resists tracking and flashover. End fittings are made of hot-dip galvanized steel or aluminum alloy, providing strong and corrosion-resistant connections.
| Specification Item | Technical Data |
|---|---|
| Rated Voltage | 72.5kV |
| Power Frequency Withstand | ≥160kV (wet condition) |
| Lightning Impulse Withstand | ≥325kV |
| Mechanical Bending Strength | ≥8kN |
| Creepage Distance | ≥1810mm |
| Operating Temperature | -40ºC ~ +60ºC |
| Shed Material | HTV Silicone Rubber |
| Core Material | Epoxy Glass Fiber Rod |
| End Fittings | Galvanized Steel / Aluminum |
| Pollution Class | Class III or IV (customized) |
Excellent Insulation: High dielectric strength ideal for complex environments;
Strong Pollution Flashover Resistance: Hydrophobic silicone surface forms water film, reducing risk of arcing;
Lightweight & Easy to Install: 30% lighter than ceramic insulators;
Corrosion & Aging Resistant: Ideal for coastal, chemical, or high-altitude regions;
Maintenance-Free: Over 30-year service life with minimal upkeep required.
It is widely used in transmission lines up to 110kV, switchyards, high-voltage substations, urban power networks, and railway power supply systems. Especially suitable for high-altitude, high-salt, and high-pollution environments.
We offer comprehensive customization options including length, creepage distance, end fitting types, and enhanced pollution performance levels. OEM and ODM cooperation is welcome, with drawing customization and sample development available upon request.
As a direct factory, we provide competitive pricing without compromising quality. The price of 72.5kV post-type composite insulators depends on specific configurations such as number of sheds, pollution class, and fitting types. Contact us for the latest quotation and delivery schedule.
WishPower is a professional manufacturer of composite insulators. We serve various industries with reliable solutions. If you have equipment procurement needs, please feel free to contact us for a product quote.
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