Composite Insulators
Composite insulators are new types of electrical insulation devices with polymer materials (such as silicone rubber) and epoxy glass fiber core rods as the core. As a leading composite insulator Manufacturer, ZheXi delivers high-performance polymer insulator solutions tailored for the most demanding electrical applications. Backed by decades of R&D and adherence to international standards, our polymer composite insulator designs combine silicone rubber housing and epoxy glass fiber core rods to ensure a maintenance-free lifespan exceeding 30 years. From high-pollution coastal zones to space‑constrained urban grids, ZheXi’s expertise guarantees reliable insulation performance under extreme conditions.
ZheXi composite insulator Manufacturer crafts each polymer insulator using a silicone rubber housing bonded to an epoxy glass fiber core rod, providing exceptional hydrophobicity and resistance to environmental aging. Engineered for a 30+ year maintenance‑free service life, our high voltage insulator products eliminate the need for frequent inspections or replacements.
| Parameter | Specification |
| Insulation Strength | ≥3.5 kV/mm (core rod) |
| Voltage Resistance | AC: 100–1000 kV; DC: 150–1200 kV |
| Anti-Flicker Performance | Leakage current <50 µA; Flashover voltage ≥2.5×operating voltage |
| Parameter | Specification |
| Tensile Strength (Core Rod) | 100–550 kN |
| Flexural Strength | ≥150 MPa |
| Seismic Resistance | Withstands 8.0 Richter scale earthquakes |
| Impact Resistance | 5 J/cm² (IEC 61109) |
| Modulus of Elasticity | 40–60 GPa (core rod) |
| Deformation Control | <0.1% under max load |
| Parameter | Specification |
| Operating Temperature | -50°C to +80°C |
| Hydrophobicity Recovery | 24 hours after contamination |
| UV Resistance | 20+ years (no cracking/weathering) |
| Corrosion Resistance | Resists acids, alkalis (pH 1–12) |
| Altitude Range | Up to 5000 meters |
Polymer Composite Post Insulators for Substations
Tailored voltage ratings up to 1200 kV.
Adjustable mechanical loads between 100–550 kN.
Custom lengths, fittings, and anti‑glare color options.
Collaborative design support for unique project requirements.
Standards: IEC 61109, IEC 61952, ANSI C29.11.
Tests: Salt‑fog, power‑arc, tensile load, UV‑aging per international protocols.
Warranty: 30‑year performance guarantee.
Maintenance: Free technical guidance and on‑site inspections.
Training: Workshops on installation best practices and lifecycle management.
ZheXi composite insulator Manufacturer's signature high voltage Composite insulator range features:
Silicone Rubber Housing: Lightweight and hydrophobic, the housing resists cracking and pollution buildup.
Epoxy Glass Fiber Core Rod: Offers superior tensile strength and flexibility compared to porcelain counterparts.
Long Lifespan: Validated by field studies showing composite insulators maintain integrity for over 30 years in harsh environments.
Mainly used in high-voltage transmission lines, coastal/industrial pollution areas and other high-pollution environments, high-altitude mountainous areas, and urban power grid renovation and other space-constrained areas.
High‑Voltage Transmission Lines (AC/DC systems up to 1200 kV): Ideal for overhead suspension and tension applications in utility grids.
Polluted Environments: Performs reliably in coastal, industrial, and desert regions where contamination flashovers are prevalent.
Harsh Terrains: Tested in high‑altitude and seismic zones to withstand reduced air pressure and mechanical stress.
Urban Grid Upgrades: Compact designs suit space‑constrained substations and retrofit projects.
Railway Electrification: Corrosion‑resistant catenary insulators ensure uninterrupted service in electrified rail systems.
R&D Expertise: Millions invested in advanced polymer formulations and core rod technology ensure industry‑leading performance.
Global Compliance: Certified for use in over 50 countries, meeting all major electrical safety regulations.
Sustainability: Utilizes 100% recyclable materials and adheres to low‑carbon production processes, reducing environmental impact.
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Application
Our company's products are sold well in North America, Latin America, Southeast Asia, Africa, the Middle East, etc., and we have established long-term and stable cooperative relations with many international customers.
