Polymeric Insulator
Our polymeric insulator is an electrical insulator made from polymer materials rather than traditional ceramic or glass. These insulators are widely used in power transmission and distribution systems to support and electrically isolate conductors while withstanding environmental and mechanical stresses.
As a leading polymeric 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 composite polymer insulator 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.
✔ Pin Type Insulator: Mounted on a pin on the cross-arm of a pole.
✔ Suspension Insulator: Hangs from the conductor via a string of insulator units.
✔ Post Insulator: Vertical support for conductors in substations.
✔ Strain / Tension Insulator: Designed to handle mechanical tension in conductors.
In addition to polymer insulators of various structural types, we also offer polymer insulators made of materials such as silicone rubber. We can produce and manufacture polymer insulators for low to high voltages, from 11kV to 110kV.
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 |
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.
Warranty: 30‑year performance guarantee.
Maintenance: Free technical guidance and on‑site inspections.
Training: Workshops on installation best practices and lifecycle management.
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.
1. High-Quality Materials
Our polymeric insulators are made from premium-grade silicone rubber, EPDM, and composite materials, ensuring excellent electrical insulation, mechanical strength, and durability even in the harshest environments.
2. Lightweight and Easy to Install
Compared to traditional porcelain or glass insulators, our polymeric insulators are significantly lighter, reducing transportation costs and making installation faster and safer.
3. Superior Weather Resistance
Designed to withstand rain, UV exposure, pollution, and temperature fluctuations, our insulators maintain excellent hydrophobicity, reducing leakage current and surface contamination issues.
4. Strong Mechanical Performance
Our insulators provide high tensile and compressive strength, making them ideal for high-voltage transmission lines, substations, and heavy-duty distribution networks.
5. Low Maintenance & Long Life
Thanks to their corrosion resistance and hydrophobic surface, our polymeric insulators require minimal maintenance and deliver reliable performance over many years.
6. Versatile Applications
Suitable for a wide range of applications, including:
High-voltage transmission lines
Substations and switchgear
Distribution networks
Railway electrification systems
7. Compliance & Certification
Our insulators meet international standards such as IEC, ANSI, and IEEE, ensuring safety, reliability, and consistent quality for global projects.
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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.
