The Post Composite Insulator is a robust solution engineered for high-voltage installations where both mechanical support and dielectric strength are required. Built to perform in harsh outdoor and industrial environments, this insulator combines durable construction with long-term reliability in overhead lines, substations and power-distribution facilities.
This post insulator uses advanced composite materials—such as fibre-reinforced polymers (FRP) or resin-impregnated glass fibre cores—overmoulded with weather-resistant silicone or polymeric sheds. The composite core provides high mechanical strength and creep resistance, while the outer sheds ensure excellent insulation performance and UV resilience. The design is free from brittle ceramics and resists vandalism, cracking, and surface erosion. Anchoring hardware or flange bases are integrated to ease mounting on cross-arms or support structures.
The post composite insulator is rated for high-voltage applications, offering strong dielectric withstand capability, low leakage current, and reliable insulation under repeated stress and contamination. Mechanically, it supports significant axial and bending loads imposed by conductors, wind or ice. The composite body ensures stable performance across wide temperature ranges and resists moisture ingress that can degrade traditional porcelain insulators. The simplified geometry and lightweight nature reduce installation difficulty while maintaining high mechanical margins.
This insulator is ideal for use in overhead transmission and distribution systems, substation bus supports, switchgear yards, and high-voltage switch-rooms. It suits both new build and retrofit scenarios, especially where traditional insulators might suffer from cracking or weather damage. With its composite construction, it offers advantages in coastal, industrial or polluted environments where contamination and maintenance pose challenges. In summary, the Post Composite Insulator provides a cost-effective, long-life solution for modern power grid infrastructure, combining durability, high-voltage insulation and mechanical resilience.
Application:
This product is applied to high voltage power line service.
Features:
Good gydrophobicity, anti-aging, anti-leakage trace, electric erode proof,tensile strength and bending strendth, strong mechanical strength,shock resistance, good quakeproof,brittle failure proof,light weight.
Advantage:
1) Easy to installation.
2) The installation size of top and base are the same size with porcelainp in type, they can exchange to use each other.
| Product Model | Rated Voltage | Rated mechanical Bending Load(KN) | Structure Height H.(mm) | Insulating Distance Li.(mm) | Min Creepage Distance(mm) | Diameter of shed D.(mm) | Lightning Impulse Withstand Voltage(peak) (kv) | P.F.withstand Voltage (virtual value)(kv) |
| FZSW-10/4 | 10 | 4 | 215 | 125 | 290 | 100/90 | 75 | 42 |
| FZSW-24/8 | 24 | 8 | 300 | 220 | 750 | 142 | 150 | 65 |
| FZSW-35/6 | 35 | 6 | 450 | 360 | 946 | 148/118 | 185 | 95 |
| FZSW-66/6 | 66 | 6 | 760 | 630 | 1886 | 160/130 | 410 | 185 |
| FZSW-66/8 | 66 | 8 | 760 | 630 | 2010 | 220/190 | 410 | 185 |
| FZSW-110/10 | 110 | 10 | 1220 | 1080 | 3530 | 220/190 | 500 | 230 |
| FZSW-220/10 | 220 | 10 | 2440 | 2200 | 7060 | 220/190 | 1000 | 395 |
Our Journey
N.I.U Electric Group started over two decades ago with a vision to transform the electrical industry. From a local business, we've grown into a global leader, driven by our commitment to delivering innovative and reliable electrical solutions.
Quality Commitment
Quality is at our core. Every product is meticulously designed and manufactured in our state-of-the-art facilities, ensuring top-notch standards and durability.
Innovative Solutions
Our R&D team continually explores cutting-edge technologies to create products that set industry benchmarks, enhancing safety and efficiency.
Global Presence
With a strong global network, we cater to diverse market needs, ensuring timely delivery and exceptional service, while staying connected to our local roots.
Sustainability
We prioritize eco-friendly practices and corporate responsibility, striving to minimize our environmental footprint and support community initiatives.
Customer Focus
Our customers are central to our success. We provide tailored solutions, expert support, and a seamless experience to meet their unique needs.
Join us at N.I.U Electric Group and experience excellence in electrical solutions. For more details, visit our website. 
FAQ
N.I.U Electric Group is a global leader in providing high-quality electrical products. Founded over two decades ago, we have grown from a local business into an internationally recognized company, dedicated to innovation and excellence in the electrical industry.
We ensure quality through rigorous quality control measures at every stage of production. Our state-of-the-art manufacturing facilities are equipped with advanced technology, and our dedicated team of engineers meticulously designs and tests each product to meet the highest industry standards.
At N.I.U Electric Group, you can purchase a wide range of electrical products including:
Choosing N.I.U Electric Group ensures you receive products of the highest quality, backed by our extensive experience and commitment to customer satisfaction. We offer innovative solutions, a global reach with local impact, and a customer-centric approach that prioritizes your needs. Our focus on sustainability and eco-friendly practices further sets us apart from other suppliers.
We provide a comprehensive range of services including:
