Looking for Composite Polymer Post Insulators in India?
At Venkateswara Suppliers Pvt Ltd (VSPL), we design and manufacture IEC-certified Polymer Post Insulators for substation and distribution line applications. Built using ECR-grade FRP rods, HTV/LSR silicone rubber, and corrosion-resistant metal fittings, our post insulators ensure mechanical stability, weather resistance, and maintenance-free operation across India’s toughest environments.
What Are Composite Polymer Post Insulators?
Composite Polymer Post Insulators are rigid, self-supporting insulators used in substations, switchgear, and pole-mounted applications. They provide mechanical support and electrical insulation for conductors and equipment such as disconnect switches and bus bars.
Made with silicone rubber housing and a fiberglass core, these insulators are ideal replacements for porcelain due to their light weight, strength, and pollution resistance.
Key Benefits:
Technical Specifications – Composite Polymer Post Insulators
| Parameter | 11 KV | 22 KV | 33 KV |
|---|---|---|---|
| Nominal System Voltage (KV) | 11 | 22 | 33 |
| Rated System Voltage (KV) | 12 | 24 | 36 |
| Frequency (Hz) | 50 | 50 | 50 |
| Minimum Failing Load (KN) | 5 | 5 & 10 | 10 |
| Creepage Distance (MM) | 320 | 600 | 900 / 1116 |
| Dry Power Frequency Withstand Voltage (KV) | 65 | 85 | 110 |
| Wet Power Frequency Withstand Voltage (KV) | 45 | 55 | 95 |
| No. of Sheds (Typical) | 3 + 3 | 5 + 5 | 10 + 10 |
| Applicable Standards | IEC 61109:2008 / IEC 62217 / IEC 61462 | IEC 61109:2008 / IEC 62217 / IEC 61462 | IEC 61109:2008 / IEC 62217 / IEC 61462 |
Why Choose VSPL
Venkateswara Suppliers Pvt Ltd (VSPL) combines 25+ years of electrical engineering expertise with advanced pultrusion and moulding technology to produce world-class composite insulators.
Our Post Insulators undergo 5,000-hour accelerated ageing and mechanical tests to ensure long-term reliability and compliance with IEC 61109 / IEC 62217 / IEC 61462 standards.
Why Power Utilities Choose VSPL:
- In-house FRP rod production (ECR glass + hydrolysis-resistant epoxy).
- Proven high-voltage reliability for 11–33 KV systems.
- Compact, lightweight, and corrosion-resistant design.
- Customized heights, creepage distances, and fittings.
- Stringent quality control with advanced testing infrastructure.
FAQs
They are used in substations and distribution systems to insulate and support bus bars, isolators, and other electrical equipment.
VSPL Post Insulators are available for 11 KV, 22 KV, and 33 KV applications, customizable for higher voltage levels on request.
They are lighter, shatter-proof, and hydrophobic, ensuring high reliability even in polluted or coastal conditions.
Yes — all units meet IEC 61109, IEC 62217, and IEC 61462 standards for design, testing, and performance.
Yes, we can modify creepage distances, mechanical load ratings, and metal fittings based on project-specific requirements.
Get a Quote
Contact us today to learn more about VSPL's Composite Polymer Post Insulators, including product details, pricing, and custom solutions.
Business Hours
Mon - Sat: 9:00 AM - 6:00 PM