Looking for Composite Polymer Disc Insulators in India?
At Venkateswara Suppliers Pvt Ltd (VSPL), we manufacture IEC-certified Polymer Disc and Long Rod Insulators designed for power transmission and distribution systems up to 400 KV. Built using ECR-grade FRP rods and high-quality silicone rubber, our disc insulators ensure maximum strength, weather resistance, and long service life — even in coastal, industrial, and polluted environments.
What Are Composite Polymer Disc Insulators?
Composite Polymer Disc Insulators (also called Long Rod Insulators) are used to mechanically support conductors and electrically insulate them from transmission towers. Unlike traditional porcelain or glass types, polymer insulators are lighter, non-brittle, and self-cleaning, offering superior performance and reduced maintenance costs.
Key Benefits:
Technical Specifications – Composite Polymer Disc / Long Rod Insulators
| Parameter | 11 KV | 15 KV | 22 KV | 33 KV |
|---|---|---|---|---|
| Nominal System Voltage (KV) | 11 | 15 | 22 | 33 |
| Rated System Voltage (KV) | 12 | 17 | 24 | 36 |
| Frequency (Hz) | 50 | 50 | 50 | 50 |
| Creepage Distance (mm) | 320 | 430 | 665 | 900 / 1116 |
| Dry Power Frequency Withstand Voltage (KV) | 65 | 75 | 85 | 110 |
| Wet Power Frequency Withstand Voltage (KV) | 45 | 55 | 55 | 95 |
| End Fittings Type | Ball & Socket (B&S), Tongue & Clevis (T&C), Dead End | B&S, T&C | B&S, T&C | B&S, T&C |
| Applicable Standards | IEC 61109:2008 / IEC 62217 | IEC 61109:2008 / IEC 62217 | IEC 61109:2008 / IEC 62217 | IEC 61109:2008 / IEC 62217 |
Why Choose VSPL for Composite Disc Insulators
Venkateswara Suppliers Pvt Ltd (VSPL) brings over 25 years of electrical engineering expertise and advanced in-house pultrusion and silicone moulding technology. Our polymer disc insulators are designed and tested to meet global standards — IEC 61109, IEC 62217, and ANSI C29.13 — ensuring superior performance under mechanical, electrical, and environmental stresses.
What Sets VSPL Apart
- FRP core rods manufactured in-house with ECR glass + hydrolysis-resistant epoxy resin
- Silicone rubber available in HTV and LSR grades
- Type-tested for 5,000 hours accelerated ageing & 1,000 hours erosion test (IEC 62217)
- Proven performance in 66 KV to 400 KV systems
- Quick supply timelines & custom fitting designs
FAQs
They are available for 11 KV to 400 KV applications, suitable for both transmission and sub-transmission networks.
Each unit uses an FRP core, high-grade silicone rubber housing, and zinc-coated metal fittings for maximum mechanical and electrical reliability.
They are lighter, non-brittle, hydrophobic, and resistant to cracking, making them ideal for coastal and polluted areas.
Yes — all products conform to IEC 61109, IEC 62217, and ANSI C29.13 standards.
Yes, we can modify creepage distance, end fittings (B&S or T&C), and mechanical strength as per project needs.
Get a Quote
Contact us today to learn more about VSPL's Composite Polymer Disc Insulators, including product details, pricing, and custom solutions.
Business Hours
Mon - Sat: 9:00 AM - 6:00 PM