earching for Composite Polymer Long Rod Insulators in India?
At Venkateswara Suppliers Pvt Ltd (VSPL), we manufacture high-strength Polymer Long Rod Insulators for power transmission lines ranging from 66 KV to 400 KV. Built using ECR-grade FRP rods, HTV/LSR silicone rubber, and precision-engineered metal fittings, our insulators offer lightweight construction, excellent electrical performance, and long-term weather resistance — ideal for India’s challenging environments.
What Are Composite Polymer Long Rod Insulators?
Composite Long Rod Insulators are tension-type insulators designed for high-voltage transmission lines. Unlike conventional ceramic or glass strings, they consist of a solid FRP core sheathed in silicone rubber, with metal end fittings crimped on both sides.
They offer superior mechanical strength, vandalism resistance, and excellent hydrophobicity, ensuring stable performance even under heavy pollution or moisture.
Advantages at a Glance:
Technical Specifications – Composite Polymer Long Rod Insulators
| Parameter | 66 KV | 110 KV | 132 KV | 220 KV | 400 KV |
|---|---|---|---|---|---|
| Nominal System Voltage (KV) | 66 | 110 | 132 | 220 | 400 |
| Rated System Voltage (KV) | 72.5 | 123 | 145 | 245 | 420 |
| Frequency (Hz) | 50 | 50 | 50 | 50 | 50 |
| Minimum Failing Load (KN) | 70 , 90 , 120 | 70 , 90 , 120 | 70 , 90 , 120 , 160 | 120 , 160 , 210 | 90 , 120 , 160 |
| Creepage Distance (KV/MM) | 31 × KV | 31 × KV | 31 × KV | 31 × KV | 31 × KV |
| Applicable Standards | IEC 61109:2008 / IEC 62217 | IEC 61109:2008 / IEC 62217 | IEC 61109:2008 / IEC 62217 | IEC 61109:2008 / IEC 62217 | IEC 61109:2008 / IEC 62217 |
Why Choose VSPL
Venkateswara Suppliers Pvt Ltd (VSPL) is one of India’s most trusted names in electrical and renewable infrastructure components.
Our Composite Polymer Long Rod Insulators are developed and type-tested as per IEC 61109, IEC 62217, and ANSI C29.13 standards to ensure consistent performance and safety in the toughest operating environments.
Why Utilities Prefer VSPL:
- In-house FRP pultrusion and rubber moulding facility.
- Proven performance in high-voltage lines (up to 400 KV).
- Stringent quality testing — 5,000 hrs accelerated ageing, 1,000 hrs tracking tests.
- Quick customization with B&S or T&C end fittings.
- Supplied across major transmission and renewable projects in India.
FAQs
They are available for 66 KV, 110 KV, 132 KV, 220 KV, and 400 KV transmission lines.
Long rod insulators have a single solid FRP core without joints or metal caps, offering better mechanical reliability and less weight compared to disc-string assemblies.
Yes. The hydrophobic silicone rubber surface prevents dust and moisture accumulation, ensuring self-cleaning and reduced leakage current.
All VSPL Long Rod Insulators conform to IEC 61109, IEC 62217, and ANSI C29.13.
Absolutely. We offer both Ball & Socket (B&S) and Tongue & Clevis (T&C) fittings with custom creepage and mechanical ratings as per client requirements.
Get a Quote
Contact us today to learn more about VSPL's Composite Polymer Long Rod Insulators, including product details, pricing, and custom solutions.
Business Hours
Mon - Sat: 9:00 AM - 6:00 PM