Composite Suspension Insulator-
70KN to 550KN
A high-performance composite suspension insulator engineered for AC transmission lines from 10kV to 1000kV. Our 110kV composite suspension insulator, 12kV composite suspension insulator, and 132kV composite suspension insulator models feature HTV silicone rubber housing, FRP core, and 25+ year service life.
Certified to
IS0 9001:2015
IEC 61109
ANSI C29.11
IEEE 4
What Is a Composite Suspension Insulator?
A composite suspension insulator (also called a long-rod insulator or polymer insulator) is an overhead line insulator assembled from three precisely engineered components:
- Epoxy-impregnated fiberglass core rod — carries the full mechanical tensile load with exceptional strength-to-weight ratio.
- HTV silicone rubber weather-shed — provides creepage distance, hydrophobicity, and superior resistance to tracking and erosion.
- Forged galvanized-steel end fittings — secure connection to tower and conductor hardware, tested to IEC 61109 mechanical standards.
| Parameter | Value / Range | Standard |
|---|---|---|
| Mechanical Load | 70 kN – 550 kN | IEC 61109 / ANSI C29.11 |
| Nominal Voltage | 110 kV – 1000 kV AC | IEC 61109 |
| Housing Material | HTV Silicone Rubber | – |
| Core Rod | Epoxy-impregnated FRP | – |
| End Fittings | Forged galvanized steel | IEC 61109 |
| Creepage Distance | ≥ 2,900 mm (110kV) – 18,000 mm (1000kV) | IEC 60815 |
| Service Life | 25+ years | – |
| Lightning Impulse Withstand | ≥ 1,050 kV | IEC 60071 |
| Power Frequency Withstand | ≥ 500 kV (110kV class) | IEC 60071 |
| Wind Load | Up to 550 N (per IEC test) | IEC 61109 |
| Temperature Range | –40°C to +80°C | – |