11kV-66kV Line Post Insulator for Overhead Power Lines

Product Overview

The 11kV-66kV line post insulator is an essential insulating and supporting component used in medium- and high-voltage overhead power lines. It is designed to support conductors, withstand mechanical loads and provide reliable electrical insulation between live conductors and poles, crossarms or supporting structures. Wishpower composite line post insulators are manufactured with a high-strength fiberglass core, silicone rubber housing and galvanized metal end fittings, making them suitable for distribution lines, substation connections, urban grid upgrades and polluted outdoor environments.

Wishpower 11kV-66kV line post insulators are composite post insulators designed for overhead distribution and transmission line applications. Composite line post insulators are commonly used on AC overhead lines above 1,000V, and IEC 61952-1 defines the terminology, end fittings and designation system for this type of product. The standard also covers similar applications in substations and electric traction lines.

Compared with traditional porcelain or glass insulators, Wishpower polymer line post insulators offer better handling efficiency, improved pollution performance and lower maintenance requirements.

Key advantages include:

• Composite insulation structure: Made with an epoxy fiberglass core and silicone rubber sheds.

• Excellent hydrophobicity: Silicone rubber housing helps reduce leakage current and pollution flashover risk.

• Lightweight design: Easier to transport, install and replace compared with porcelain insulators.

• Good mechanical strength: Suitable for conductor support, wind load, vibration and line stress.

• Wide voltage range: Available for 11kV, 15kV, 22kV, 24kV, 33kV, 35kV and 66kV systems.

• Outdoor reliability: Suitable for coastal, humid, polluted, industrial and mountainous environments.

Core Features

• Reliable Electrical Insulation
  The 11kV-66kV line post insulator is designed with optimized shed profiles and creepage distance to improve insulation performance under wet, polluted and outdoor operating conditions.

• Strong Mechanical Performance
  The fiberglass core provides the main mechanical strength, allowing the insulator to withstand conductor load, wind pressure and operating vibration. For composite line post insulators, important mechanical indicators may include specified cantilever load, tensile load and maximum design cantilever load.

• Excellent Pollution Flashover Resistance
  The silicone rubber housing reduces the formation of continuous water films on the insulator surface, helping improve flashover resistance in polluted areas.

• Weather and Aging Resistance
  The polymer housing offers resistance to ultraviolet radiation, ozone, temperature variation and electrical tracking.

• Lower Installation and Maintenance Cost
  The lightweight structure reduces installation labor, transport risk and maintenance frequency.

• Customizable for Projects
  Wishpower can customize voltage level, creepage distance, end fitting type, mechanical load and applicable standards according to project requirements.

Product Structure

Wishpower 11kV-66kV composite line post insulators generally consist of the following parts:

1. Fiberglass Core Rod
   Provides tensile, bending and impact resistance as the main load-bearing component.

2. Silicone Rubber Housing
   Forms the external insulation layer, increases creepage distance and improves pollution resistance.

3. Metal End Fittings
   Usually made of hot-dip galvanized steel, cast steel or other metal materials for connection with crossarms, brackets or conductor clamps.

4. Sealing System
   Prevents moisture from entering the interface between the core rod and metal fittings.

5. Mounting Base or Connection Holes
   Designed for vertical mounting, horizontal mounting, crossarm installation or customized support structures.