FXB-33-70CT Composite Insulator | 33kV Anti-Pollution

Overview

Operating Conditions

1. Altitude: ≤1000 (Customization needed for higher altitudes);

2. Ambient Temperature: -25°C to +40°C;

3. Seismic Intensity (China 12-grade standard): 8;

4. Pollution Level: Class IV and above;

5. Creepage Distance: ≥ 25mm/kV (according to pollution level).

Core Advantages & Features

The FXB-33-70CT Composite Long Rod Insulator combines a high-strength FRP core rod with hydrophobic silicone rubber sheds to provide reliable insulation and mechanical support for high-voltage overhead transmission lines.

1. Excellent Pollution Flashover Resistance
   The hydrophobic silicone rubber surface helps prevent continuous water-film formation, while the optimized shed structure increases creepage distance. This improves insulation performance in humid, coastal, salt-fog, and heavily polluted environments and helps reduce contamination-related flashover risks.
2. Strong Aging & Corrosion Resistance
   The silicone rubber housing offers good resistance to UV radiation, ozone, acid rain, moisture, and environmental aging. The FRP core rod is designed to maintain reliable mechanical and electrical performance during long-term outdoor service.
3. High Mechanical Strength & Lightweight Construction
   The high-strength fiberglass reinforced polymer core provides excellent tensile performance while keeping the overall insulator significantly lighter than conventional porcelain designs. This helps reduce tower loading and simplifies transportation, installation, and high-altitude construction.
4. Excellent Seismic & Impact Resistance
   The composite structure combines strength with good toughness and resistance to mechanical shock, helping withstand strong winds, vibration, and other demanding environmental conditions while reducing the risk of brittle breakage.
5. Flexible Specifications for Different Applications
   The FXB-33-70CT can be supplied with different connection lengths, such as 900mm, 1000mm, and 1200mm, allowing flexible adaptation to different transmission-line structures, installation requirements, and insulation coordination needs.

Overall, the FXB-33-70CT provides a lightweight, durable, and pollution-resistant alternative to traditional porcelain long-rod insulators for demanding high-voltage transmission applications.

Technical Data

Quality Assurance & Certifications

Quality control is an essential part of the FXB-33-70CT Composite Long Rod Insulator manufacturing process. From raw material selection and FRP core rod production to silicone rubber shed molding and end-fitting assembly, each stage is controlled to ensure consistent product performance and reliability.

• ISO 9001 Quality Management System
  Supports standardized quality control throughout material procurement, manufacturing, inspection, and final delivery.
• IEC 61109 Compliance
  Designed and tested in accordance with the applicable requirements for composite suspension and tension insulators used in AC overhead transmission lines.
• CCC Certification
  Available for applicable product configurations and markets.
• CE Certification
  Available where applicable to the intended market and product configuration.

Factory Testing

Before shipment, FXB-33-70CT composite insulators can undergo relevant performance inspections and tests, including:

• Mechanical load testing
• Power-frequency withstand voltage testing
• Lightning impulse withstand testing
• Hydrophobicity and surface performance inspection
• Dimensional and assembly inspection

These quality-control procedures help verify the mechanical and electrical performance of each insulator before delivery.

Installation & Maintenance

The FXB-33-70CT Composite Long Rod Insulator features a lightweight, durable structure that simplifies transportation, handling, and on-site installation. Unlike brittle porcelain materials, its composite construction provides better resistance to impact and mechanical damage during transportation and installation.

The silicone rubber sheds provide hydrophobicity and good resistance to environmental aging and contamination. Under normal operating conditions, this helps reduce pollution accumulation and routine cleaning requirements, lowering maintenance workload and helping minimize potential transmission-line downtime.