110kV Composite Fiberglass Post Cross Arm

The FS-110/5 fiberglass cross arm insulator is designed to efficiently utilize narrow corridors for power transmission, making it suitable for urban network technical upgrades. This insulator helps reduce pole tower heights, saving substantial human and material resources. Its high bending strength prevents cascading fracture accidents common in ceramic cross-arms, making it a superior alternative. Additionally, it is compact, lightweight, shock-resistant, impact-resistant, and maintenance-free, ensuring safe operation.

The composite cross-arm insulator consists of three main components: the core rod, the silicone rubber shed, and the end fittings.

Core rod made of epoxy resin fiberglass pultruded rod, the core rod acts as the skeleton of the composite insulator. It supports the shed, provides internal insulation, connects the end fittings, and bears mechanical loads. It has a high tensile strength, typically exceeding 600 MPa, which is twice that of ordinary steel and 5-8 times that of ceramic materials. The core rod also features excellent dielectric properties, chemical resistance, bending fatigue resistance, creep resistance, and impact resistance.

Silicone rubber housing: This housing protects the core rod, shields it from rain and snow, increases the creepage distance, and enhances the external insulation. It is made from high molecular polymer silicone rubber, with added flame retardants, anti-aging agents, and coupling agents. The housing is vulcanized under high temperature and pressure, providing good hydrophobicity, corrosion resistance, aging resistance, and electrical insulation. It also has high pollution flashover voltage and crush resistance, with a flashover voltage more than twice that of ceramics under similar conditions.

End Fittings: Manufactured from special steel, the end fittings are designed using the labyrinth principle for multi-layer protection and excellent sealing performance, addressing the critical issue of interface electrical breakdown. The connection between the end fittings and the core rod is achieved using advanced computer-controlled coaxial constant pressure crimping technology, supplemented by an automatic acoustic emission flaw detection system, ensuring reliable and stable connections. The core rod is made from high-temperature acid-resistant rods and is coated with special coupling agents at the interface with the silicone rubber. The umbrella sheath