Epoxy Machined Component

1.. Product Introduction
The insulated through-core rod for metal-oxide surge arresters is a core internal component of composite-housed metal-oxide surge arresters. Manufactured using continuous alkali-free glass fibers impregnated with epoxy resin and formed through high-temperature pultrusion, it is used for internal compression and support of zinc-oxide resistor disks within the arrester, serving both mechanical fastening and primary insulation functions. Specifications can be customized to meet assembly requirements for arresters of various voltage classes.
2. Product Performance Features
Excellent Electrical Performance: Dense structure with no delamination or air bubbles, high dielectric strength, stable volume resistivity, effectively suppresses partial discharge, ensuring long-term insulation reliability of the arrester.
High Mechanical Strength: High tensile, flexural, and impact strength, with stable rigidity, continuously compresses resistor disks and withstands transportation and operational vibration loads.
Environmental Durability: Low water absorption, resistant to damp-heat and salt-spray corrosion, passes water diffusion and dye penetration tests, resistant to moisture-induced degradation.
Precise Dimensional Accuracy: Straight rod body with controllable tolerances; can be precision-machined with threads and end faces, suitable for automated arrester assembly.
Lightweight: Density significantly lower than metal, reducing overall arrester weight, suitable for long-term outdoor service conditions.
3. Applicable Standards
GB/T 19519 Composite Insulators for Overhead Lines with Nominal Voltage Above 1000V
DL/T 1580 Technical Specifications for Glass-Fiber Reinforced Epoxy Mandrels for Composite Insulators
GB 11032 AC Gapless Metal-Oxide Surge Arresters
Enterprise Standard: Taporel Electrical Insulated Through-Core Rod Internal Control Technical Specifications
Can meet the test requirements of corresponding IEC related standards
4. Application Scenarios
10kV–1000kV AC composite-housed metal-oxide surge arresters
Substation and overhead-line pole-mounted arresters, tank-type arresters
Lightning arresters for wind power and photovoltaic power stations
Industrial grid arresters for rail transit, metallurgy, chemical, and other industries
Internal support and fastening structures for various gapless and gapped zinc-oxide arresters
5. Notes
Storage: Store in a dry, ventilated environment, avoid prolonged direct sunlight, extrusion, and impact.
Supply: Available as plain rods or finished machined rods with threaded ends; accompanied by factory inspection reports.