Dogbone FRP Insulation For Transformer

FRP Dog Bone Insulation Material Bars and Corner Angles are specialized, pultruded structural profiles engineered for high-performance electrical insulation and structural reinforcement. Manufactured from fiberglass-reinforced polymer (FRP), these components are the cornerstone for building safe, durable, and reliable systems in demanding electrical and corrosive environments. They are specifically designed to replace traditional materials like wood, steel, or concrete, offering a superior combination of mechanical strength, dielectric integrity, and exceptional corrosion resistance.

Material & Manufacturing:

Our Dog Bone profiles are produced via a continuous pultrusion process, ensuring consistent quality, dimensional stability, and uniform strength throughout the length. They are fabricated from non-alkali fiberglass reinforcements impregnated with high-grade epoxy, polyester, or vinylester resins, and cured at high temperature. 

This results in a homogeneous composite material with properties identical to high-class insulating boards (e.g., SG-200 equivalent), featuring a temperature index of up to 210°C. The process guarantees the finished product's outstanding dissolving resistance, low water absorption, and flame-retardant characteristics.

Key Specifications & Performance Data

Temperature Class: Rated for F (155°C) and H (180°C) systems, making them suitable for high-temperature operation.

Standard Sizes: A wide range of cross-sectional dimensions is available, including but not limited to: 4×8mm, 6×6mm, 8x10mm, 10×16mm, 16×16mm, and 18×20mm. Custom profiles can be developed to meet specific design requirements.

Core Properties: Exceptional dielectric strength, high mechanical load-bearing capacity, and outstanding flame resistance.

Advantages of FRP dogbone insulation material:

• High Mechanical Strength & Dimensional Stability: Offers physical strength comparable to metals while maintaining shape under load and temperature variation.

• Superior Electrical Isolation: Excellent dielectric properties ensure safety and reliability in high-voltage environments.

• Corrosion & Flame Resistance: Impervious to moisture, chemicals, and solvents; inherently flame-resistant for enhanced safety.

• Inherent Safety: High resistance to brittle fracture and vandalism, ensuring long-term integrity and reduced maintenance.

Application:

These pultruded insulation profiles are indispensable across numerous industries:

1. Electrical Power: Insulation structures in transformers, electric reactors, motor wedges, and switchgear.

2. Public Transit & Rail: Insulating components for railway, subway, and tramway systems, including cable management.

3. Infrastructure: Cable tray channels, ladders, reinforcement cores for cables, and drain/water transport systems where corrosion resistance is critical.

4. Industrial & Consumer: Used in tooling handles, sports apparatus, and garden facilities due to their safety, strength, and weatherability.