Insulating Slat

1. Product Introduction
Insulation strips, also known as insulating spacers, pultruded strips, or ventilation strips, are manufactured from alkali-free glass fibers impregnated with epoxy resin through a continuous pultrusion and high-temperature curing integrated molding process. They are classified as Class H high-temperature resistant composite insulating profiles. Combining excellent electrical insulation properties with exceptionally high mechanical strength, they serve as core insulating support components in dry-type transformers, reactors, and high-voltage power equipment. Their functions include winding isolation, load-bearing support, and the provision of reserved cooling air ducts.
2. Core Advantages
Excellent Insulation Performance: High dielectric strength, low partial discharge level, and low dielectric loss effectively prevent inter-phase and inter-layer winding short circuits.
High-Temperature Stability: Class H insulation rating (suitable for continuous operation at 180°C), resistant to deformation and cracking under high-temperature environments.
High Mechanical Strength: High flexural, compressive, and impact strength; resistant to bending under short-circuit electromagnetic forces; excellent dimensional stability.
Environmental Aging Resistance: Extremely low water absorption, moisture-proof, corrosion-resistant, arc-resistant, and flame-retardant, suitable for long-term continuous operation.
Flexible Customization: Available in various cross-sections such as rectangular, I-shaped, and U-shaped; supports custom cutting to length, slotting, chamfering, and drilling.
Smooth Surface Finish: Features a flat molded surface free from bubbles, cracks, or fuzzing, facilitating easy assembly.
3. Material Classification Options
Epoxy Pultruded FRP Insulation Strips (Primary Recommendation): The first choice for large-volume dry-type transformer production, offering the best overall performance.
3240 Epoxy Sheet Machined Strips: Suitable for small-batch, high-precision custom-shaped processing.
Melamine Insulation Strips: Offer superior arc resistance, making them suitable for use in UHV switchgear.
4. Typical Applications
Support and ventilation isolation between winding layers in dry-type transformers and reactors.
Insulating spacer blocks and isolation supports for high and low voltage motor coils.
Phase-to-phase insulating support components for switchgear and busbars.
Insulating structural components for power conversion systems (PCS), Static Var Generators (SVG), and high-voltage test equipment.
Insulating support assemblies for power capacitors and high-voltage frequency converters.
5. Typical Technical Parameters

6. Specifications
Standard Cross-Sections: Rectangular profiles such as 6×6, 8×8, 8×10, 10×10, 10×15, 12×12 mm.
Custom Profiles: I-shaped, U-shaped, and grooved profiles can be custom-manufactured with dedicated molds.
Length: Cut to length according to drawings with controllable tolerances.
OEM Services: Support for OEM processing based on provided drawings and sample testing is available.