Epoxy Casting Compound

Epoxy casting compound is a filled epoxy material. It is designed for dry-type transformers and instrument transformers. This product targets two common problems: casting cracks and high partial discharge. It uses high-purity bisphenol A epoxy resin as the base. It adds surface-treated ultrafine silica powder as the filler system. The material goes through vacuum reactor degassing and homogenization. It is available for OEM replacement, aftermarket supply, and bulk orders.

Our epoxy casting compound fits many electrical equipment types. It is used in dry-type transformer coil casting and partial discharge control. It also suits current transformers and voltage transformer insulation. High-voltage insulators and composite bushings use it. Medium-voltage switchgear busbar insulation supports also use it. Cable terminals and joint insulation filling benefit from it. The table below shows typical equipment matching.

These values help buyers compare materials. They also help engineers set process parameters. The data comes from third-party CMA and SGS reports. Each batch is traceable.

This material supports replacement and custom supply. Buyers often come with a device model, drawing, or performance target. They need a material that matches the original insulation system. We review the voltage level, wall thickness, and curing method. Then we recommend the right grade. The table below shows common replacement scenarios.

This material offers several engineering benefits. It has stable electrical strength from 28 to 32 kV/mm. It reaches a glass transition temperature above 130°C. It shows low linear shrinkage from 0.4% to 0.7%. It also keeps gel time between 12 and 18 minutes at 120°C. These features reduce internal stress during casting. They also improve partial discharge performance. The material flows well in complex molds. It cures with a controlled exotherm curve. This helps prevent cracks in large castings. It also performs well in humid and hot environments.

We control quality at every production step. Each batch goes through four inspection stages. These are incoming material check, process check, finished product check, and shipment check. We test electrical strength, viscosity, and gel time. We also keep samples for traceability. Our factory holds CMA and SGS reports. These reports verify the key values in the specification table. We do not just claim high quality. We provide test data for each shipment.

Buyers can follow a simple selection process. First, confirm the equipment type and voltage level. Second, check the required insulation thickness and curing method. Third, review the viscosity and gel time needs. Fourth, compare electrical strength and heat resistance. Fifth, request a free sample for line testing. Our team helps match the right grade. We also help adjust the formula if needed. This saves time and reduces trial and error.

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