In modern transformer design, the insulation system is one of the most critical elements impacting performance, lifespan, and operational safety. With the advancement of materials and casting technologies, epoxy resin insulators have become essential in medium and high voltage transformers. These components not only offer excellent electrical insulation but also meet high mechanical strength requirements in compact installation spaces.
Below are several key types of epoxy insulation components widely used in transformer applications, each serving a specific role in achieving stable and durable insulation performance
Commonly used at high-voltage and low-voltage terminal interfaces, epoxy bushings serve as a sealed electrical passage between transformer windings and external circuits. They provide excellent dielectric performance, mechanical support, and protection against moisture ingress or contamination.
2. Epoxy CT and VT Support Insulators
Current transformers (CTs) and voltage transformers (VTs) inside power transformers require precision-mounted, stable supports. Epoxy support insulators ensure dimensional stability, resist partial discharge, and maintain insulation even in the presence of electromagnetic stress.
3. Epoxy Barrier Boards
These flat molded panels are placed between phases or windings to provide isolation and arc protection. Made from high-purity cast epoxy, they offer high tracking resistance and thermal endurance, reducing internal fault risks.
4、Epoxy Post Insulators for Terminal Connections
Supporting terminals or connection plates within the transformer, epoxy post insulators combine structural strength with reliable insulation. They are engineered to handle high short-circuit forces while maintaining insulation integrity in compact transformer designs.
5、Epoxy Coil Supports and Clamping Blocks
These molded components fix coil windings in place and provide mechanical protection. Their insulation capability helps prevent surface discharges and movement-induced faults, especially under thermal cycling conditions.
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Each of these products plays a vital role in enhancing insulation reliability, preventing breakdowns, and ensuring long-term transformer stability.
At Putai, we offer a comprehensive range of epoxy resin insulation components tailored for transformer applications. Our solutions are designed with system-level thinking—combining material performance, mechanical fit, and electrical reliability—to help transformer manufacturers achieve safer, more consistent insulation structures.
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