Epoxy Resin Bushing in Modern Power Distribution Systems

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In high-voltage and medium-voltage power equipment, bushings serve as crucial components that enable the safe passage of electrical conductors through grounded barriers. Among the various types available, epoxy resin bushings have become increasingly popular due to their superior insulation, mechanical strength, and environmental resilience.

What Is an Epoxy Resin Bushing?

An epoxy resin bushing is a solid insulation component used to provide electrical isolation between live conductors and metal enclosures. Made by casting epoxy resin with fillers such as silica, these bushings offer high dielectric strength, mechanical rigidity, and excellent moisture resistance.

Manufacturers like Degatech Electric Co. Ltd use advanced epoxy formulations to produce bushings capable of withstanding harsh outdoor and industrial environments.

Advantages of Epoxy Resin Bushings

  1. Excellent Insulation Performance: The dielectric strength of epoxy materials ensures reliable performance even under high voltage stress.

  2. Compact Design: Allows smaller installation space compared to porcelain bushings.

  3. Environmental Durability: Resistant to humidity, corrosion, and chemical contamination.

  4. Mechanical Robustness: High impact and vibration resistance make them suitable for mobile equipment.

  5. Maintenance-Free Operation: No oil or gas filling is required, reducing maintenance costs.

Application Areas

Epoxy resin bushings are used extensively in:

  • Gas insulated switchgear (GIS)

  • Vacuum circuit breakers (VCB)

  • Distribution transformers

  • Ring main units (RMU)

  • Compact substations

Manufacturing and Quality Assurance

Degatech employs precision molding and curing technologies to ensure uniform insulation properties and dimensional accuracy. Each bushing undergoes partial discharge and thermal cycling tests before shipment, ensuring compliance with IEC 60137 and other global standards.

Why Epoxy Over Porcelain?

While porcelain bushings have long been standard, they are brittle and prone to breakage during transport or seismic activity. Epoxy bushings, by contrast, offer both mechanical flexibility and electrical reliability, making them ideal for modern compact switchgear systems.

Conclusion

Epoxy resin bushings represent a leap forward in safe, compact, and reliable power insulation technology. Backed by stringent manufacturing standards, Degatech Electric Co. Ltd continues to supply high-performance bushings that support the next generation of efficient and resilient power systems.

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