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Selecting the Right Epoxy Insulator Series for Your Application

12 10, 2025
Posted By: Peter

In modern power distribution and substation equipment, the performance and reliability of epoxy insulators are critical to system integrity. Selecting the correct type is essential for ensuring long-term safety and minimizing maintenance in demanding environments, from compact switchgear to outdoor substations.


For high-voltage connection and support within substation and switchgear applications, the ZJ Series 12kV/24kV Post Insulators offer an optimal solution. Manufactured with high-grade cycloaliphatic epoxy resin, these post insulators provide exceptional tracking resistance, mechanical strength, and long-term performance stability. Their design is rigorously tested to comply with major international standards, ensuring high-quality compliance and reliability in medium-voltage systems.

 

Selecting the Right Epoxy Insulator Series for Your Application


In busbar insulation and support, the SM Bus Bar Insulator (DRUM type) stands out. Its unique drum shape and thermosetting insulation material ensure uniform dielectric stress distribution and superior creepage distance. This design makes it one of the best materials for thermoplastic insulators in terms of durability and resistance to environmental contaminants, which is vital for substation busbar reliability.


The choice between post and busbar epoxy insulators depends on specific electrical, mechanical, and environmental requirements. Key selection factors include rated voltage, BIL (Basic Insulation Level), mounting configuration, and the presence of corrosive atmospheres. Proper matching of the insulator to its application is fundamental for achieving performance stability and system longevity.


Putai supplies a comprehensive range of high-performance epoxy insulators, including the ZJ Series and SM Bus Bar Insulator. Each product is engineered for high-quality compliance and performance stability. Putai also supports customization and the supply of related medium-voltage accessories to meet system integration needs. For tailored insulator solutions that enhance your system's reliability, contact our technical team.

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More Related Products
SM Bus Bar Insulator(DRUM)
  • Made of Epoxy Resin: Delivers high dielectric strength and thermal resistance.
  • Excellent Mechanical Stability: Rigid molded body ensures long-term structural integrity.
  • Reliable for Medium & Low Voltage Systems: Ideal for 380V–12kV power bus bar support.
  • Embedded Brass/Iron Inserts: Provide strong and secure mounting.
  • Heat-Resistant: Operational range from -40°C to +140°C.
  • Compact DRUM Design: Space-efficient and easy to install in panels.
  • Customizable: Insert type, thread size, and resin color can be tailored on request.
24KV Integrated Insulator
  • High Mechanical Strength:Excellent mechanical strength ensures long-term usage.
  • Aging Resistance:Strong aging resistance, suitable for various environmental conditions.
  • Wide Application:Widely used in medium voltage switchgear and GIS.
  • High Insulation Performance:Withstands 65kV power frequency voltage and 125kV lightning impulse voltage, ensuring the safety of electrical equipment.
  • IP67 Protection Level:Effectively prevents water and dust ingress, suitable for use in harsh environments.
35KV Integrated Insulator
  • One-Piece Molding Design:Enhances mechanical strength and high voltage resistance.
  • High Voltage Resistance:Withstands 95kV power frequency voltage and 185kV lightning impulse voltage, ensuring the safety of power equipment.
  • Wide Application:Suitable for high voltage switchgear, isolators, and other equipment.
  • IP67 Protection Level:Effectively prevents water and dust ingress, suitable for use in harsh environments.
  • High Mechanical Strength:Ensures durability and stability for long-term use.
ZJ Series 12kV Post Insulators
  • Material:High-strength epoxy resin for durability
  • Creepage Distance:Optimized for outdoor and polluted environments
  • Insulation Performance:Excellent dielectric strength and insulation resistance
  • Compact Structure:Space-saving design with reliable mechanical properties
  • Low Partial Discharge:Ensures stable electrical performance
  • Corrosion Resistant:Performs well in harsh environmental conditions
  • Versatile Sizes:Supports various installation configurations
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