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    High-voltage current-limiting fuses are critical protection devices designed to safeguard electrical equipment from overcurrents and short circuits. They operate by rapidly interrupting excessive currents, ensuring the safety and reliability of power systems.     High Voltage Fuse
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    Our High-Voltage Protection and Detection Series offers a comprehensive range of devices designed to ensure the safe and reliable operation of high-voltage electrical systems up to 40.5kV.     Switchgear Protection
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    We offer fully sealed oil-immersed transformers and epoxy resin cast dry-type transformers, both of which combine excellent electrical performance with long-term operational stability, are capable of operating reliably under a wide range of demanding conditions, and fully meet the varying requirements for reliability and environmental adaptability in power distribution and various industrial applications.     Transformer Series
    European Cable Termination
    FUYI is also a leading manufacturer of medium and high voltage cable connectors and accessories for power distribution applications. Our product range includes single-phase or three-phase insulated cable connections to equipment such as transformers, switchgear, and branch boxes via premoulded connectors.     European Cable Termination
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  1. Home
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  4. Post Insulator
Post Insulator

APG-cast epoxy insulators provide void-free insulation, partial discharge <10pC, and custom creepage for 10-35kV.

  • Advanced APG or VPI process eliminates internal voids, reducing partial discharge below 10pC for long-term insulation reliability.
  • Customizable structural height, creepage distance, and shed diameter to meet non-standard specifications or tropical conditions.
  • 100% factory-tested for partial discharge, power frequency withstand, and X-ray inspection to ensure IEC compliance.
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Insulation Parts
CT/PT Transformers
Surger Arresters
Medium Voltage Fuse
Switchgear Contacts
Cable Accessories
Switchgear Protection
Switchgear Devices
Transformer Series
European Cable Termination
Post Insulator Wall Bushing Plug-in Bushing Contact Box
Current Transformer Potential Transformer
Lightning Arrester Over Voltage Protector
Fixed Contact Tulip Contact Contact Arm Flat Contact
Auxiliary Switch Cable Clamp
Indoor Disconnectors Load Switches Vacuum Circuit Breakers Fully Enclosed Gas-Insulated Switchgear Box Type Outdoor Prefabricated Substation High Voltage Switchgear Series Low Voltage Switchgear Series
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Epoxy Resin Indoor Post Insulator Ø65×130 Ø65×140 – 10kV Switchgear
ZJ-10Q Ø65×130 / ZJ-10Q  Ø65×140
Epoxy Resin Indoor Post Insulator Ø65×130 Ø65×140 – 10kV Switchgear
Epoxy Resin Indoor Post Insulator Ø75×130 – 10kV Switchgear
ZJ-10Q  Ø75×130
Epoxy Resin Indoor Post Insulator Ø75×130 – 10kV Switchgear
Epoxy Resin interior Post Insulator Ø85×140, Ø85×145, Ø85×150
ZJ-10Q  Ø85×140, Ø85×145, Ø85×150
Epoxy Resin interior Post Insulator Ø85×140, Ø85×145, Ø85×150
Epoxy Resin interior Post Insulator Ø85×160, Ø85×170
ZJ-10Q  Ø85×160, Ø85×170
Epoxy Resin interior Post Insulator Ø85×160, Ø85×170
Epoxy Resin Indoor Post Insulator – 70×210 Model
ZJ3-24Q Ø70×210
Epoxy Resin Indoor Post Insulator – 70×210 Model
Epoxy Resin Indoor Post Insulator – 110×190 / 110×210 / 110×225 Models
ZJ-24Q 110×190/210/22
Epoxy Resin Indoor Post Insulator – 110×190 / 110×210 / 110×225 Models
Epoxy Resin Indoor Post Insulator – 145×320 / 145×330 / 145×360 / 145×380 Models
ZJ-35Q
Epoxy Resin Indoor Post Insulator – 145×320 / 145×330 / 145×360 / 145×380 Models
12kV Interconnected Insulator – For PT Truck & Isolating Truck (630A~1250A)
12kV Interconnected Insulator – For PT Truck & Isolating Truck (630A~1250A)
12kV Interconnected Insulator – For PT Truck & Isolating Truck (1600A~3150A)
12kV Interconnected Insulator – For PT Truck & Isolating Truck (1600A~3150A)
35kV Series Interconnected Insulator
35kV Series Interconnected Insulator
Insulator for Low Voltage Withdrawable Switchgear (MCC)
GCK
Insulator for Low Voltage Withdrawable Switchgear (MCC)
supplier
Switchgear Insulation Supplier

As a professional supplier of terminal blocks, Fuyi uses high-quality epoxy resins from leading brands and advanced APG technology to ensure exceptional insulation performance and connection reliability.

With state-of-the-art manufacturing equipment and strict 6S factory management, we are able to guarantee fast delivery even for large orders of high-quality terminal blocks.

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Access Fuyi's technical documentation and FAQs to help you quickly select the right model and install with confidence.
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FAQ Related To Insulators
What is the difference between epoxy and composite insulators? Expand
Epoxy insulators (APG cast) are ideal for indoor switchgear. Composite insulators (silicone rubber) are better for outdoor or polluted environments.
What bending strength do your post insulators provide? Expand
Our standard post insulators provide bending strength ≥5kN (ZJ-10Q) to ≥6kN (ZJ-24Q/35Q). Higher strength options are available for special requirements
Can you manufacture insulators with custom mounting holes? Expand
Yes. We can customize mounting hole positions, thread sizes, and center distances based on your cabinet drawings.
LATEST EVENTS AND BLOG
How to Set Up a Medium Voltage Current Transformer for Metering?
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How to Set Up a Medium Voltage Current Transformer for Metering?
Step-by-step guide to correctly install and wire a medium voltage current transformer for revenue metering. Covers ratio...
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How Often to Inspect Switchgear Contacts for Heat and Corrosion?
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How Often to Inspect Switchgear Contacts for Heat and Corrosion?
Discover how often to inspect switchgear contacts for heat and corrosion based on operating environment, load, and criti...
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OEM/ODM & Quality Control
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OEM/ODM & Quality Control
Standard components don't always fit every application. Non-standard insulator heights, special transformer ratios, cust...
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Access Fuyi's technical documentation and FAQs to help you quickly
select the right model and install with confidence.
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  • Fast Response – 24-hour reply to your inquiries, samples in 7-15 days
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25+ years as a manufacturer focused on medium & high voltage switchgear components.
PRODUCT CATEGORIES
  • Insulation Parts
  • CT/PT Transformers
  • Surger Arresters
  • Medium Voltage Fuse
  • Switchgear Contacts
  • Cable Accessories
  • Switchgear Protection
  • Switchgear Devices
  • Transformer Series
  • European Cable Termination
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yana@fuyiswitch.com
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+86-13968706570
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