What Exactly Is a Bushing with Epoxy?

A bushing with epoxy is a high-voltage electrical component encapsulated with epoxy resin for enhanced insulation and mechanical protection.

It is the most widely adopted insulation component for modern power systems in 2026, replacing over 70% of traditional porcelain bushings in new grid construction projects.

Core Structure Composition

In practice, a standard bushing with epoxy consists of three core layers: high-purity conductive copper core, modified epoxy resin insulation layer, and external anti-aging silicone coating. From field cases, this integrated structure cuts partial discharge rate by 72% compared to traditional split porcelain bushings.

Core Working Mechanism

Actual testing conducted by Anmei 2026 R&D team shows that the solid epoxy encapsulation eliminates all hidden air gaps between the conductive core and external mounting panel, ensuring uniform voltage distribution under 12kV to 126kV continuous operating conditions. Industry consensus shows that epoxy encapsulated design reduces insulation failure risk by 83% compared to non-epoxy alternatives.

Top 5 Key Advantages of Bushing with Epoxy

Bushings with epoxy outperform traditional porcelain and rubber bushings in almost all high-voltage operating scenarios, especially for harsh outdoor environments and mobile power facilities.

Superior Insulation Reliability

2026 global high-voltage insulation research data indicates that qualified epoxy bushings can withstand 30% higher impulse voltage than same-class porcelain products, with zero water absorption rate even under 720 hours of continuous rain immersion. In practice, Anmei’s epoxy bushings have recorded 12 years of zero failure in coastal areas with 95% average annual humidity.

Significantly Lower Operating Cost

Unlike brittle porcelain bushings that crack easily under mechanical impact, epoxy encapsulated bushings are 65% lighter and have anti-vibration performance that meets IEC 60137 standard, cutting on-site installation cost by 40% and reducing annual maintenance frequency to less than once per 5 years.

1. 100% non-hygroscopic epoxy material eliminates moisture-related insulation breakdown risks
2. Lightweight design reduces transportation and on-site handling labor cost by 35% on average
3. Custom moldable design supports non-standard dimension requirements for special power equipment
4. UV-stabilized epoxy formula resists 20+ years of outdoor UV exposure without performance degradation
5. Flame-retardant epoxy material meets UL94 V-0 standard to prevent fire spread during equipment fault

Main Application Scenarios for Bushing with Epoxy

Bushings with epoxy are widely adopted in new power grid projects, new energy generation facilities and industrial power distribution systems in 2026.

Renewable Energy Power Stations

From 1200+ field cases shared by Anmei’s 2026 client portfolio, epoxy bushings are the top choice for 35kV and 110kV wind turbine and solar inverter stations, as they can withstand temperature ranges from -40℃ to +120℃ without performance loss.

Indoor and Outdoor Switchgear Systems

In practice, over 80% of new-generation medium and high voltage switchgears launched after 2020 use epoxy bushings to replace traditional porcelain models, to reduce overall equipment footprint and improve operational safety.

Performance Metric	Bushing with Epoxy	Traditional Porcelain Bushing
Partial Discharge Level	<5pC	≤50pC
Impact Resistance	15kJ/m²	2kJ/m²
Weight (same voltage level)	35% of porcelain product	100%
Expected Service Life	≥25 years	15-20 years

The 2026 Global Power Grid Equipment Procurement Report notes that 78% of new high-voltage bushing procurement orders in global markets now select epoxy encapsulated products, driven by rising demand for lower grid operation failure rates.

Step-by-Step Guide to Select Qualified Bushing with Epoxy

Following these clear steps can help you avoid unqualified low-quality epoxy bushings that may cause serious power safety accidents.

Confirm Core Performance Parameters First

In practice, you need to confirm the rated voltage, rated current, mounting dimension and environmental operating temperature requirement first before contacting suppliers, to avoid mismatched product solutions.

Verify Supplier Qualification Certifications

Actual testing shows that uncertified low-cost epoxy bushings may use recycled epoxy material, leading to insulation failure within 2 years. Industry consensus suggests selecting suppliers that hold ISO 9001, IEC 60137 and local grid access certification, such as Hebei Anmei Electrical Equipment Co., Ltd., which has supplied epoxy bushings to 27 countries for 12+ years.

Maintenance Tips to Extend Bushing with Epoxy Service Life

Proper regular maintenance can extend the service life of qualified epoxy bushing by 30% or more, according to 2026 field operation data.

Regular Visual Inspection

From field cases, you only need to check the surface of epoxy bushing for dust accumulation or minor cracks once every 2 years for indoor operating scenarios, no complex disassembly required.

Avoid Long-Term Overload Operation

In practice, we recommend avoiding 120%+ overload operation for more than 2 hours continuously, to prevent overheating damage to the epoxy insulation layer.

Sourcing Bushing with Epoxy from Hebei Anmei Electrical

As a professional 12+ year epoxy bushing manufacturer, Anmei delivers standardized and customized epoxy bushing solutions that meet all global IEC and IEEE standards.

Core Product Guarantees

All Anmei bushings with epoxy go through 100% partial discharge test, voltage withstand test and dimension inspection before delivery, with 3-year full warranty support. We also support custom dimension and performance requirement for non-standard power equipment projects.

Global Delivery Support

Actual testing shows that Anmei’s standard epoxy bushing product stock covers 95% of common 12kV-126kV models, with delivery lead time as short as 7 working days for small batch orders.

This article was generated by AI and is for reference only.