Thermal Shock Resistant Epoxy Curing Agent for MV Switchgear Encapsulation & Protection
Environmentally Friendly Epoxy Resin System for Transformers & MV Switchgears
LE-8213 Epoxy Resin + LH-8213 Hardener
Product Overview
LE-8213/LH-8213 is a saturated cyclic aliphatic epoxy resin system engineered for high-voltage electrical insulation. Designed for sustainability and extreme reliability, this two-component system delivers exceptional thermal shock resistance (-40°C to +150°C), low curing shrinkage, and UV/weather stability. Ideal for encapsulating MV switchgears, dry-type transformers, and critical grid components.
Key Features & Benefits
| Property | Performance |
|---|---|
| Thermal Resilience | Withstands 1,000+ cycles (-40°C ↔ +150°C) |
| Electrical Safety | Dielectric strength >18 kV/mm • Partial discharge <5 pC |
| Environmental Resistance | UV stable • Moisture impermeable • Chemical inert |
| Processing Flexibility | Low viscosity • Zero filler pre-mix • Room-temp liquid |
| Mechanical Integrity | Compressive strength >120 MPa • CTE <45 ppm/K |
Applications
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Dry-Type Transformers (10-66 kV)
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MV Switchgears: CTs, PTs, bushings, circuit breakers
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Outdoor Electrical Components
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Renewable Energy Infrastructure
Processing Methods
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Vacuum Gravity Casting
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Optimal for complex geometries
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Eliminates air pockets in windings
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Automatic Pressure Gelation (APG)
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50% faster cycle times vs. conventional casting
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Precision molding for high-volume production
Customizable to existing manufacturing workflows
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Recommended Formulation
| Component | Material | Ratio (pbw) |
|---|---|---|
| Epoxy Resin | LE-8213 | 100 |
| Hardener | LH-8213 (Weather-resistant anhydride) | 100 |
| Filler | Silica Powder | 300-380 |
| Colorant | LC Series Paste | As required |
Critical Properties
| Category | Parameter | Value |
|---|---|---|
| Electrical | Volume Resistivity | >1×10<sup>15</sup> Ω·cm |
| Comparative Tracking Index | >600 V | |
| Thermal | Glass Transition Temp (T<sub>g</sub>) | >125°C |
| Thermal Conductivity | 0.7-1.1 W/m·K | |
| Mechanical | Flexural Strength | >95 MPa |
| Curing Shrinkage | <0.3% |
Why Choose LE-8213/LH-8213?
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Eco-Compliant: Halogen-free • Low-VOC formulation
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Zero Defects: Void-free encapsulation for PD resistance
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Lifecycle Efficiency: 30+ year service life in substations
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Cost-Reduction: Minimizes downtime & maintenance
Optimized for grid resilience – Trusted by global manufacturers for switchgear insulation, transformer coils, and renewable energy systems requiring uncompromising dielectric performance under thermal cycling stress.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.