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
Dry-Type Transformers (10-66 kV)
MV Switchgears: CTs, PTs, bushings, circuit breakers
Outdoor Electrical Components
Renewable Energy Infrastructure
Processing Methods
Vacuum Gravity Casting
Automatic Pressure Gelation (APG)
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?
Eco-Compliant: Halogen-free • Low-VOC formulation
Zero Defects: Void-free encapsulation for PD resistance
Lifecycle Efficiency: 30+ year service life in substations
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.
