The LE-8216F/LH-8216F is an epoxy resin system engineered for medium/high-voltage electrical insulation (10-66kV). Featuring a modified weather-resistant anhydride hardener (LH-8216F) and low-shrinkage formulation, it delivers exceptional dimensional stability, superior arc resistance, and HB flammability rating. Ideal for vacuum-cast dry-type transformers, CTs/VTs, and critical insulation components.

Key Features & Advantages

Applications

Built for high-voltage electrical insulation:

Dry-type transformers

Current/voltage transformers (10-66kV)

Bushings, insulators, switchgear

Encapsulation of sensors & relays

Grid infrastructure components

Key Performance Data

*Cured system: LE-8216F/LH-8216F/Silica powder = 100:100:350*

Mechanical & Thermal Properties

Electrical & Safety Properties

| Volume Resistivity | 10¹⁵ Ω·cm | IEC 62631-3-1 |
| Arc Resistance | 181-198 sec | IEC 61621 |
| Tracking Resistance | ≥600 V | IEC 60112 |
| Dielectric Constant | 3.0-4.0 (50Hz) | IEC 60250 |
| Flammability | HB (UL94) | UL94/GB/T2408 |
| Hydrophobicity | HC1 Class | IEC 62073 |

Frequently Asked Questions (FAQ)

Q1: What makes LE-8216F suitable for outdoor HV applications?
A: Its cyclic aliphatic structure provides inherent UV/weather resistance, while low water absorption (0.08-0.15%) ensures stability in humid conditions.

Q2: What is the curing process?
A: Optimized for vacuum casting:

Pre-mix: 60-70°C/1-2h (100-300Pa)

Cure: 70-80°C/3-5h → 90-100°C/2-4h → Post-cure 130°C/12h

Q3: How does filler ratio affect properties?
A: Silica powder (300-360 pbw) enhances mechanical strength but must be uniformly dispersed. Adjust within range to balance viscosity vs. performance.

Q4: Is this system compatible with APG?
A: Designed for vacuum casting. For APG, consult Shanghai Wenyou for formulation adjustments.

Q5: What safety measures are critical?
A: Essential PPE: gloves, goggles, respirator. Maintain ventilation (3-5 air renewals/hour). Avoid skin contact—use barrier cream.