Epoxy Resin For Indoor High-voltage Switchgear Bushings Transformers

The LE-9219K/LH-9219K is a high-performance two-component epoxy resin system designed for medium/high-voltage electrical insulation (12–40.5 kV). Formulated with modified BPA epoxy resin (LE-9219K) and carboxylic anhydride hardener (LH-9219K), it delivers exceptional thermal shock resistance, superior crack resistance, and H-class thermal stability (IEC 60085). Ideal for vacuum casting or APG processes, it ensures reliability in critical indoor electrical components.

Key Features & Advantages

Applications

Perfect for insulating components in indoor high-voltage systems:

• Switchgear contact boxes (12–40.5 kV)

• Bushings, insulators, & encapsulation

• Transformers, sensors, & circuit breakers

• HV insulation products requiring precision casting

Key Performance Data

*Cured system: LE-9219K/LH-9219K/Silica powder = 100:100:350 @ 140°C/10h*

Frequently Asked Questions (FAQ)

Q1: What is the mix ratio for LE-9219K/LH-9219K?
A: Standard ratio is 100:100 pbw (resin:hardener). Filler (silica powder) added at 300–380 pbw.

Q2: How should the hardener be stored?
A: Store in sealed containers at 6–35°C. Avoid moisture exposure. If crystallized, preheat to 70–80°C and stir before use.

Q3: What curing process is recommended?
A: Two options:

Vacuum Casting: Cure 70–80°C/3–5h + 90–100°C/2–4h; Post-cure 130°C/12h.

APG: Mold temp 130–160°C; Post-cure 130–150°C/10–12h.

Q4: Is this system suitable for outdoor use?
A: Designed for indoor electrical insulation only. Hydrophobicity class HC1 (IEC TS 62073).

Q5: What safety measures are required during handling?
A: Mandatory: gloves, goggles, protective clothing. Use ventilation (3–5 air renewals/hour). Avoid skin contact—wash immediately if exposed.

Shanghai Wenyou Industry Co., Ltd.mainly engaged in the advanced materialsof MV and HV insulation products for indoorand outdoor use, both suitable for APG andvacuum casting.

Our wide range of products includes epoxy resin, flame retardant resin, curing agents, outdoor modifiers, toughening agents, epoxy paste, demoulding agents, and fillers.

We have obtained ISO9001, ISO14001, SGS, and UL certifications, and our products comply with ROHS and REACH safety regulations.

Our high-quality products are used in high voltage electrical insulation applications and are exported globally. We are committed to providing stable products and excellent service to the global electricity industry.

High Quality Electrical Raw Materials
Epoxy resin

Release agent

Silica powder
Hardener
Color paste
Flexibilizer