In the fields of high-voltage electrical equipment, industrial automation, and power transformers, the performance of insulation materials directly affects the safety, stability, and service life of the equipment. EPGC308 insulation board is a high-performance epoxy glass fiber laminate material with excellent electrical properties, high mechanical strength, and reliable heat resistance. It is widely used in various high-end electrical and industrial equipment. This article, as a technical description of professional EPGC308 insulation board manufacturers, will systematically introduce the material’s performance characteristics, application scope, and considerations for procurement.
EPGC308 insulation board uses glass fiber cloth as the reinforcing substrate and epoxy resin as the bonding matrix, manufactured through a high-temperature, high-pressure lamination process. It fully complies with the technical requirements of high-grade epoxy laminates in IEC standards and is suitable for medium- and high-voltage electrical systems.
Compared to ordinary epoxy boards, EPGC308 insulation board exhibits better performance in heat resistance, mechanical strength, and moisture resistance, making it suitable for applications with high equipment reliability requirements.

Excellent Electrical Insulation Performance: High dielectric strength and low dielectric loss
High Mechanical Strength: High flexural strength and good impact toughness
Stable Thermal Performance: Long-term operation at 180℃ (Class H)
Low Water Absorption: Resistant to humid environments and exhibits good dimensional stability
Good Machining Performance: Supports conventional machining processes such as cutting, drilling, and turning.
Winding End Insulation Components
Clamps and Supports
Insulation Dividers and Pads
Structural Support Insulation Components
High-Temperature, High-Stress Insulation Areas
The stable electrical and mechanical properties of this material help improve the safety level of transformers and extend equipment service life.
Oil-Immersed Transformers: Electrical laminated wood has good resistance to transformer oil and high compatibility with oil-immersed transformers.
Dry-type transformers: The flame-retardant properties of electrical laminated wood meet relevant fire protection standards.
Special transformers: Electrical laminated wood is suitable for high-temperature and high-humidity operating environments.

Besides the transformer industry, EPGC308 insulation boards can also be used in the following fields:
Motors and generators: slot wedges, insulating gaskets, end support components
High-voltage switchgear: partitions, supports, operating mechanism insulation components
Power electronic equipment: heat dissipation insulating substrates, structural support components
Rail transportation: traction transformers, traction motor insulation components
New energy field: wind power converters, photovoltaic inverter insulation components
As a professional manufacturer, we possess the following advantages:
Each batch of raw materials is tested to ensure the quality of fiberglass cloth and epoxy resin.
The production process is monitored in real time, and process parameters are adjusted promptly.
All finished products undergo electrical performance testing to ensure consistent product performance.
Products comply with standards such as IEC 60893 and GB/T 1303.
Using a fully automated impregnation production line ensures uniform resin distribution.
Equipped with an intelligent hot-pressing system for precise temperature and pressure control.
We can produce products in various specifications with thicknesses ranging from 0.5mm to 80mm.
The maximum material width is 1020mm × 2020mm, meeting the processing needs of large components.
Providing material selection advice based on the customer’s usage environment.
Assisting in solving technical problems in material processing and use.
Providing sample testing and technical parameter verification services.
Supporting the customization of products with special performance requirements.

♦ Clearly define material thickness, dimensional tolerances, and overall size requirements.
♦ Confirm the material’s heat resistance and insulation class.
♦ Require suppliers to provide type test reports and factory inspection reports.
♦ Assess the supplier’s supply stability and delivery capabilities.
♦ Pay attention to moisture-proof measures during product packaging and transportation.
Whether you are a transformer manufacturer, electrical equipment producer, or industrial user, we can provide professional technical support and customized product solutions.
Contact us to obtain detailed technical information on EPGC308 insulation boards, free sample testing opportunities, and competitive product quotations. Our technical team will recommend suitable product specifications and supporting solutions based on your specific needs.
If you need our products please write down any questions, we will reply as soon as possible.
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