GPO-3 laminated sheet introduction GPO-3 laminate is a rigid plate-shaped insulating material made of alkali-free gl...
GPO-3 laminate is a rigid plate-shaped insulating material made of alkali-free glass fiber felt impregnated with unsaturated polyester resin and added with corresponding additives through hot pressing. GPO-3, also known as UPGM-203, refers to unsaturated polyester glass fiber felt material, which is used for mechanical and electrical purposes. It has good electrical properties under high humidity, good mechanical properties under medium temperature, flame retardancy, and good arc resistance and anti-slip trace resistance.
GPO-3 laminate sheet is widely used in many industrial fields due to its excellent electrical insulation, mechanical strength, chemical corrosion resistance and flame retardancy. The following are its common application cases and specific descriptions:
Transformer and motor components
Transformer skeleton/coil skeleton: GPO-3 is used as an insulating structural member to support the coil. Its high temperature resistance and arc resistance can prevent short circuits.
Motor slot wedge: Used to fix the motor winding, it has strong impact resistance and does not deform during long-term operation.
Switchgear and circuit breakers
Arc extinguishing cover/contact support: Withstand the high temperature of high-voltage arcs to prevent insulation breakdown (arc resistance of more than 180 seconds).
Switch cabinet partition: Flame retardant (UL94 V-0) and low water absorption (<0.1%), ensuring safety in humid environments.
Example scenario
Low-voltage distribution cabinet: As an insulating partition to prevent phase-to-phase short circuit.
High-voltage circuit breaker: Insulating lining in the arc extinguishing chamber, resistant to frequent arc shocks.
Pantograph insulation board
Insulating substrate used for pantographs on the roof of electric locomotives, resistant to ultraviolet aging, and adaptable to harsh outdoor climates.
High-speed rail/subway electrical box
Control cabinet lining board: Flame retardant and resistant to humidity and heat, ensuring long-term stable operation of the electrical system.
Cable bracket: High-strength support cable to avoid breakage caused by mechanical vibration.
Photovoltaic system
Inverter insulation board: High temperature resistant (above 130°C) and corrosion resistant, suitable for harsh environments such as deserts and coastal areas.
Junction box support: Ensure the insulation safety of photovoltaic module current transmission.
Wind power equipment
Converter insulation components: Resistant to salt spray corrosion, extending the service life of offshore wind turbines.
Control cabinet structural parts: Anti-vibration fatigue, adapt to the dynamic load inside the fan tower.
Chemical anti-corrosion lining
Used for reactors and pipeline linings, resistant to acid, alkali, and organic solvent corrosion (such as sulfuric acid and benzene).
Pump valve sealing gasket
High dimensional stability, better sealing performance than ordinary rubber, longer life.
Industrial robot insulation parts
Insulation bracket inside the robot arm to prevent high-voltage lines from interfering with signal transmission.
Electrical system of new energy vehicles
Battery pack insulation partition: Flame retardancy ensures safety during thermal runaway of the battery.
Charging pile insulation structure: High voltage resistance (20 kV/mm dielectric strength) and weather resistance are suitable for outdoor charging scenarios.
Traditional automobiles
Ignition coil skeleton: High temperature aging resistance to avoid insulation failure caused by high temperature in the engine compartment.
Electrical Junction Box/Distribution Box
Insulation lining of wall-embedded distribution box, in compliance with building fire protection standards (such as UL94 V-0).
Outdoor Insulation Protective Cover
The housing of street light control box and base station distribution equipment is UV-resistant and has a service life of more than 10 years.
Medical Equipment
X-ray Machine Insulation Bracket: Halogen-free and environmentally friendly, avoiding the release of toxic gases, and meeting medical equipment safety standards.
Marine Electrical System
Cabin cable trough plate, resistant to salt spray corrosion and hot and humid environment.
Replacing traditional materials: Compared with phenolic laminates: GPO-3 has higher mechanical strength, no formaldehyde release, and is more environmentally friendly. Compared with epoxy boards (such as FR-4): The cost is about 30% lower, suitable for medium and low voltage scenarios. Comprehensive Performance Advantages: Meet the requirements of insulation, structural support and environmental resistance at the same time, reducing the complexity of component assembly.
GPO-3 laminates are used in a wide range of applications, from traditional power equipment to new energy, rail transit and other high-growth areas. Its core value lies in providing reliable insulation and mechanical properties at a low cost. For example, in photovoltaic inverters, it can withstand high temperatures and arcs while avoiding performance degradation due to moisture absorption. It is a preferred material that takes into account safety, durability and economy.
ZTelec Group is a professional manufacturer of high-quality electrical insulation materials, integrating the research and development, production and sales of electrical and electrical insulation materials. It has more than 65 years of manufacturing experience. The production capacity and market share of insulation materials are ranked top three in the industry, and special insulation materials are ranked first.
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Time:06-06 2025
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