In the fast-evolving world of power distribution and electrical control systems, switchgear insulation must meet increasingly stringent safety and performance standards. At XuJue Electrical, we specialize in delivering high-performance GPO-3 insulation sheets engineered to support the safety, reliability, and long-term efficiency of switchgear systems worldwide.
But what makes XuJue’s GPO-3 the smart choice for your switchgear solutions? Here’s everything you need to know.
GPO-3 (Glass Polyester Laminate) is a reinforced thermoset composite made by pressing unsaturated polyester resin with glass fiber mats under high heat and pressure. The result is a robust insulating material with:
► Excellent electrical insulation
► High mechanical strength
► Flame retardancy (UL 94 V-0)
► Thermal stability up to 155°C (Class F)
At XuJue Electrical, we produce GPO-3 sheets in various thicknesses and dimensions, customizable for different industrial applications.
1. Reliable Electrical Insulation
Switchgear operates under high voltages. Our GPO-3 sheets deliver high dielectric strength (>10kV/mm), ensuring insulation integrity and minimizing the risk of short circuits or breakdowns even in demanding environments.
2. Flame & Arc Resistance
Safety comes first. XuJue GPO-3 sheets are UL 94 V-0 certified, meaning they self-extinguish quickly and resist flame spread. With arc resistance exceeding 180 seconds, they provide essential protection in arc-prone systems.
3. Mechanical Durability
In switchgear, components must withstand mechanical stress, vibration, and thermal cycles. Our GPO-3 exhibits excellent impact resistance, flexural strength, and dimensional stability—ideal for long-term use in structural and insulating roles.
4. Precision Machining & Fabrication
XuJue GPO-3 can be easily cut, drilled, and machined into complex shapes with high accuracy. This versatility is essential for custom switchgear parts like busbar supports, phase barriers, and mounting panels.
5. Compliant with International Standards
Our GPO-3 sheets meet IEC 60893-3-5:2009 requirements.
GPO-3 from XuJue Electrical is widely used in:
► Phase separators to prevent arc flash between conductors
► Insulating support plates for circuit breakers and busbars
► Protective panels in medium- and low-voltage switchgear
► Mounting bases for electrical components
► Barriers & flame shields in compact MCCs
Whether you’re building air-insulated switchgear (AIS) or metal-clad units, GPO-3 delivers the performance you need.
| Feature | XuJue GPO-3 | G10 / FR4 | Phenolic Board | PVC/Plastic |
|---|---|---|---|---|
| Dielectric Strength | ★★★★☆ | ★★★★★ | ★★☆☆☆ | ★☆☆☆☆ |
| Flame Retardancy | UL 94 V-0 | V-0 (varies) | Poor | Poor |
| Mechanical Strength | ★★★★☆ | ★★★★☆ | ★★☆☆☆ | ★☆☆☆☆ |
| Thermal Resistance | 155°C (F Class) | 130–150°C | < 120°C | < 100°C |
| Machinability | Easy | Moderate | Good | Easy |
| Cost-Effectiveness | High | Moderate | High | High |
GPO-3 delivers a balanced, cost-effective solution for OEMs and power equipment manufacturers without compromising on safety or performance.
As a trusted supplier of electrical insulation materials, XuJue Electrical brings you:
► Over 68 years of expertise in composite insulation
► Fast delivery and global logistics support
► Custom cutting, CNC machining, and full technical support
► OEM/ODM services for international switchgear brands
Whether you're an electrical panel builder, switchgear manufacturer, or distributor, XuJue offers a reliable supply chain and consistent quality you can count on.
Ready to upgrade your switchgear insulation with GPO-3?
Email: info@ztelecpro.com
Website: www.ztelecpro.com
Global Delivery | Custom Processing | OEM Services Available
