product description
Description of GPO-3
GPO-3 is also called UPGM203 plate (Unsatured Polyester Glass Mat Plate). UPGM203 is IEC standard and GPO-3 is NEMA grade. It is kind of rigid plate insulating material, made of alkali-free fiberglass mat impregnated with unsaturated polyester resin, adding relevant chemical agents in heating and pressing to cure into rigid plate.
Standard Color: Red Color, White color
Raw Material: Glass Mat + Unsaturated Polyester Resin
Characteristic of GPO-3
- Strong and stiff
- Good flame and smoke characteristics
- Impact resistant
- Dimensional stability
- Excellent electrical properties( under high humidity)
- Good arc resistance and tracking resistance
Application of GPO-3
Widely used in the low voltage electrical industries such as rail transportation, power generation, wind energy,power transmission anddistribution ,metallurgy, mining, petrochemical, public transportation and other fields.
It always made into insulating structural parts as follow products:
- phase and end barriers
- safety plate,arcing plate
- bus bar supports,insulating supports
- slot wedge
- mounting panels in switch-gear
- shifting cover spacer
- switch cabinet
- motor, gasket, cable clamp
- frame breaker
- other types of electrical apparatus.
Technical data of GPO-3
| No. | Test Items | Unit | Standard Value |
| 1 | Compressive Test | MPa | ≥220 |
| 2 | Deflection Temperature under Load | ℃ | ≥240 |
| 3 | Density | g/cm3 | 1.75~1.95 |
| 4 | Flexural Modulus | MPa | ≥10000 |
| 5 | Shear Strength | MPa | ≥100 |
| 6 | Surface Resistance | Ω | ≥ 1.0x10¹² |
| 7 | Tensile Modulus | GPa | ≥11 |
| 8 | Tensile Strength | MPa | ≥95 |
| 9 | Vertical Burning | / | V0 |
| 10 | Water Absorption | / | ≤ 0.5% |
| 11 | Relative Permittivity & Dissipation Factor | Dissipation Factor | ≤0.015 |
| Dissipation Factor | ≤ 4.5 | ||
| 12 | Charpy Notched Impact Strength | kJ/m2 | >41 |
| 13 |
Dielectric Breakdown Voltage & Dielectric
Strength
|
kV/mm(Vertical direction) | ≥12 |
|
kV(Parallel layer direction)
|
>50 | ||
| 14 | Flexural Strength | MPa(23℃) | ≥130 |
| MPa(130℃) | ≥90 | ||
| 15 | Glowing-Wire Test(GWEPT) | ℃ | GWEPT≥960 |
| 16 | Poisson's Ratio(μb) | / | 0.29-0.39 |
| 17 |
Comparative Tracking Index(CTI)
|
/ | CTI≥600V |
| 18 | Arc resistances | s | ≥180s |
