GPO3 laminate sheet also known as UPGM 203, it is alkali-free fiberglass mat dipped into unsaturated polyester resin adding relevant chemical agent as the basic material pressed under high temperature press into rigid panel as insulating material. This material has good electrical property under high humidity and high mechanical property under medium temperature, it with very nice fire retardant property, good arc resistance and tracking resistance. It's widely used in the low & medium voltage electrical industries such as making of phase and end barriers, insulating supports, bus bar supports and mounting panels in switch-gear and other types of electrical apparatus.
Feature of this material as below
1,Good flatness, it has smooth surface of normal sheet and with the standard thickness tolerances.
2,Low water absorption and good dielectric properties .
3,Stable electrical insulating properties, good electrical properties in dry or wet conditions.
4,High mechanical strength, good processability Punching, Drilling, Machining and Cutting , it can be grinded by machine to meet better thickness tolerance .
5,Good mechanical workability.
|Hong Cheng Grade||HC-GPO3|
|IEC 893 / EN 60893 Grade||UP GM 203|
|DIN 7735 Grade||HM 2471|
|ANSI (NEMA) Grade NEMA LI-1||GPO-3|
|Items||Test Method||Unit||Typical Values|
|Physical Properties||Color||Visual inspection||----||Red/White/Brown/Grey|
|Specific Gravity||IEC 60893-2:2003||g/cm3||1.95-2.05|
|Mechanical properties||Tensile Strength||IEC 60893-2:2003||Mpa||≥130|
|Compressive strength||IEC 60893-2:2003||≥300|
|Flexural Strength||IEC 60893-2:2003||≥180|
|Impact strength||IEC 60893-2:2003||KJ/m2||≥60|
|Electrical properties||Volume Resistivity||IEC 60093:1980||Ω·m||≥ 1.0 x 1010|
|Surface Resistivity||IEC 60093:1980||Ω||≥ 1.0 x 1012|
|Electric Strength ┴||IEC 60893-2:2003||kV/mm||≥ 12|
|Breakdown Voltage //||IEC 60893-2:2003||kV/25mm||≥ 80|
|Arc Resistance||IEC 61621:1997||sec||≥180|
|PTI Proof Tracking Index PTI||IEC 60893-2:2003||---||≥600|
|Dielectric Constant||IEC 60893-2:2003||---||4.0-5.0|
|tgδ Dissipation Factor||IEC 60893-2:2003||---||≤0.03|
|Thermal properties||Coefficient of Thermal Expansion||ASTME 228-11||1/K||≤2x10-5|
|Temperature Index||IEC 60085:2004||℃||155|
|Flame Resistance performance||Oxygen Index||ISO 4589-2:1996||%O2||≥ 30|
|Flame Resistance||IEC 60893-2:2003||---||V-0|
|Toxicant(Emission halogen etc.)||E662||---||
|Other properties||The anti microbial properties of bacteria||G21-G22||---||
GPO-3 laminate sheet performs well in electrical& mechanical applications that requires high arc , carbon track resistance high strength as well as flame resistance, physical strength, and moderate heat resistance. Grade GPO-3 laminate is used extensively in the making of phase and end barriers, insulating supports, bus bar supports and mounting panels in switch gear and other types of electrical apparatus.
As soon as we know , more and more electrical equipment using this material due to mentioned nice electrical and mechanical properties .