GPO-3 Sheet

Product Introduction

GPO-3 sheet 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

gpo-3 board

Characteristic of GPO-3

Strong and stiff

Good flame and smoke characteristics

Impact resistant and Dimensional stability

Excellent electrical properties( under high humidity)

Good arc resistance and tracking resistance

GPO-3 glass reinforced thermoset polyester sheets, also known as “Red Barrier Board” in construction applications.

GPO-3 laminate performs well in electrical applications that require high arc and carbon track resistance as well as flame resistance, physical strength, and moderate heat resistance.

GPO-3 laminate is used extensively in the making of phase and end barriers, insulating supports, bus bar supports and mounting panels in switchgear and other types of electrical apparatus.

GPO-3 is a UL recognized product with a temperature index of 120 degrees celsius electrical and 140 degrees celsius mechanical, and is molded in thicknesses of 1/32″ (.031″) to 2.00″ thick.

Technical data of GPO-3 sheet

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	≥ 1.0×10¹²
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
11	Relative Permittivity & Dissipation Factor	Dissipation Factor	≤ 4.5
12	Charpy Notched Impact Strength	KJ/M2	>41
13	Dielectric Breakdown Voltage & Dielectric Strength	KV/Mm(Vertical Direction)	≥12
13	Dielectric Breakdown Voltage & Dielectric Strength	KV(Parallel Layer Direction)	>50
14	Flexural Strength	MPa(23℃)	≥130
14	Flexural Strength	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

GPO-3 Insulation Machined Parts

GPO3 machined parts can be customized according to customer provided drawings

GPO-3 parts

Application of GPO-3 board：

The GPO-3 board is widely used for electrical insulating applications. GPO-3 is also used for mechanical applications where strength, stiffness, dimensional stability, and relatively low cost are required.

Application area: circuit breaker, motors and so on.

The application of circuit breaker: frame circuit breaker: safety baffle, safety cover, spacer gasket, interphase partition, etc.

The application of molded case circuit breaker: interphase partition, arc extinguishing chamber spacer plate, etc.

The application of motors: Motor armature parts, movable cover plate, slot wedge stator, fixed gasket, thin gasket, carbon brush seat, etc.

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