GPO3 Electrical Red Fiberglass Sheet 1/8" Thick x 12.0" Wide x 24.0" Long

Description

GPO3 Electrical Red Fiberglass Sheet 1/8" Thick x 12.0" Wide x 24.0" Long
Thickness:  3/32"
Thickness Tolerance:  +/-.010"
Width Inch:  12.0"
Length Inch: 24.0"
NEMA GPO3
Mil-I-24768/6
IEC 60893-1, UP GM 203
UL File # E82624
Width Tolerances:  +/- 1/8"
Length Tolerances:  +/- 1/8"
GPO-3 Sheets are used in electrical applications that require high arc and carbon track resistance as well as flame resistance, physical strength, and moderate heat resistance.
Fiberglass has internal stresses built up inside of the sheet. When a sheet is cut, it relieves that stress. As a result, the piece that is cut, especially for thinner sheets,
warp and creep may occur in the center area of the sheet.
Fiberglass has a balanced stress state with respect to the shape centerline. When Cutting to size, more material is removed from one side of the centerline than the other,
the material will “dish up” towards the side with more material removed. The amount of residual stress locked into the material determines how much the material will move
once the outer material is removed.
The same condition exists in metals. However, the lower stiffness of fiberglass makes the magnitude of this more significant.
General Information
Unit
ASTM/UL TEST NO.
Values
NEMA Grade
GPO-3
Mechanical Properties
Tensile Strength
psi
D638
10,000
Flexural Strength
psi
D790
23,200
Compressive Strength
psi
D695
32,800
Flexural Modules
psi x 10
6
D790
1.23
Shear Strength
psi
D732
14,000
Izod Impact Strength (notched)
ft-lb/in
D256
8.2
Water Absorption
% by weight
D570
0.21
Barcol hardness
D2583
50
Specific Properties
D792
1.8
Electric Properties
Dielectric Strength (- in oil)
volts/mil
D149
400
Dielectric Strength (Parallel in oil)
kV
D149
57
High Voltage Arc Resistance
sec
D495
200+
Dielectric Constant @ 60 Hz
D150
4.8
Dielectric Constant @ M Hz
D150
4.7
Dissipation Factor @ 60 Hz
D150
0.013
Dissipation Factor @ M Hz
D150
0.011
Comparative Tracking Index
volts
D3638
500+
Flame Resistance Properties
U.L. Subject 94
UL94
94VO
Thermal Properties
Coefficient of Thermal Expansion
in/in/C x 10
-5
D696
2
Thermal Conductivity
btu/hr/ft
2
/in/F
C177
1.9
U.L. Temperature Index-Electrical
C
UL746B
120
U.L. Temperature Index-Mechanical
C
UL746B
140
Width and Length Tolerance +/- 3/16"
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