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Temperature classification is F. It is the modifies product of 347 Class F glass fabric laminate. It not only possesses the characteristics of 347 product, but also excellent electrical property and higher voltage resistance. Used as insulating structural parts for huge motors, transmission and distribution equipment as well as nuclear power project with high electrical and mechanical properties at high temperature.
Standard: Q/XB3131-2007
Table 1: Technical requirements
No. | Properties | Unit | Normal Value | ||||
1 | Flexural strength perpendicular to layer | At room temperature | MPa | ≥400 (lengthwise) ≥350 (crosswise) | |||
150±2 | ≥200 (lengthwise) | ||||||
2 | Compressive strength, perpendicular to layer | MPa | ≥350 | ||||
3 | Impact strength parallel to layer (Charpy method) | kJ/m2 | ≥37 (lengthwise) | ||||
≥37 (crosswise) | |||||||
4 | Tensile strength | Lengthwise | MPa | ≥280 | |||
Crosswise | - | ||||||
5 | Electric strength,perpendicular to the layerat 90±2 oil. | MV/m | retails see the standard | ||||
6 | Dielectric constant | Under 48Hz62Hz | - | ||||
under1Hz | ≤5.5 | ||||||
7 | Dissipation factor | Under 48Hz62 Hz | - | ||||
Under 1MHz. | ≤0.04 | ||||||
8 | Density | g/cm3 | 1.72.0 | ||||
9 | Water absorption | % | retails see the standard | ||||
10 | Voltage resistance parallel to layer(at 90±2 oil for 1min | kV | ≥45 | ||||
11 | Insulation resistance parallel to the layer . | At room temperature | MW | ≥1.0×106 | |||
Immersing in water for 24h | ≥5.0×104 | ||||||
12 | Bonding strength | N | ≥6500 | ||||
Class F glass fabric laminated sheet