3240 Epoxy phenolic glass cloth laminated sheet

3420 sheet (epoxy sheet,glass clothsheet)having high mechanical and dielectric properties,fine heat and humidity resistance. 3420 sheet (epoxy sheet,glass clothsheet) used in electrical machine and devices as insulating construction parts in moist cirecumstances and in transformer oil. 3240 sheet is similartoNEMA L1 grade G10sheet. The size of area:1020x2040mm (40"x80");1220x2440mm(48"x96") Thickness:0.5-100mm (0.020"-3.94") Item UnitValueDensity g/cm31.70-1.90Martens heat resistance (LW) ≥ oC200Flexural strength ≥ Perpendicular to lamination parallel to laminationMPa400300Tensile strength ≥ Perpendicular to lamination parallel to laminationMPa350250Bonding ≥ N5680Impact strength ≥ Perpendicular to lamination parallel to lamination kJ/m2150100Surface resistivity ≥ Under normal condition After impregnated in water Ω1×10131×1011Volume resistivity ≥ Under normal condition After impregnated in water Ω.cm1×10131×1011Insulation resistance parallel to lamination ≥ Under normal condition After impregnated in water Ω1×10101×108Loss tangent, 50Hz ≤ -0.05Voltage endurance perpendicular to lamination intransformer oil at 90±2oC ≥ Thickness 0.5-1 mm Thickness 1.1-2 mm Thickness 2.1-3 mm kV/mm222018Voltage endurance parallel to lamination in transformer oil at 90±2oC ≥ kV30