Zhongtian Electric equipment & insulation material

3520 Phenolic Paper Laminated Tube Characteristics and application: Temperature classification is E. It is made of insulation paper as base and phenolic resin as the adhesive, though heated rolled and pressed. Good dielectric property under dry state. Used as insulating structural  parts of electrical  apparatus in transformer oil. NO. Item Unit Normal Value 1 Density g/cm3 ≥1.10 2 Water Absorption % Refer to standard 3 Thermal stability for 24 h ℃ 120 4 Flexural strength N/mm ² ≥60 5 Compressive strength N/mm ² ≥60 6 （50HZ）Dissipation factor – ≤0.03 7 Voltage resistance perpendicular to the Layer direction at 90±2℃ transformer oil For 5 min mm Wall thickness ≥ MV/m ≥8.5 ≥ ≥8.0 ≥ ≥7.0 ≥ ≥6.5 ≥ ≥6.0 8 Voltage resistance parallel to the layer direction at 90±2℃ transformer oil for 5 min KV 25 9 Surface voltage resistance after being humidified in the air at room temperature for 1 min KV 12

Phenolic Paper Laminated Sheet Phenolic paper laminated sheet（Phenolic sheet, Bakelite）. Phenolic paper sheet can be processed into all kinds of insulation parts, The products are widely used transformers, electric motors, electric switches etc. It is also can be used in transformer oil. Phenolic paper laminated sheet（Phenolic sheet ,Bakelite） No. Item Units Value 1 Applicable Standards GB1302-77 3 Thermal stability Thickness≤20mm ℃ 125 Thickness＞20mm 100 4 Tensile strength ≥ MPa 78.4 5 Flexural strength ≥ Flexural strength ≥ 98 6 Impact strength ≥ kJ/㎡ kJ/㎡ 12 7 Bonding strength ≥ N 3528 8 Surface resistance ≥ Unde rnormal condition Ω _ Impregnated in water 9 Specific volume resistance≥ Under normal condition Ω _ Impregnated in water 10 Insulation resistance parallel to lamination≥ Under normal condition Ω 1.0×1010 Impregnated in water 1.0×108 11 Voltage endurance parallel to lamination（in oil 20±5℃）,5 minutes ≥ kV 16 12 V...

3025 Phenolic Cotton Cloth Laminated Sheet It is made of cotton cloth impregnated phenolic resin by processing under heat and pressure. This sheet can be processed into all kinds of insulation parts of machinery and electrical equipment that require high electrical requirements

3240 Epoxy Phenolic Glass Cloth Laminated Sheet It is laminated by pressing plate machine with alkali-free glass cloth impregnated by epoxy resin and phenolic resin. Its heat-resistant is Class B(130℃) ,and it widely apply to transformer, motor, control box and so on with good dielectric properties, mechanical properties and wet resistant properties. We can also produce all kinds of insulating parts with epoxy phenolic glass cloth laminated sheet as customer’s requirement. Epoxy phenolic glass cloth laminated sheet No Item Unit Value 3240 3240B 3240C 1 Sandard – GB1303-77 QB 2 Density g/cm3 1.7-1.9 1.8-2.0 1.8-2.0 3 Martens heat resistance ℃ 200 200 200 4 Flexural strength perpendicular to laminations ≥ Mpa 340 300 280 5 Bonding strength ≥ N 5600 5000 4800 6 Impact strength parallel to laminations (charpy) ≥ KJ/m2 33 30 28 7 Lose factor(48-62Hz) ≦ – 0.05 – – 8 Relative permittivity 48-62 Hz ≦ – 0.5 – – 9 Voltage endurance perpendicular to la...

Epoxy Glass Cloth Llaminated Sheet (G10 /FR4/ G11 ) The product is made of alkali-free glass cloth impregnated by epoxy resin by processing under heat and pressure. It has high dielectric and good mechanical properties. It is F class material. G10 sheet exhibits extremely high mechanical strength at room temperature, good dielectric loss and electric strength properties under both dry and humid conditions. The product can be widely used as insulating structural parts for F class motors, apparatuses as well as electronic industry FR4 is like G10, But with certain flame retardant properties. It is suitable for the F grade electrical machinery and electrical equipment which is used for the flame retardant requirements. G11 is like G10. It has high mechanical strength at high temperature. The product can be widely used as insulating structural parts for F class motors, apparatuses as well as ele...

EPGC Sheet The product is made of alkali-free glass cloth impregnated by epoxy resin by processing under heat and pressure. It has high dielectric and good mechanical properties. EPGC201 sheet: 　 High mechanical applications in middle grade temperature, stable electrical applications in high humidity conditions, suitable for as insulation structural parts of Class F machinery and electric equipment. EPGC202 sheet: Similar to EPGC201, with flame resistance, good electrical applications in high humidity conditions, suitable as insulation structural parts for Class F machinery and electric equipment that require flame resistance EPGC203 sheet: Similar to EPGC201, with high mechanical applications, chemical resistance, and permanent insulation strength in high temperature, Suitable as insulation structure for Class F machinery, electrical equipment and chemical corrosive environment application. EPGC204 sheet: Similar to EPGC201 sheet, with flame resistan...