Description

H4 Transformer Board Production Description: 1) Pre-compressed Pressboard, with Quality Standard: IEC********1:***2/GB/T ****4.*****3 2) Thickness: 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm 3) Material: **0% unbleached sulfate pulp imported from Canada, Russia. 4) High density, high mechanical strength, high electric strength and low compression index. 5) ***0mm****0, ***0mm****0mm and customized size Transformer pressboard H4 Transformer Board Technical Specifications: Item Unit Specification Standard Thickness mm ≤1.0mm ±6% ≤1.5mm*1.6mm ±6% ≤2.0mm*3.2mm ±4% 4.0mm ±4% ≥5.0mm ±4% Density g/cm3 ≤1.6mm 1.***1.*0 >1.6mm*3.0mm 1.***1.*5 >3.0mm*6.0mm 1.***1.*0 >6.0mm*8.0mm 1.***1.*0 Moisture % 1.0mm*8.0mm ≤6.0% Tensible Strength MD MPa ≤1.6mm ≥**5 >1.6mm*3.0mm ≥**0 >3.0mm*6.0mm ≥**5 >6.0mm*8.0mm ≥**5 CD ≤1.6mm ≥*0 >1.6mm*3.0mm ≥*0 >3.0mm*6.0mm ≥*0 >6.0mm*8.0mm ≥*0 Elongation MD % 1.0mm*8.0mm ≥3 CD 1.0mm*8.0mm ≥4 Ash Content % 1.0mm*8.0mm ≤0.6 Shrinkage MD % 1.0mm*8.0mm ≤0.5 CD 1.0mm*8.0mm ≤0.7 TD 1.0mm*8.0mm ≤5.0 PH of Aqueous Extract / 1.0mm*8.0mm 6.**8.0 Conductivity of Aqueous Extract Ms/m ≤1.6mm ≤4.5 >1.6mm*3.0mm ≤5.0 >3.0mm*6.0mm ≤6.0 >6.0mm*7.0mm ≤7.0 >7.0mm*8.0mm ≤8.0 Compression % ≤1.6mm ≤*0.0 >1.6mm*3.0mm ≤7.5 >3.0mm*6.0mm ≤5.0 >6.0mm*8.0mm ≤4.0 Recoverable factor after Compression % ≤1.6mm ≥*0 >1.6mm*3.0mm ≥*5 >3.0mm*6.0mm ≥*5 >6.0mm*8.0mm ≥*5 Electrical Strength (In air) KV/mm ≤1.6mm ≥*3.0 >1.6mm*3.0mm ≥*3.0 >3.0mm*6.0mm ≥*3.0 >6.0mm*8.0mm ≥*2.0 Oil Absorption % ≤1.6mm ≥*1.0 >1.6mm*3.0mm ≥9.0 >3.0mm*6.0mm ≥7.0 >6.0mm*8.0mm ≥7.0 Electrical Strength (In Oil) KV/mm ≤1.0mm ≥*5 ≥1.5mm*1.6mm ≥*5 >1.6mm*2.0mm ≥*5 >2.0mm*2.5mm ≥*5 >2.5mm*3.0mm ≥*5 >3.0mm*6.0mm ≥*5 >6.0mm*8.0mm ≥*5 PLY Bond Visual Measurement Obvious rough, fibers coming out when tearing Cutting Size Tolerance mm 1.0mm*8.0m