Production Description:
1) Pre-compressed Pressboard, with Quality Standard: IEC60641-3-1:1992/GB/T 19264.3-2003
2) Thickness: 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm
3) Material: 100% unbleached sulfate pulp imported from Canada, Russia.
4) High density, high mechanical strength, high electric strength and low compression index.
5) 4400mm*2200, 6400mm*3200mm 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 | 1.05-1.20 | ||||
>1.6mm-3.0mm | 1.15-1.25 | ||||||
>3.0mm-6.0mm | 1.20-1.30 | ||||||
>6.0mm-8.0mm | 1.20-1.30 | ||||||
Moisture | % | 1.0mm-8.0mm | ≤6.0% | ||||
Tensible Strength | MD | MPa | ≤1.6mm | ≥105 | |||
>1.6mm-3.0mm | ≥110 | ||||||
>3.0mm-6.0mm | ≥115 | ||||||
>6.0mm-8.0mm | ≥115 | ||||||
CD | ≤1.6mm | ≥80 | |||||
>1.6mm-3.0mm | ≥90 | ||||||
>3.0mm-6.0mm | ≥90 | ||||||
>6.0mm-8.0mm | ≥90 | ||||||
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 | 6.0-8.0 | ||||
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 | ≤10.0 | ||||
>1.6mm-3.0mm | ≤7.5 | ||||||
>3.0mm-6.0mm | ≤5.0 | ||||||
>6.0mm-8.0mm | ≤4.0 | ||||||
Recoverable factor after Compression | % | ≤1.6mm | ≥50 | ||||
>1.6mm-3.0mm | ≥55 | ||||||
>3.0mm-6.0mm | ≥55 | ||||||
>6.0mm-8.0mm | ≥55 | ||||||
Electrical Strength (In air) | KV/mm | ≤1.6mm | ≥13.0 | ||||
>1.6mm-3.0mm | ≥13.0 | ||||||
>3.0mm-6.0mm | ≥13.0 | ||||||
>6.0mm-8.0mm | ≥12.0 | ||||||
Oil Absorption | % | ≤1.6mm | ≥11.0 | ||||
>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 | ≥45 | ||||
≥1.5mm-1.6mm | ≥45 | ||||||
>1.6mm-2.0mm | ≥35 | ||||||
>2.0mm-2.5mm | ≥35 | ||||||
>2.5mm-3.0mm | ≥35 | ||||||
>3.0mm-6.0mm | ≥35 | ||||||
>6.0mm-8.0mm | ≥35 | ||||||
PLY Bond | Visual Measurement | Obvious rough, fibers coming out when tearing | |||||
Cutting Size Tolerance | mm | 1.0mm-8.0mm | ±10mm | ||||
Inclination Tolerance | mm | 1.0mm-8.0mm | ±10mm | ||||
Package:
Wrapped with vinyl film for waterproof, weaved material, then core paper packed, and wooden pallets.
