Transformer Insulation Pressboard

H4 Transformer Insulation Pressboard
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:
Large Size:4400*1600mm,4200*2100mm,4000*2000mm; Medium Size: 2200*1600mm,2200*1470mm,2200*1400mm; Small Size: 2200*1100mm, 2200*1000mm,2000*1000mm.


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

Usage:
Mainly used in oil-immersed transformer as insulation material, also used in reactor mutual inductance ware, electric device and etc.

Package:
Wrapped with vinyl film for waterproof, weaved material, then core paper packed, and wooden pallets.

Contact Person: Sarah Niu
Mob: 0086 13455649857
Skype: sarahniu2006
Email: hscorepaper AT gmail.com
MSN: sarahniu2006 AT hotmail.com