Transformer Insulation Boards

Following are the specifications of Transformer Insulation Boards:
1) Pre-compressed Press board, 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 press board


ItemUnitSpecificationStandard

Thicknessmma 1.0mmA 6%
a 1.5mm-1.6mmA 6%
a 2.0mm-3.2mmA 4%
4.0mmA 4%
a Y5.0mmA 4%
Densityg/cm3a 1.6mm1.05-1.20
>1.6mm-3.0mm1.15-1.25
>3.0mm-6.0mm1.20-1.30
>6.0mm-8.0mm1.20-1.30
Moisture%1.0mm-8.0mma 6.0%
Tensible StrengthMDMPaa 1.6mma Y105
>1.6mm-3.0mma Y110
>3.0mm-6.0mma Y115
>6.0mm-8.0mma Y115
CDa 1.6mma Y80
>1.6mm-3.0mma Y90
>3.0mm-6.0mma Y90
>6.0mm-8.0mma Y90
ElongationMD%1.0mm-8.0mma Y3
CD1.0mm-8.0mma Y4
Ash Content%1.0mm-8.0mma 0.6
ShrinkageMD%1.0mm-8.0mma 0.5
CD1.0mm-8.0mma 0.7
TD1.0mm-8.0mma 5.0
PH of Aqueous Extract/1.0mm-8.0mm6.0-8.0
Conductivity of Aqueous ExtractMs/ma 1.6mma 4.5
>1.6mm-3.0mma 5.0
>3.0mm-6.0mma 6.0
>6.0mm-7.0mma 7.0
>7.0mm-8.0mma 8.0
Compression%a 1.6mma 10.0
>1.6mm-3.0mma 7.5
>3.0mm-6.0mma 5.0
>6.0mm-8.0mma 4.0