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     Technical data for laminated transformerboard

No. Property Unit Value
1 Apparent density g/cm3 1.2 - 1.3
2 Moisture content % ≤4.0
3 Shrinkage Thickness % ≤4.0
Otherwise ≤1.0
4 Ash content % ≤0.8
5 Oil absorption % ≥9.0
6 Flexural strength Vertical sheet D N/cm2 ≥100.0
Level Sheet D ≥85.0
7 Elastic strength Vertical sheet D ≥120.0
Level Sheet D ≥50.0
8    Conductivity of aqueous extract Ms/m ≤8.0
9   Electrical break down strength 50Hz KV/mm >6.0

 

 
 
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