Heat-resistant Insulation Laminated Pressboard Pressboard/presspaper For Oil Transformer Material White Mica Dielectric Tube
Heat-resistant insulation material laminated pressboard for transformer
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Thickness tolerance | IEC 641-2 | ≤ 1.6 mm 6.00 % | ±7.5 % |
> 1.6 - 8.0 mm 4.00 % | ± 5.0 % | ||
Apparent density | IEC 641-2 | ≤ 1.6 mm 1.09 g/cm³ | 1.00 - 1.20 g/cm³ |
> 1.6 - 4.0 mm 1.15 g/cm³ | 1.10 - 1.25 g/cm³ | ||
Min. tensile strength M.D. unfolded | IEC 641-2 | ≤ 1.6 mm 107 N/mm² | 100 N/mm² |
> 1.6 - 4.0 mm 128 N/mm² | 105 N/mm² | ||
Min. tensile strength C.M.D, unfolded | IEC 641-2 | ≤ 1.6 mm 77 N/mm² | 75 N/mm² |
> 1.6 - 4.0 mm 83 N/mm² | 80 N/mm² | ||
Min. elongation M.D, unfolded | IEC 641-2 | 3.90% | 3.00% |
Min. elongation C.M.D, unfolded | IEC 641-2 | 4.10% | 4.00% |
Max. moisture content | IEC 641-2 | 4.20% | 6.00% |
Max. ash content | IEC 641-2 | 0.30% | 1.00% |
pH of aqueous extract | IEC 641-2 | 6.3 | 6.0 - 9.0 |
Max. shrinkage M.D | IEC 641-2 | 0.40% | 0.50% |
Max. shrinkage C.M.D | IEC 641-2 | 0.60% | 0.70% |
Max. thickness shrinkage | IEC 641-2 | 3.90% | 5.00% |
Min. oil absorption | IEC 641-2 | ≤ 1.6 mm 13.7 % | 11.00% |
> 1.6 - 4.0 mm 10.6 % | 9.00% | ||
Compressibility C | IEC 641-2 | ≤ 1.6 mm 9.4 % | 10.00% |
> 1.6 - 4.0 mm 5.7 % | 7.50% | ||
Revers. part of compressibility Crev | IEC 641-2 | ≤ 1.6 mm 54 % | 45% |
> 1.6 - 4.0 mm 71 % | 50% | ||
Min. breakdown voltage in oil | IEC 641-2 | ≤ 1.6 mm 50 kV/mm | 40 kV/mm |
> 1.6 - 4.0 mm 45 kV/mm | 35 kV/mm | ||
Max. conductivity of aqueous extract | IEC 641-2 | ≤ 1.6 mm 3.3 mS/m | 5.0 mS/m |
> 1.6 - 4.0 mm 3.5 mS/m | 6.0 mS/m |
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Product description of thick cardboard sheets Pressboard PSP3052 (Transformer Board PSP3052) is a special product based on pure cellulose taken from long-fibred coniferous wood. This is structured into a fibrous tissue without additional adhesive and then pressed. Due to its high chemical purity, pressboard is excellently suited as an insulation material in electric machines, capacitors and oil-filled transformers.
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Product Application ofthick cardboard sheets To use as insulation material in Power and Distribution Transformers
It is the base material for components like cyclinder, strips, spacers, rings. washers, plates, machine formed and moulded parts, punching and laminates.
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