Transformer board
Insulation pressboard is 100% superior sulfate insulation wood pulp.
Standard: IEC60641-3-1: 1992
Aprrarent Density: 1.0-1.3G
Material: Unbleached sulphate pulp thickness: 0.8-8mm
Size: 1mx2m 2mx4m
Color: Brown
Feature: Good mechanical stength, high electric strength resistance, larger tightness, smaller shrinkage, excellent flatness are the main strong strengths of this product.
It be mainly used in the clapboards of transformers
| XUCHANG ZHUFENG INSULATION MATERIAL CO., LTD |
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| Technical data |
| Product Name:Pressboard |
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| Producing StandardIEC60641-3-1:1992 |
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| No. |
Index |
Unit |
Specification |
Standard |
| 1 |
Thickness Deviation |
% |
less 2.0mm |
±6% |
| ≥2.0mm |
±4% |
| 2 |
Density |
g/cm3 |
≤1.6mm |
1.05-1.20 |
| 1.6-3.0mm |
1.15-1.25 |
| 3.0-6.0mm |
1.20-1.30 |
| 3.0-8.0mm |
1.20-1.30 |
| 3 |
Water content |
% |
1.0-8.0mm |
≤6.0 |
| 4 |
Tensile strength |
MD |
N/mm2 |
≤1.6mm |
≥105 |
| 1.6-3.0mm |
≥110 |
| 3.0-6.0mm |
≥115 |
| 3.0-8.0mm |
≥115 |
| CMD |
N/mm2 |
≤1.6mm |
≥80 |
| 1.6-3.0mm |
≥90 |
| 3.0-6.0mm |
≥90 |
| 3.0-8.0mm |
≥90 |
| 5 |
Elongation |
MD |
% |
1.0-8.0mm |
≥3 |
| |
CMD |
% |
1.0-8.0mm |
≥4 |
| 6 |
|
MD |
% |
1.0-8.0mm |
≤0.5 |
| |
Shrinkage |
CMD |
% |
1.0-8.0mm |
≤0.7 |
| |
|
Thickness |
% |
1.0-8.0mm |
≤5.0 |
| 7 |
Ash Content |
% |
1.0-8.0mm |
≤0.6 |
| 8 |
Oil Absorption |
% |
≤1.6mm |
≥11 |
| 1.6-3.0mm |
≥9.0 |
| 3.0-6.0mm |
≥7.0 |
| 3.0-8.0mm |
≥7.0 |
| 9 |
PH of aqueous Extract |
% |
1.0-8.0mm |
6.0-8.0 |
| 10 |
Conductivity of aqueous Extract |
Ms/m |
≤1.6mm |
≤4.5 |
| 1.6-3.0mm |
≤5.0 |
| 3.0-6.0mm |
≤6.0 |
| 6.0-7.0mm |
≤7.0 |
| 7.0-8.0mm |
≤8.0 |
| 11 |
Electric Strength |
In air |
kv/mm |
≤1.6mm |
≥13.0 |
| 1.6-6.0mm |
≥13.0 |
| 6.0-8.0mm |
≥12.0 |
| in oil |
kv/mm |
≤1.6mm |
≥45 |
| 1.6-8.00mm |
≥35 |
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