一、Electrical Paperboard
Transformer electrical Press board/Paperboard/Cardboard/Pre-compressed Board is made with high grade unbleached Sulphate wood pulp ,having characteristics of high mechanical strength, electrical strength, tensile strength, high elongation, low compressibility and proper bending resistance. Used in oil filled transformers as an insulation barrier between HV and LV windings and the winding end area which can increase the electrical strength of the oil.
二、 Basic Performance
Item |
Indicate |
Type |
B.3.1A |
Standard |
gB/T19264.3-2003/Iec60641-3-1:2008 |
Apparent Density |
1.0-1.3g/cm3 |
Thickness |
1.0~10.0mm |
Moisture content |
≤ 6% |
Raw Material | 100% high purity sulphate pulp |
Application | Strips, cylinders, Spacers, Plates, end ring |
Special | good elongation, high flatness, high mechanical and electrical strength |
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三、Technical Data
Property | unit | Index | |||
≤ 1.6mm | 1.6-3.0mm | 3.0-6.0mm | 6.0-8.0mm | ||
Thickness Deviation | % | ±7 | ±4.5 | ||
Apparent Density | g/cm3 | 1.00-1.20 | 1.10-1.25 | 1.15-1.30 | 1.20-1.30 |
Tensile Strength MD | MPa | 100 | 105 | 110 | 110 |
Tensile Strength cD | MPa | 75 | 80 | 85 | 85 |
compressibility | % | 10.0 | 7.5 | 5.0 | 4.0 |
conductivity of Aqueous extract | mS/m | 5.0 | 6.0 | 8.0 | 10.0 |
Oil Absorption | % | 11 | 9 | 7 | 7 |
electrical Strength in air | kV/mm | 12 | 11 | 10 | 9 |
electrical Strength in oil | kV/mm | 40 | 35 | 30 | 30 |
elongation MD | MPa | 3.0 | |||
elongation cD | MPa | 4.0 | |||
Shrinkage MD | % | 0.5 | |||
Shrinkage cD | % | 0.7 | |||
Moisture content | % | 6.0 | |||
Ash content | % | 1.0 | |||
