3520 Phenolic Laminated Paper Tube
Product Description
3520 Phenolic Laminated Paper Tube is a premium-grade electrical insulation material manufactured by winding insulation paper impregnated with high-quality phenolic resin under heat and pressure. It exhibits outstanding dielectric properties in dry states and high thermal stability, making it a highly reliable insulation structural component for heavy-duty electrical machinery.
1, Structure (composition): insulation winding paper, phenolic resin;
2, Performance (summary): the dielectric property is good in dry state;
3, Application (purpose): suitable for dry environment and transformer oil as insulation structure parts of electrical equipment;
4, Minimum inner diameter ɸ10; maximum outer diameter ɸ800; minimum wall thickness: 2mm;
Product Specifications
|
No . |
Indicator |
Unit |
Index value |
|||
|
Inner diameter (5~25mm) |
Inner diameter (Over 25mm ) |
|||||
|
1 |
Density |
g/cm3 |
≥1.03 |
≥1.10 |
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|
2 |
Water absorption rate |
% |
≤the value of Table 5 |
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|
3 |
Thermal stability (24h) |
°C |
120 |
120 |
||
|
4 |
Bending strength (Mpa) |
N/mm2 |
≥50.0 |
≥60.0 |
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|
5 |
Compression strength (Mpa) |
N/mm2 |
≥50.0 |
≥60.0 |
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|
6 |
Dielectric loss factor 50Hz |
— |
≤0.03 |
≤0.03 |
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|
7 |
Vertical layer withstand voltage (90°C±2°C / 5min in transformer oil) |
Wall thickness |
1.5~2.5mm |
MV/m |
≥8.5 |
≥8.5 |
|
2.5~3.5mm |
≥8.0 |
≥8.0 |
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|
3.5~4.5mm |
≥7.0 |
≥7.0 |
||||
|
4.5~6mm |
≥6.5 |
≥6.5 |
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|
6~9mm |
≥6.0 |
≥6.0 |
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|
8 |
Parallel layer withstand voltage (20 °C ±5 °C / 5min in transformer oil) |
kV |
20 |
25 |
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|
9 |
Surface voltage withstand (after exposure to moisture, withstand voltage 1min in normal air) |
kV |
12 |
12 |
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|
Table |
||||||
|
Wall t hickness/mm |
1.5 |
3 |
5 |
7 |
10 |
13 |
|
Water absorption (%) |
10 |
8 |
6 |
5 |
4 |
3 |
