Products Description
Insulated Pressboard for Transformer is a high-density fiber insulation material specifically designed for use in electrical equipment such as power transformers and instrument transformers. Made primarily from 100% pure sulfate wood pulp pressed under high temperature and pressure, it contains no adhesives or fillers and exhibits excellent electrical insulation, mechanical strength, and heat resistance.
Thickness: ≥0.50mm Product parameters
|
NO. |
ITEMS |
UNIT |
STANDARD VALUE |
|||
|
£1.6mm |
>1.6mm~ 3.0mm |
>3.0mm~6.0mm |
||||
|
1 |
Thickness Tolerance |
% |
±7.5 |
±5.0 |
±5.0 |
|
|
2 |
Density of the surface |
g/cm3 |
1.0-1-2 |
1.1-1.25 |
1.15-1.30 |
|
|
4 |
Elongation strength |
MD |
MPa |
³100 |
³105 |
³110 |
|
CD |
MPa |
³75 |
³80 |
³85 |
||
|
5 |
Shrinkable rate |
MD |
% |
≤0.5 |
||
|
CMD |
% |
≤0.7 |
||||
|
thickness |
% |
≤5.0 |
||||
|
6 |
Moisture content |
% |
£6.0 |
|||
|
7 |
Ash content |
% |
£1.0 |
|||
|
8 |
Conduction of aqueous extract |
mS/m |
≤5.0 |
≤6.0 |
≤8.0 |
|
|
9 |
PH of aqueous extract |
6.0-9.0 |
||||
|
10 |
Electrical strength in oil |
Kv/mm |
³40 |
³35 |
³30 |
|
Note:
Importance in Transformers
--Long-term reliability: It directly impacts the transformer's service life and withstand voltage.
--Stable mechanical properties: It can withstand the impact of short circuits without deformation.
--Processability: It can be cut, stamped, and bent into various shapes, facilitating customization of various insulation components.
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Application scenarios
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