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Laminated Densified Wood
Electrical laminated wood is widely used as insulating and supporting material in transformers and current transformers.
It is good to adapted specific gravity, high mechanical properties, easy vacuum drying, easy mechanical processing etc..
The dielectric constant of laminated wood is close to transformer oil, so it makes a good performance for insulating.
And it can be used in transformer oil of 105℃ for long time.
The Laminated Wood can be made to upper/lower pressure pieces, cable supporting beams, limbs, spacer blocks in oil-immersed transformers, and clamps in instrument transformers. It replaced steel plates, insulating paper sheets, epoxy paper sheets, epoxide woven glass fabric lamination in these fields, and cutted down the material expenses and weight of transformers.
Electrical Laminated Wood Technical Data Sheet:
|
Capability |
Unit |
Max or Min |
Model |
|||
|
Veneers technical data |
Rings technical data |
|||||
|
C2B |
C3B |
T2B |
T4B |
|||
|
Density |
g/cm3 |
Range |
0.9-1.1 |
1.1-1.2 |
1.0-1.1 |
1.2-1.3 |
|
Moisture |
% |
Max |
6 |
6 |
8 |
8 |
|
Vertical layer direction |
Mpa |
Min |
55 |
65 |
100 |
140 |
|
flexural strength |
||||||
|
Vertical layer direction appearance flexural modulus of elasticity |
Gpa |
Min |
6 |
8 |
10 |
13 |
|
Vertical layer direction |
% |
Max |
4 |
3 |
5 |
3 |
|
Compressive C Crev |
Min |
70 |
70 |
70 |
70 |
|
|
Impact strength |
KJ/m2 |
Min |
10 |
13 |
25 |
35 |
|
Cutting strength of adhering layer’s binding property |
Mpa |
Min |
7 |
8 |
7 |
9 |
|
Vertical layer direction electric strength |
KV/mm |
Min |
10 |
11 |
10 |
10 |
|
Parallel layer direction puncture voltage |
KV |
Min |
50 |
50 |
50 |
50 |
|
Shrinkage direction after dried |
|
|
|
|
|
|
|
Direction A |
% |
|
0.3 |
0.3 |
|
|
|
Direction B |
% |
Max |
0.3 |
0.3 |
|
|
|
Thickness |
% |
|
3 |
3 |
3 |
3 |
|
Oil absorption |
% |
Min |
10 |
8 |
10 |
5 |
|
Contamination for liquid dielectric |
_ |
Max |
0.1 |
0.1 |
0.1 |
0.1 |
|
Note: B stands for birch in the electrical insulating laminated compressed-wood veneer model.Birch electrical insulating laminated compressed-wood veneer technique target is same to the beech. |
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