Electrical laminated wood is widely used as insulating and supporting material in transformers and instrument transformers. Electrical laminated wood has many virtues such as moderate specific gravity, high mechanical properties, easy vacuum drying, easy mechanical processing etc. The dielectric constant of this material is close to transformer oil, so it makes a reasonable insulation match. And it can be used in transformer oil of 105°C for long time.
Electrical laminated woodSpecification
|
Capability |
Unit |
Model |
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|
Technique target |
Rings technique target |
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|
P3B |
C1B |
C2B |
C3B |
C4B |
T2B |
T3B |
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|
Appearance density |
g/cm3 |
1.1~1.2 |
0.7~0.9 |
0.9~1.1 |
1.1~1.2 |
1.2~1.3 |
0.9~1.1 |
1.2~1.3 |
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|
Moisture |
% |
≤6 | ≤6 | ≤6 | ≤6 | ≤6 | ≤6 | ≤6 | |||||
|
Vertical layer direction flexural strength |
Direction
A |
MPa |
≥150 |
≥45 |
≥55 |
≥65 |
≥80 |
Dia＞
1000mm |
≥
100 |
≥140 |
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|
Direction
B |
Dia≤
1000mm |
≥90 |
≥125 |
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|
Vertical layer direction modulus of elasticity |
Direction A |
GPa |
≥14 |
≥4.5 |
≥6 |
≥8 |
≥9 |
≥10 |
≥13 |
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| B 向 | |||||||||||||
|
Compressibility （Below 20MPa） |
C |
% |
≤3 | ≤5 | ≤4 | ≤3 | ≤2.5 | ≤5 | ≤4 | ||||
|
Crev |
≥70 | ≥70 | ≥70 | ≥70 | ≥70 | ≥70 | ≥70 | ||||||
|
Impact strength （side test） |
A 向 |
KJ/m2 |
≥35 |
≥6 |
≥10 |
≥13 |
≥15 |
≥25 |
≥35 |
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| B 向 | |||||||||||||
|
Shear strength |
MPa |
≥8 | ≥5 | ≥7 | ≥8 | ≥9 | ≥7 | ≥9 | |||||
|
Vertical layer direction
Electric trength In （90±2）℃ Oil |
KV/mm |
≥11 |
≥9 |
≥10 |
≥11 |
≥12 |
≥10 |
≥10 |
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|
Parallel layer direction
Electric trength In （90±2）℃ Oil |
KV |
≥50 |
≥50 |
≥50 |
≥50 |
≥50 |
≥50 |
≥50 |
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|
Shrinkage after dried |
Direction A |
% |
≤0．2
≤0．5
≤3 |
≤0.3
≤0.3
≤3 |
≤0.3
≤0.3
≤3 |
≤0.3
≤0.3
≤3 |
≤0.3
≤0.3
≤3 |
Girth |
≤0.5 |
≤0.5 |
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|
Direction A |
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|
≤3 |
≤3 |
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Thickness |
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|
Oil absorption |
% |
≥8 | ≥20 | ≥15 | ≥8 | ≥5 | ≥10 | ≥5 | |
|
Contamination to liquid dielectric （Δtanδ） |
— |
≤0.1 |
≤0.1 |
≤0.1 |
≤0.1 |
≤0.1 |
≤0.1 |
Electrical laminated wood Standard length
: 2000mm X 1000mm & 2400mm X 1200mm& 3000mmx1500mm ,&3000x2400mm&2000mmx2000mm
Thickness: 10.0mm – 120mm
- Laminated Compressed Wood Sheets for electrical purpose: Confirming to IEC & DIN standards in
Low, Medium & High density
- Components can be supplied as per customer drawing & specifications.
