Electrical Laminated Wood for Transformer

Product Description

Electrical laminated wood
Introduction:
Electrical laminated wood is widely used as insulating and supporting material in transformers and instrument transformers. It 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.


Specification  

Capability

Unit

Model

Technique target

Rings technique target

P3B

C1B

C2B

C3B

C4B

T2B

T3B

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

Moisture

%

≤6

≤6

≤6

≤6

≤6

≤6

≤6

Vertical layer direction flexural strength

Direction A

MPa

≥150

≥45

≥55

≥65

≥80

Diameter>1000mm

≥100

≥140

Direction  B

Diameter≤1000mm

≥90

≥125

Vertical layer direction modulus of elasticity

Direction A

GPa

≥14

≥4.5

≥6

≥8

≥9

≥10

≥13

B

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

KJ/m2

≥35

≥6

≥10

≥13

≥15

≥25

≥35

B

Shear strength

MPa

≥8

≥5

≥7

≥8

≥9

≥7

≥9

Vertical layer direction Electric trength In (90±2)ºC Oil

KV/mm

≥11

≥9

≥10

≥11

≥12

≥10

≥10

Parallel layer direction Electric trength In (90±2)ºC Oil

KV

≥50

≥50

≥50

≥50

≥50

≥50

≥50

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

Direction A

≤3

≤3

Thickness

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

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.