OMEN INDUSTRIAL CO.,LTDNingbo Leadwin international trade co.,ltd Sunne Feng (General Manager) http://www.omenco.cn
Email: sales@omenco.cn, sunne_seals@vip.163.com
msn: sunnefeng@hotmail.com skype: omenco001
Phone: +86-574-88183823,88183859 83030723,83036723
Fax: +86-574-56664782, 83030721
Mobile : +86-18957806501
Address : 1-2F,Building 2 ,58 Fengqi Road, Yinzhou,Ningbo,China
Insulation laminated sheet

Electrical laminated wood

                    
1.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℃ for long time.
2.People usually use this material to make 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 cut down the material expenses and weight of transformers.
3.The raw materials of electrical laminated wood are high quality birch and willow timbers. After boiling, rotary cutting, drying, these timbers are made to veneers. At last the veneers will be glued with special insulating gluewater and processed under high temperature and pressure.
Veneer Max Specification: (length × width ×thickness) 4000×3000×120mm
1Boards Flatnessmm

 

Distance of points on the veneer face from light weight straight ruler

Normal Thickness

500 straight ruler

1000 straight ruler

≤15

2

4

15…≤25

1.5

3

25…≤60

1

2

60

1

1


2Surface Quality

Item

Allowed Range

Swelling

Not Allowed

Cracking

Dead knot

Foreign-body adhering

Insect hole

Rot 

Contamination  

Bruising  

A few allowednot effect in usage

Impression    

Color-odds and splash   

Patches per sq.m. on surface

≤3

3Electrical Laminated Wood Technique Target Table

Capability

Unit

Model

Technique target

Rings technique target

B1

B2

B3

B4

B5

B6

B7

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

Diameter1000mm

≥100

≥140

Direction B

Diameter≤1000mm

≥90

≥125

Vertical layer directionmodulus of elasticity

Direction A

GPa

≥14

≥4.5

≥6

≥8

≥9

≥10

≥13

Direction B

 

Compressibility

 

%

≤3

≤5

≤4

≤3

≤2.5

≤5

≤4

Below 20MPa

 

≥70

≥70

≥70

≥70

≥70

≥70

≥70

Impact strength

Direction A

KJ/m2

≥35

≥6

≥10

≥13

≥15

≥25

≥35

side test

Direction B

 

Shear strength

MPa

≥8

≥5

≥7

≥8

≥9

≥7

≥9

Vertical layer direction

KV/mm

≥11

≥9

≥10

≥11

≥12

≥10

≥10

Electric trength

In 90±2℃ Oil

Parallel layer direction

KV

≥50

≥50

≥50

≥50

≥50

≥50

≥50

Electric trength

In 90±2℃ Oil

Shrinkage after dried

Direction A

%

≤0.2

≤0.3

≤0.3

≤0.3

≤0.3

Girth

≤0.5

≤0.5

Direction A

≤0.5

≤0.3

≤0.3

≤0.3

≤0.3

Thickness

≤3

≤3

≤3

≤3

≤3

 

 

 

Oil absorption

%

≥8

≥20

≥15

≥8

≥5

≥10

≥5

Contamination to liquid dielectric

≤0.1

≤0.1

≤0.1

≤0.1

≤0.1

≤0.1

≤0.1

Δtanδ

4:Nominal thickness and allow the permissible variations (unit mm)

Nominal thickness

Allow deviation

≤10

±1.4

10-≤15

±1.6

15-≤20

±1.8

20-≤25

±2.0

25-≤30

±2.2

30-≤40

±2.6

40-≤60

±3.0

60-≤100

±4.0

100-≤150

±4.0

5Plank nominal length and width and allow deviation (unit mm)

Length and width

Allow deviation

100-≤250

±0.8

250-≤500

±1.0

500-≤1000

±2.0

1000-≤2000

±3.0

2000

±4.0

5Packing:Packaged in wooden crates,wooden framed cases or other strong enough materials covered with moisture-proof material outside.Gross weight of each packaged not exceeds 3000kgs.

6Storage:Products should be stored in a clean and dry room with temperature not exceeding 40℃ and should be laid flat wise on a stepping-board which is at least 50mm from the ground, not close to fire,heat source and protected against moisture.


Url:
OMEN INDUSTRIAL CO.,LTD Ningbo Leadwin international trade co.,ltd Sunne Feng (General Manager) http://www.omenco.cn Email: sales@omenco.cn, sunne_seals@vip.163.com
msn: sunnefeng@hotmail.com skype: omenco001
Phone : +86-574-88183823,88183859 83030723,83036723 Fax : +86-574-56664782, 83030721     Mobile : +86-18957806501
Address :1-2F,Building 2 ,58 Fengqi Road, Yinzhou,Ningbo,China
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