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High Density Transformer Pressboard----[[LIREN ELECTRICAL INSULATION MATERIALS]]
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 High Density Transformer Pressboard 

 

Description:

High Density Transformer Pressboard is a high grade precompressed pressboard made with 100% unbleached sulphate wood pulp. This product has been through in-line metal detection during production process. It is according to IEC60641-3-1 Type B3.1A.

This product has high purity and density, low shrinkage and compressibility, excellent mechanical strength and electrical strength, and optimal oil-impregnability.

 

Application:         

High Density Transformer Pressboard is widely used in 500KV oil-filled power transformers and distribution transformers, reactors, electric motor, and other electrical machines and appliances. 

Technical Data:                  

Properties

Units

LR-PB31A Transformer Pressboard Typical Value

Nominal Thickness

mm

0.80

1.0

1.6

2.0

2.5

3.0

4.0

5.0

6.0

8.0

 

Thickness Tolerance

%

7.5

7.5

7.5

5.0

5.0

5.0

4.0

4.0

4.0

4.0

 

Density

g/m3

1-1.25

1-1.25

1-1.25

1-1.25

1-1.25

1-1.25

1.1-1.30

1.1-1.30

1.1-1.30

1.1-1.30

 

Tensile

Strength

MD

MPa

105

105

105

110

110

110

115

115

115

115

 

TD

MPa

80

80

80

85

85

85

90

90

90

90

 

Elongation

MD

%

3

3

3

3

3

3

3

3

3

3

 

TD

%

4

4

4

4

4

4

4

4

4

4

 

Shrinkage

MD

%

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

0.4

 

TD

%

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

 

Thick

%

4.5

4.5

4.5

4.5

4.5

4.5

4.5

4.5

4.5

4.5

 

Dielectric

Strength

In Air

KV/mm

12

12

12

12

12

12

12

12

12

12

 

In Oil

KV/mm

45

45

45

40

40

40

35

35

35

35

 

Compressibility C

%

10

10

10

7.5

7.5

7.5

5.0

5.0

5.0

4.0

 

Oil absorption

%

11

11

11

9

9

9

7

7

7

7

 

Moisture content

%

6

6

6

6

6

6

6

6

6

6

 

Ash Content

%

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

 

pH of aqueous extract

 

6.0-9.0

6.0-9.0

6.0-9.0

6.0-9.0

6.0-9.0

6.0-9.0

6.0-9.0

6.0-9.0

6.0-9.0

6.0-9.0

 

Conductivity of

aqueous extract

mS/m

4.5

4.5

4.5

5.5

5.5

5.5

7.5

7.5

7.5

8.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Standard Size: 1065x1050mm, 1065x2100mm,1600x1050mm, 1600x2100mm, Max 3200x6300mm;

               special size on request.

 

Notes: The technical information and data, recommendations, and other statements provided are based on tests or experience

which we believes to be reliable, but the accuracy or completeness of such information is not guaranteed. Before using this product, you must evaluate it and determine if it is suitable for your intended application.

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