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Electrical Current location:Shanghai Technical By-Products Int'l Corp. Co., Ltd. > Electrical
Transformer Board and paper

 

STBPI can supply different types of Press Papers and Press Boards as per client request. Data sheet of our common grades can be viewed here. Depending on customer requirements we can offer the right product to meet your application. These products are widely used in Electrical Industries especially in production of Motors and Transformers.

  Transformer Paper, type 3055

  Technical Data Sheet

3055 Press Paper; Size: 0.2/0.5mm x 1135 mm x Roll

No.

Item

Unit

Eligibility criteria
Value

1

Thickness tolerance (Max)

%

±10

2

Density

g/cm3

1.00 - 1.20

3

Tensile strength

Vertical

N/mm2

≥80

Horizontal

≥40

4

Elongation

Vertical

%

≥1.5

Horizontal

≥7.0

5

Shrinkage

Vertical

%

≤1.0

Horizontal

≤1.5

Thickness

≤7.5

6

Moisture Content

%

≤8.0

7

Wave Conductivity of   Aqueous Extract

ms/m

≤8.0

8

PH Value of Aqueous Extract Wave

-

6.0-9.0

9

Oil Absorption

%

≥10.0

10

Ash Content

%

≤1.0

11

Electric Strength

KV/mm

≥55

Standard

The material meets the standard of IEC60641-3-2:2007-11; P4.1A

Transformer Board (1.5mm) , STBPI-PSP-A

No.

Testing Item

Unit

Requirements

Testing Result

Testing Method

1

Thickness (Maximum deviation of all measured value)

%

-7.5 ~ +7.5

+2.0

-0

According to the testing methods of GB/T 19264.3-2003

2

Surface Density (tightness)

g/cm³

1.00 ~ 1.20

1.13

3

Tensile Strength

Vertical

Mpa

≥100

154

Horizontal

≥75

99

4

Elongation

Vertical

%

≥3.0

3.5

Horizontal

≥4.0

4.0

5

Compression C

%

≤10.0

6.5

6

Restore Part of Compression Crev

%

≥45

61

7

Shrinkage

Vertical

%

≤0.5

0.2

Horizontal

≤0.7

0.3

Thickness

≤5.0

2.0

8

Adhesion between Layers

(Visual Test)

-

Stripping should be significant phenomenon of rough and hairy on one or more layers.

Stripping is significant phenomenon of rough and hairy on one or more layers.

9

Moisture Content

%

≤6.0

3.6

10

Ash Content

%

≤1.0

0.4

11

Wave Conductivity of Aqueous Extract

mS/m

≤5.0

1.5

12

pH Value of Aqueous Extract Wave

-

6.0~9.0

6.8

13

Oil Absorption

%

≥11.0

14.5

14

Electric Strength

Air

kV/mm

≥12

15

Oil

≥40

41

15

The Pollution of the Liquid Dielectric (Change Value of the Dielectric loss Factor)

-

-

+6.0×10-5

Remark: The dielectric loss factor of blank oil is 1.0×10-4 in Item 15.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


                                                                                                                          

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