Insulating Pressboard

Insulating Pressboard

This product can be widely used in ultra-high voltage power transformers, transformers, reactors and other large power transmission and transformation equipment.

Product description:

Insulating pressboard / cardboard / Insulation pre-compressed board is made of 100% high-purity insulating wood pulp, refined by advanced technology and equipment. It has the characteristics of high mechanical strength, electrical strength, tensile strength, high elongation, low compressibility and proper bending resistance.

Insulation pre-compressed board


Applications:

This product can be widely used in ultra-high voltage power transformers, transformers, reactors and other large power transmission and transformation equipment.


Product Standards:  

After years of continuous improvement and technological transformation, the production process, process equipment and automation control system have been upgraded in accuracy, and the overall technical level has been greatly improved. The products have been approved by the China Machinery Industry Electrical Material Quality Supervision and Inspection Center and domestic and foreign customers. During these inspections, the main technical parameters of insulating paperboard reached Q/GBGX004-2013, which is better than the B.3.1A standard in IEC60641-3-1: 2008, reaching the international advanced level of similar products.



Property

Unit

Standard

Test result

Test method

Thickness tolerance

%

±7.5

1.2

IEC60641-2:2004

Tightness

g/cm3

0.95-1.15

1

Tensile 
strength

vertical

N/mm2

≥55

56.5

horizontal

N/mm2

≥35

36.2

Elongation

vertical

%

≥3.0

4.1

horizontal

%

≥4.0

5.2

Shrinkage

vertical

%

≤0.7

0.52

horizontal

%

≤1.0

0.93

thickness 
direction

%

≤5.0

4.2

Ash content

%

≤1.0

0.91

Oil absorption

%

≥15.0

19.3

PH of water extraction


6-9

7.51

Conductivity of 
water extraction

mS/m

≤8.0

7.7

Dielectric 
Strength

in air

kV/mm

≥10

10.1

in oil

kV/mm

≥35

35.2

Moisture content

%

≤8.0

7.7



Storage:

In order to maintain its excellent insulation properties, insulating pressboard should be stored in a well-preserved package in a warehouse protected from rain, moisture, and fire. 


Packing:

Pallet and Plastic woven bag


Insulation pre-compressed board3



【About delivery】

We will deliver the goods to you upon confirmation of the cooperation method and cooperation. We have special personnel to strictly check the quality of the goods before delivery and packaging.


【About cooperation】

We are based on the service tenet of excellence in production, honest and trustworthy distribution, and warm and thoughtful service, and the entrepreneurial spirit of assisting partners to achieve their careers and thus their own careers, and provide customers with quality and service.





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