Product Description
1.Main Raw Materials: Epoxy resin. Birch Sheet.
2.Compressed and Laminated Wood Used For Electrical Insulationrief Introduction:
It is widely used for insulation parts of the oil immersion transformer and instrument transformer, such as upper/lower clips.supporting beams.spacers. etc.
3.Nominal  thickness : 10–1500mm     1500X3000mm
Spinning cutting from excellent birch veneer into veneer sheets, drying and laminating and hot pressing. Has the advantages of moderate density, high mechanical strength, easy vacuum drying, easy machining, the dielectric constant close to the transformer oil, insulation cooperating reasonable,can be used in transformer oil for long. It can be used for the production of coil plate, core pad, lead bracket and other insulation/support components in transformers or mutual inductor.

Techinical  parameters

Standard: GB/T 20634.3-2008 /IEC61061-2:1998

No.

Project

Unit

Index

 

 

 

DLW101

DLW201

DLW202

DLW301

1

Appearance

Smooth surface, uniform color, no bubbles, no wrinkles, edge cutting neat, no stratification.

2

Density

g/m³

1.2-1.3

1.1-1.2

1.1-1.2

1.0-1.1

3

Vertical layer bending strength

A direction

MPa

≥80

≥65

≥65

≥55

 

 

B direction

 

≥80

≥65

≥65

≥55

4

Impact strength

A direction

KJ/m2

≥15

≥13

≥13

≥10

 

 

B direction

 

≥15

≥13

≥13

≥10

5

 Interlaminar shear strength

MPa

≥9

≥8

≥8

≥7

6

Vertical layer electrica l strength (in 90℃ transformer oil)

Kv/mm

≥9

≥8

≥7

≥7

7

Parallel layer break down voltage(in 90℃ transformer oil)

kv

≥50

≥50

≥50

≥50

8

Pollution for liquid dielectric electricity

≤0.1