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Good quality Transformer Oil Dehydration - High densified electrical Laminated Wood for oil transformer insulation – Trihope Detail:

  1. Veneer Face Flatness(unit mm)

Normal Thickness

Distance of any point on the upper surface of the veneer that deviates from the light weight straight ruler

Veneer length 500

Veneer length 1000

≤15

2.0

4.0

>15..≤25

1.5

3.0

>25..≤60

1.0

2.0

>60

1.0

1.5

Appearance Quality

Item

Allowed Range

Swelling

Not Allowed

Cracking

Dead Knot

Foreign-body Adhering

Insect Hole

Rot

Contamination

Bruising

A few allowed, not effect in usage

Impression

Color-odds and splash

Patches per sq.m on surface

≤3

 

GB Test Item— Before delivery Factory inspection

Test Item

 Unit

Standard

Test Method

Vertical Bending Strength

Toward A

Mpa

≥65

GB/T2634—2008 Test Standard

Toward B

≥65

Vertical Bending modulus of elasticity

Toward A

Gpa

≥8

Toward B

≥8

Compressibility (under 20MPa)

Toward C

%

≤3

Crev

≥70

Impact strength (side test)

Toward A

KJ/㎡

≥13

Toward B

≥13

Interlaminar shear strength

Mpa

≥8

Vertical electric strength (90 ℃ + 2 ℃)

KV/mm

≥11

Vertical electric strength (90 ℃ + 2 ℃)

KV

≥50

Performance density

g/cm³

>1.1~1.2

water content

%

≤6

Shrinkage after drying

Toward A

%

≤0.3

Toward B

≤0.3

Toward thickness

≤3

Oil absorption

%

≥8

 

 


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Good quality Transformer Oil Dehydration -
 High densified electrical Laminated Wood for oil transformer insulation – Trihope detail pictures


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