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High densified electrical Laminated Wood for oil transformer insulation

Electrical laminated wood is widely used as insulation and supporting materials in transformers and instrument transformers. It has many virtues such as moderate specific gravity, high mechanical properties, easy vacuum drying, no bad inner-reaction with transformer oil, easy mechanical processing, etc. The dielectric constant of this material is close to transformer oil, so it makes a reasonable insulation match. And it can be used in the transformer oil of 105℃ for a long time.
People usually use this material to make upper/lower pressure pieces, cable supporting beams, limbs, spacer blocks in oil-immersed transformers, and clamps in instrument transformers. It replaced steel plates, insulating paper sheets, epoxy paper sheets, epoxide woven glass fabric lamination in these fields, and cut down the material expenses and weight of transformers.


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Description

Products details:

Insulation board is manufactured in accordance to IEC standards, in a single sheet and in a thickness of up to 8 mm. The thickness range can be extended up to 150 mm by Transformer laminations.

The raw materials of laminated wood sheets are high-quality birch and willow timbers. After boiling, rotary cutting, drying, these timbers are made to veneers. At last, the veneers will be glued with special insulating gluewater and processed under high temperature and pressure.

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


FAQ

Payment & Delivery

Payment term : L/C,T/T,Western Union

Delivery time : 90 working days after advance

Guarantee: The guarantee period shall be 12 months counting from the date of signing the Acceptance Report of this machine at the end-user’s site，but no longer than 14 months from the date of delivery.

What is YIBO?

8A Class Transformer Home with a full solution for the Transformer Industry

1, A real manufacturer with complete in-house facilities and passed ISO9001:2020 quality control system.

2, A professional R&D Center, having collaboration with well-know Shandong University.

3. A top performance company Certificated with International Standards like ISO, CE, SGS and BV etc.

4, A better cost-efficient supplier , all key components are international brands like Simens, Schneider and Mitsubishi etc.

5, A reliable business partner, served for  CASC,CRRC,CASDY,ABB,DELIXI, EATON, RITZ,TENGEN, Russia Military Enterprise etc in past 23 years.

6. A factory has passed the global TOP 500 enterprise clients inspection.

7. A market share in China is over 85% and Top 3 in electrical equipment field.

8. A have mainly manufacture the whole of electrical equipment and technical output service for decades.


Q1: How to grantee the quality ?

The quality is approved by national certificate ,several senior inspection personnel ,the brand material supplier ensure the safety and reliability of everything from storage to finished the goods .

Q2:Do you provide overseas installation and training ?

A: It’s optional .Our company will provide the guidance and videos for installation and commissioning.

If you need ,we can send engineers for for overseas installation and training.

Q3:How long is the warranty ?

A:The warranty period is 12 months .During Any problems ,our company will respond within 24 hours .







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