Electrical Laminated Wood For Transformer

Time: 05-19 2025 Auther: Ztelec group

Electrical Laminated Wood Introduction Laminated wood is created by cutting rotationally fine birch into veneers, an...

Electrical Laminated Wood Introduction

Laminated wood is created by cutting rotationally fine birch into veneers, and then gumming, stacking and hot pressing after dried. It has the advantages of moderate density, high mechanical strength, convenient for vacuum drying, good compatibility with transformer oil, and easy for machining. Also, its dielectric constant is close to that of transformer oil and their insulation coordination is reasonable, so it can be used in transformer oil for a long time.

transformer-laminated-wood

Application of Electrical Laminated Wood

Electrical laminated wood is widely used in transformer oil insulation and support components, such as pressure plate, core bottom plate, trapezoidal back plate, lead installation, clamp and other parts

Advantage of Electrical Laminated Wood

Electrical laminated wood for oil-immersed transformer, produced by ZTaero using birch veneer in the Far East of Russia as raw material which has high density of wood and less knots of panel, possesses the advantages of high product density and excellent dielectric property, and can be used in transformer oil to effectively reduce the dead weight and material cost of transformer. The mechanical and electrical properties of products are superior to the similar one of other companies. Its quality is recognized by domestic and foreign large enterprises such as Lens Technology in China and Schneider Electric and sold overseas such as European and American areas.

transformer-laminated-wood-plywood

Application of Electrician Laminated Wood in Transformers

Electrical laminated wood is widely used in various applications, particularly in the construction of transformers. Here are some of its key applications:

Transformer Insulation: Laminated wood is a cost-effective insulating material with good drying characteristics and easy processing. It’s used in the construction of transformers.

Construction Elements in Transformers: This wood consists of beech veneers, which are joined together with thermosetting synthetic resins under pressure and heat.

Insulating and Support Components in Transformer Oil: It can be used as insulating and support components in transformer oil, such as coil platen, iron core base plate, trapezoid backing plate, lead mount, clamp, and other parts.

Cleat System, Winding Clamping Rings, and Platforms: These are mainly used for thick and thin beams of the cleat system, winding clamping rings and platforms, threaded rods and nuts, and for thick boards of various functions.

These applications take advantage of the electrical laminated wood’s properties such as good electrical insulation, high mechanical loading capacity, resistance to abrasion and wear, and temperature resistance.

Electrical Laminated Wood Technical Parameters

Executive Standard: GB/T 20634.3-2008 /IEC61061-3-1:1998
Number	Item		Unit	Value
Number	Item		Unit	DLW101	DLW201	DLW202	DLW301
1	Appearance		–	Smooth Surface, Neat Cutting Edge, No Delamination of Section
2	Density		g/cm³	1.2-1.3	1.1-1.2	1.1-1.2	1.0-1.1
3	Flexural Strength at Perpendicular Lamination	A-Direction	MPa	≥80	≥65	≥65	≥55
3	Flexural Strength at Perpendicular Lamination	B-Direction	MPa	≥80	≥65	≥65	≥55
4	Impact Strength	A-Direction	KJ/m2	≥15	≥13	≥13	≥10
4	Impact Strength	B-Direction	KJ/m2	≥15	≥13	≥13	≥10
5	Interlaminar Shear Strength		MPa	≥9	≥8	≥8	≥7
6	Electrical Strength at Perpendicular Lamination （Transformer Oil at 90℃）		Kv/mm	≥9	≥8	≥7	≥7
7	Breakdown Voltage at Parallel Lamination （Transformer Oil at 90℃）		kv	≥50	≥50	≥50	≥50
8	Pollution of Liquid Dielectric		–	≤0.1
9	Shrinkage after Drying	A-Direction	％	≤0.3	≤0.3	≤0.3	≤0.3
		B-Direction		≤0.3	≤0.3	≤0.3	≤0.3
		Thickness-		≤3	≤3	≤3	≤3
		Direction		≤3	≤3	≤3	≤3
10	Water Content		％	≤6	≤6	≤6	≤6
11	Oil Absorption Rate		％	≥5	≥8	≥8	≥10
Suggestions on the Application of Laminated Wood Insulation in Transformer			Voltage Rating	≥110KV	≤110KV	66-35KV	≤35KV

Package & Storage：

Package & Storage: Wrapped with packaging film and packed in pallet; horizontally placed in dry and clean room at room temperature; keep it away from moisture and fire. The storage period is 12 months.

Warehose &Package

Service

Pre-sales Service：

We offer personalized 1-on-1 assistance for our products. If you have any questions, our experts will provide you with technical guidance and free samples.

After-sales Service：

Our team will regularly communicate with you, ensuring that you can promptly consult us for any insulation-related issues.

Product Services：

We provide customized product sizing and processing services.

Certificate ：

Here is the certificate of our insulation materials and factory, which can ensure the quality of the products which supply to our customers. In 2011, we obtained the certificates of ISO9001:2008 International Quality Management System, and ISO14001 organization environmental management system. Products including Power Distribution Cabinet, HV Switchgear, Transformer Substation, Complete Switchgear and power transformers (below 35kV) passed the tests from CNAS, IAC-MRA, AL, CMA and others international testing organizations.

cert

FAQ ：

1. Is ZTaero group a manufacturer of Electrical Laminated Wood For Transformer?

A: ZTaero is a Chinese manufacturer of insulating materials and was founded in 1958.

2. Do you support custom?

A: We can customize the products according to customer needs and support the processing parts.

3. Is the sample free?

A: Our samples are free, but require the customer to bear the shipping costs.

4. Is there a spot?

A: Our warehouse maintains stocks throughout the year and some sizes can be shipped within a week.

Leave us a message to get quotation and sample!

If you are interested in our products,, please send us a message and we will contact you as soon as we receive it. Email: info@ztaero.com whatsApp: +8616650273778