Electrical laminated wood for oil-immersed transformer

product description

Description of Electrical Laminated Wood

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.

Application of Electrical Laminated Wood

Can be widely 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.

Advantage of Electrical Laminated Wood

Electrical laminated wood for oil-immersed transformer, produced by ZTelec Group 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.

Disadvantages of Electro Laminated Timber

While electrical laminated timber has many advantages, it also has some disadvantages. Here are a few:

Price: The cost of production is associated with the price, making the price of laminated timber higher than that of ordinary lumber.

Moisture Sensitivity: Laminated timber is sensitive to moisture. Prolonged exposure to moisture can cause swelling or warping. Proper moisture management and protection are important to maintain the structural integrity of the material.

Fire Resistance: While moderately resistant to fires, laminated timber can be susceptible to high flames and might require additional fire safety treatment.

Termite Resistance: Although laminated wood is less prone to termite or insect attacks due to its solid structure, it’s not completely immune.

These disadvantages need to be considered when choosing laminated timber for specific applications. Despite these drawbacks, laminated timber is still a popular choice due to its strength, flexibility, and aesthetic appeal

Electrical laminated wood Applications

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.

Property Parameter of Electrical Laminated Wood

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

How much electrician laminated wood

The price of electrical laminated wood can vary depending on the specifications and the quantity you need. Here are some references:

The price for Laminated Wood (C2B) Electrical Laminated Wood from Kang Liyuan Science & Technology (Tianjin) Co., Ltd. is between US $260.00-400.00 per kg for a minimum order of 1,000 kg.

Another product, Electrical Laminated Wood/Transformer RAM Material produced by the same company, is priced at US $1,300.00 per ton for a minimum order of 1 ton.

Please note that these prices are just references and the actual cost may vary. It’s recommended to contact the suppliers directly for the most accurate and up-to-date pricing information. Also, keep in mind that additional costs such as shipping and taxes may apply.