High Density Strata Wood for Oil Transformer

Short Description:

Electrical laminated wood is widely used as insulation and support material in transformers and transformers. It has the advantages of moderate specific gravity, high mechanical strength, easy vacuum drying, and easy machining. Its dielectric constant is close to that of transformer oil, and its insulation coordination is reasonable. It can be used in transformer oil at 105°C for a long time. Electrical laminated wood has been widely used in oil-immersed transformers to manufacture upper and lower pressure plates, lead brackets, iron yoke pads and other parts, and is used to make clips in transformers.

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Product Detail

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Product Description

It replaces steel plates, insulating cardboard, epoxy cardboard, etc. The application of epoxy glass cloth board in these aspects reduces the self-weight and material cost of the transformer. Electrical laminated board is a veneer made of high-quality birch wood, which is cooked, peeled and dried. After being coated with special insulating glue, it is made by high temperature and high pressure.

Product Specification

Maximum size of plate (length × width × thickness): 4000×3000×120(mm)
Common specifications and dimensions of plates (length × width × thickness): 3000×1500×(10—120) (mm), 2400×2000×(10—120) (mm)

Product Features

Name	Electrical insulating laminated wood
Test item					Unit	Test method
Apparent Density					g/m3	IEC 61061-2:2001
Moisture content					%
oil adsorption					%
Thickness variation before and after oil absorption					%
Compressive strength			normal	Vertical to the layers	Mpa	Refer to ISO604: 1993
				parallel to the layers
			90℃	Vertical to the layers
				parallel to the layers
Flexural strength			normalcy	MD	Mpa	IEC 61061-2:2001
				CD
			90℃	MD	Mpa
				CD
Flexural modulus			normalcy	MD	Mpa
				CD
			90℃	MD
				CD
Compressibility perpendicular to the laminations			C		%
			C rev
Impact strength parallel to the laminations			Vertical to the layers		kj/m²
			parallel to the layers
Contamination of liquid dielectric
Electric strength perpendicular to the laminations					MV/m
Breakdown voltage parallel to the laminations					KV
Shrinkage after drying		A direction			%
		B direction
		thickness