Electrical Laminated Board Used in Oil-immersed Transformers

Descriptions of Electrical Laminated Board: This electrical laminated board insulation materials is made of good birch that is rotarily cut into thin wood layer and then dried, laminated and hot pressed. It has moderate density and high mechanical ……

Descriptions of Electrical Laminated Board:

This electrical laminated board insulation materials is made of good birch that is rotarily cut into thin wood layer and then dried, laminated and hot pressed. It has moderate density and high mechanical strength and it is easy to be dried in vacuum and to be processed. With the dielectric constant close to that of transformer oil, it can be used in transformer oil for a long time. It can be processed to insulating and supportive components such as coil plate, core pad and lead support of transformer or mutual inductor.

Applications of Electrical laminated board:

Electrical laminated boards are widely used as insulating and supporting materials in transformers. It has the advantages of moderate specific gravity, high mechanical strength, easy vacuum drying and mechanical processing. Its dielectric constant is close to that of transformer oil, and its insulation is reasonable. It can be used in transformer oil at 105 C for a long time. Electrical laminated board has been widely used in oil-immersed transformers to manufacture upper and lower pressure boards, lead brackets, yoke pads and other parts. It is used to make clamps in transformers. It replaces the application of steel plates, insulating cardboard, epoxy cardboard and epoxy glass cloth boards in these areas, thus reducing the weight and material costs of transformers.

Technological process of Electrical laminated board:

Electrical laminated boards are boiled, peeled and dried veneers made of high quality birch wood, coated with special insulating glue, and then made by high temperature and high pressure.

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