Laminated Wood Used for Transformers with Excellent Properties

Electrical laminated wood veneer is widely used as insulating and supporting material in
transfromers and instrument transformers. It has many virtues such as moderate specific
gravity, high mechanical properties, easy vacuum drying, 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 transformer oil of 105C for 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 cutted down the material expenses and weight of transformers.

The raw materials of electrical laminated wood veneers 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.
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