This product 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. No.ItemUnitValue Dlw101Dlw201Dlw202Dlw301 1Appearance-Smooth surface, neat edge cutting, no layered cross-section 2DensityG/cmâ³1.2-1.31.1-1.21.1-1.21.0-1.1 3Vertical bending strengthA directionMpa805555 B direction 805555 4Impact strengthA directionKj/m215131310 B direction 15131310 5Interlayer shear strength Mpa9887 6Vertical electrical strengthKv/mm9877 (90â?? transformer oil) 7Parallel breakdown voltage (90â?? transformer oil)Kv50505050 8Pollution to liquid dielectric-0.1 9Shrinkage after dryingA direction0.30.30.30.3 B direction0.30.30.30.3 Thickness direction3333 10Water content6666 11Oil absorption58810 Application scope of laminated wood insulating parts used for transformerTransformer rating110kv110kv66-35kv 35kv
