| Customization: | Available |
|---|---|
| Application: | Insulators |
| Color: | Wood Color |
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1.Brief induction
1)Low dielectric loss electrical insulating laminated compressed wood is widely used as insulating and
supporting material in power transformers and instrument transformers .It has many virtues such as moderate density ,
high mechanical strength ,easy to dry in vacuum dryer ,no bad inter-reaction with transformer oil ,easy to mechanical
processing etc. The dielectric constant of this materials close to transformer oil ,that make a reasonable insulation
match .It can be used in transformer oil of 105 centigrade for long time .
2)People usually use this material to make upper / lower pressure pieces ,cable supporting beams,limb spacer block
in oil-immersed transformers.And clamps in instrument transformers.It substitute steel plate ,insulating paper sheet ,
epoxy paper sheet ,epoxy glass fiber woven laminated board in these field ,thus can down the fabricating expense
and weight of transformers .
3)Electrical insulating laminated compressed wood is made from birch and willow veneer that peeled from high
quality timbers ,Veneer was and copressed with high temperature after gelatinizing .
2.Standard dimension of our product (unit mm)
1) To meet customers needs we produce boards of three different area :
1500×3000 1220×2440 850×1850
2) Usual thickness: Roechiling can also produce board of special thickness on customer's requests .
10,15,20,25,30,35,40,45,50,60,70,80,100
3.Dimension tolerance (unit mm )
| Items | Length | Width | Thickness | ||||||||||||
| Standard | 3000 | 1500 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 60 | 70 | 80 | 100 |
| Tolerance | 0 to 5 | 0 to 3 | 0 to 2 | 0 to 2.5 | 0 to 3 | ||||||||||
| Standard | 2400 | 1200 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 60 | 70 | 80 | 100 |
| 850 | 1850 | ||||||||||||||
| Tolerance | 0 to 3 | 0 to 3 | 0 to 1.5 | 0 to 2 | 0 to 2.5 | ||||||||||
4.Warp of board (unit mm)
| Thickness | Maximum distance from straight ruler | ||||
| 10-35 | no more than 4 | ||||
| 40-60 | no more than 3 | ||||
| 70-100 | no more than 2.5 | ||||
5.Apprearance quality
| Item | Permitable range | ||||||
| Swelling | not allowed | ||||||
| Cracking | |||||||
| Dead knot | |||||||
| Foreign-body adhering | |||||||
| Insect hole | |||||||
| Rot | |||||||
| Contamination | |||||||
| Bruising | A few is permitted ,but should not have bad effecting in usage | ||||||
| Impression | |||||||
| Color-odds and splash | |||||||
| Patches per squire meter on surface | no more than 3 |
6.Packing
Packed in cases made from wood strips,wood frames and other strong enough materials covered with moistureproof material
Gross weight of each package not exceed 3000kgs.
7.Storage
Products should be stored in a clean dry room wih temperture not exceed 40 centigrade .and should be laid flatwise ona stepping-board which at least 50 mm from the ground ,never close to fire sources ,heat sources and protection against
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