Standard sizes: 1500 * 1000 mm 3000 * 1500 mm 2400 * 1200 mm 2000 * 1000 mm 2200 * 1200 mm Thickness: 8-100mm Other sizes are available upon request. For each size, a minimum order of 2,000 kg per delivery is required. Description: Densified woodboard is widely used as insulation and supporting...
Standard sizes:
1500 * 1000 mm
3000 * 1500 mm
2400 * 1200 mm
2000 * 1000 mm
2200 * 1200 mm
Thickness: 8-100mm
Other sizes are available upon request. For each size, a minimum order of 2,000 kg per delivery is required.
Description:
Densified woodboard is widely used as insulation and supporting material in oil-type transformers and instrument transformers. It can replace steel plate, insulating pressboard, epoxy paper sheets, epoxy paperboard woven glass fabric lamination in these fields.
Characteristic:
Good Electrical Insulation Properties.
High Mechanical strength at Low specific density.
Excellent dielectric properties.
Aptness to work at high temperature.
Very good oil absorption.
Manufacturing process：
After being cut to size, each individual piece of veneer is impregnated with phenolic resin in a vacuum autoclave. Following impregnation, the pieces of veneer are baked in an oven to achieve a “B-stage” (partially cured) condition. The next step is to arrange and to stack the veneers to the desired configuration and thickness. Lamination, densification and complete curing are accomplished simultaneously in specially designed hot press machine.
Machined products：
Top & Bottom pressure ring, Pressure Beams, core to coil packing, Lead & Cleat support, step block or core packing, Densified wood support, Fasteners & other items for Power & Distribution Transformers.
Item | Index | Unit | Index data | |
Physical | Density | T/m3 | 0.9-1.1 | |
Rate of water content | % | ≤ 7 | ||
Thickness shrinkage ratio after drying | % | ≤ 1.5 | ||
Oil absorption rate | % | > 10 | ||
Ultimate thickness expansion rate after oil impregnation | % | ≤ 0.5 | ||
Compatibility with transformer oil | Good | |||
| Tensile strength | Parallel direction | Mpa | ≥50 |
| Parallel direction | Mpa | ≥50 | |
Vertical direction | Mpa | ≥120 | ||
| Parallel direction | Mpa | ≥100 | |
Vertical direction | Mpa | ≥100 | ||
Electrical | Volume resistivity | MΩ/m | ≥ 10a | |
| 20ºC Transformer (Vertical) | Mv/m | ≥9 | |
90ºC Transformer (Vertical) | Mv/m | ≥7 | ||
20ºC Transformer (Parallel) | Kv/m | ≥45 | ||
90ºC Transformer | Kv/m | ≥35 | ||
| 20ºC Transformer oil | ≤0.2 | ||
90ºC Transformer oil | ≤0.13 | |||
| 20ºC Transformer oil | ≤3 | ||
90ºC Transformer oil | ≤3.6 | |||
FAQ:
Q1. What's the payment term ?
A. T/T and L/C is acceptable and TT will be more appreciated. 30% deposit, 70% balance against B/L copy. Or 100% irrevocable LC at sight.
Q2. How to buy your ideal products?
A. You can provide us with your drawings with specifications, we will produce as per your drawing. Or we can design as your requirements if you do not have a clear plan.
Q3. What is your Packing/Package ?
A. Standard export packing or Customized packing as your request.
Q4. Would you accept to use our logo ?
A. OEM/ODM can be acceptable.
Q5. What kind of certificate you have ?
A. Our company already achieve ISO9001 certificates and we have test reports.
Q6. What else can I do for you?
A. Our salesmen will reply your inquiry within 24 hours. We can give you any support on the technique& other aspects.
Appearance Quality
Item | Allowed Range |
Swelling | Not Allowed |
Cracking | |
Dead Knot | |
Foreign-body Adhering | |
Insect Hole | |
Rot | |
Contamination | |
Bruising | |
Impression |
|
Color-odds and Splash | |
Patches per sq.m. on surface | ≤3 |
Production & Package
Application：
It is widely used as insulation and supporting material in oil-cooled transformers.
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Jul 31, 2020
Jul 30, 2020
