Rigid Materials
Laminated Transformer Board
Laminated transformer board is a composite material consisting of multiple layers of transformer board bonded with a phenolic impregnated sheet by hot pressing process. It has higher mechanical strength and insulation strength than laminated wood. It offers enhanced mechanical strength and improved insulation performance.
- Sheet size: 960mm x 1960mm or 960mm x 2960mm
- Thickness: 4.00mm - 150mm
| No. | Property | Unit | Value | |
|---|---|---|---|---|
| 1 | Apparent density | g/cm3 | 1.2 - 1.3 | |
| 2 | Moisture content | % | ≤4.0 | |
| 3 | Shrinkage | Thickness | % | ≤4.0 |
| Otherwise | ≤1.0 | |||
| 4 | Ash content | % | ≤0.8 | |
| 5 | Oil absorption | % | ≥9.0 | |
| 6 | Flexural strength | Vertical sheet D | N/cm2 | ≥100.0 |
| Level Sheet D | ≥85.0 | |||
| 7 | Elastic strength | Vertical sheet D | ≥120.0 | |
| Level Sheet D | ≥50.0 | |||
| 8 | Conductivity of aqueous extract | Ms/m | ≤8.0 | |
| 9 | Electrical break down strength 50Hz | KV/mm | >6.0 | |