Lignostone Transformerwood eOver the decades Lignostone® Transformerwood® has proved an indispensable construction and insulating material, particularly for power and distribution transformers and ideal for many other applications. Lignostone® Transformerwood® is a laminated densified wood according to IEC 61061. It consists of red beech veneers, which are joined together with thermosetting synthetic resins under high pressure and heat.
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Sheet, Rod, Pressure Beams
Certifications
FM 4910 Listed, UL 94 V-0, RoHS and REACH Compliant, ASTM E-84
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| Type | Size | Length | Color |
|---|---|---|---|
| Sheet | 10-300 mm | 1300 x 2000 mm or 1500 x 1500 mm | Natural |
| Rod | 6-28 mm dia. | 2,000 mm | Natural |
| Pressure Beams | up to 300 mm | up to 5500 mm | Natural |
Give us your cut-to-size dimensions. We will precision-cut these plastics to your exact size. Additional sizes and colors available upon request.
| Physical Properties | Units | ASTM | Results |
|---|---|---|---|
| Specific Gravity | g/cm^3 | DIN 53479 | 1.1 |
| Oil Absorption | % | IEC 61061 | -15 |
| Mechanical Properties | Units | ASTM | Results |
|---|---|---|---|
| Modulus of elasticity in flexure | N/mm^2 | ISO 178 | 10,000 |
| Compressive strength (perpendicular) | N/mm^2 | ISO 604 | 210 |
| Compressive strength (parallel | N/mm^2 | ISO 604 | 80 |
| Flexural strength (parallel and perpendicular) | N/mm^2 | ISO 178 | 130 |
| Tensile strength | N/mm^2 | ISO 527 | 90 |
| Thermal Properties | Units | ASTM | Results |
|---|---|---|---|
| Thermal conductivity at 20°C | W/mK | DIN 52612 | ca. 0.22 |
| Operating temperatures continuous | °C | 105 | |
| Temperature limit when drying and oil impregnating | °C | 130 |
| Electrical Properties | Units | ASTM | Results |
|---|---|---|---|
| Electrical strength at 20°C | kV/25mm | IEC 60243 | 60 |
| Electrical strength at 90°C | kV/25mm | IEC 60243 | 50 |
| Dielectric loss factor at 50 Hz 20°C | tan alpha | DIN 53483 | 0.02 |