The insulation performance of electric wood panels is affected by temperature, but the impact is relatively small within a certain temperature range.
1. Under low temperature conditions
-When the temperature decreases, the molecular motion inside the electric wood board slows down, and its insulation resistance will increase, which is beneficial for maintaining insulation performance to a certain extent. However, if the temperature is too low, it may cause the electric wood panel to become brittle, resulting in a decrease in its mechanical properties. When subjected to external forces, it is prone to cracks and other damages, indirectly affecting the insulation performance.
2. In a medium temperature environment (generally lower than its heat resistance level)
-In the normal working temperature range (such as from room temperature to around 120 ℃ of its heat resistance level E), the insulation performance of the electric wood board is relatively stable. This is because the chemical structure of phenolic resin itself does not undergo significant changes within this temperature range, which can effectively prevent the passage of current, maintain a high electrical resistivity, and its insulation related parameters such as dielectric constant and dielectric loss can also be maintained at a good level, thereby ensuring good insulation performance.
3. Under high temperature conditions
-When the temperature exceeds its normal operating temperature range, especially when it approaches or exceeds its heat resistance limit, the insulation performance of the electric wood panel will be greatly affected. Because high temperature can gradually soften phenolic resin, the molecular chains inside it begin to move more vigorously, which may result in some small pores or structural changes, leading to a decrease in insulation resistance. At the same time, high temperature may also cause chemical decomposition of the electric wood board, releasing some small molecular substances, further damaging its insulation structure, increasing the dielectric constant and dielectric loss, and in severe cases, leading to insulation performance failure.
