Controlling Temperature and Vacuum for Effective Drying

For a high frequency isolation transformer, the drying process must follow a precise temperature and vacuum schedule. During the initial low-temperature stage, it is not advisable to apply a deep vacuum immediately. Doing so may hinder the heating of the transformer core and delay moisture removal. Once the temperature rises to around 70–80°C, the vacuum level can be gradually increased. This stage allows moisture to evaporate evenly without causing stress on the insulation. In high frequency step up transformers, controlling the rate of moisture release ensures stable performance and prevents partial discharge. Similarly, for high frequency flyback transformers, this controlled process guarantees the integrity of insulation layers and long-term operational safety.