Vacuum pressure impregnation (VPI) is a process used to manufacture dry-type transformers. This process is mainly used to improve the insulation performance and durability of transformers. Here are some key points of VPI process:
- Process principle * *: VPI process involves impregnating insulation material (usually epoxy resin) into the windings and iron core of a transformer in a vacuum environment. The vacuum state can remove bubbles from the impregnated material, ensuring that the insulation material can fully penetrate every detail of the winding.
- Insulation Performance * *: Through VPI treatment, the insulation performance of dry-type transformers is significantly improved, which can withstand higher voltages and temperatures and extend their service life.
- Moisture resistance: VPI technology can effectively prevent moisture from entering, improve the performance of transformers in humid environments, and reduce failure rates.
- Environmental friendliness: Compared with traditional oil immersed transformers, dry-type transformers do not leak oil during use, making them more environmentally friendly.
- Application Fields * *: VPI dry-type transformers are widely used in industrial, commercial buildings, power plants, substations, and other places, especially in areas with high environmental requirements.
- Easy to maintain * *: Due to its structural characteristics, VPI dry-type transformers usually require less maintenance, reducing operating costs.
In summary, the vacuum pressure impregnation process provides higher performance and reliability for dry-type transformers and is an important transformer manufacturing technology in modern power systems.