what is a vpi dry type transformer

what is a vpi dry type transformer

A VPI dry-type transformer is a type of electrical transformer that uses air for cooling and insulation instead of oil or liquid. "VPI" stands for Vacuum Pressure Impregnated. This means the transformer's windings are submerged in a special resin, and then subjected to a vacuum and pressure treatment. This process forces the resin into every nook and cranny of the windings, creating a strong, uniform insulation layer that enhances the transformer's performance and durability.

 

 

Structural characteristics 

1. Safe, fireproof, pollution-free, can run directly in the load center;

2. Adopting domestic advanced technology, it has high mechanical strength, strong short-circuit resistance, small local discharge, good thermal stability, high reliability and long service life;

3. Low loss, low noise, obvious energy-saving effect, maintenance-free;

4. Good heat dissipation performance, strong overload capacity, and forced air cooling can improve the operating capacity;

5. Good moisture-proof performance, adaptable to high humidity and other harsh environments;

6. Dry transformers can be equipped with perfect temperature detection and protection systems. Adopting an intelligent signal temperature control system, it can automatically detect and display the respective working temperature of the three-phase windings. It can automatically start and stop the fan, and has alarm, tripping and other functional settings;

7. It is small in size, light in weight, occupies less space, and has low installation cost.