VACUUM PRESSURE IMPREGNATION - VPI

Vacuum Pressure Impregnation is a process where Acutran completely seals a coil through pressure and a resin.

The process is as follows:

  • Coil(s) are placed in a vacuum chamber and a dry vacuum cycle takes place, drawing all of the air and moisture out of the coil windings. Air pockets, over time, can lead to insulation deterioration.
  • A resin is introduced into the chamber and a wet pressure cycle forces the resin into the coil(s) layers. This allows a complete saturation of the entire winding.
  • Then the coil(s) are baked out to seal the resin, forming a hard protection around the windings and insulation. 

 

The benefits of a Vacuum Pressured Impregnation:

  • Improved dielectrics allowing a higher resistance to ground failures
  • Greater mechanical strength
  • Seals windings against moisture and foreign contaminants
  • Improves heat dissipation

Improved corona and/or partial discharge levels

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