Vacuum Pressure Impregnation

Vacuum Pressure Impregnation

Vacuum Pressure Impregnation (VPI) is a process in which a wound resin-poor winding is completely submerged in a resin. Through a combination of dry and wet vacuum and pressure cycles, the resin is absorbed into the semi-porous insulation to result in a completed winding that is theoretically void free. The VPI process is also used in low voltage machines for winding integrity and heat transfer improvement. M&C uses the VPI process throughout its product and service range, from LV to HV.

M&C use three VPI insulation systems ensuring the correct insulation system for the specific motor and application:

Advantages of using the VPI system are as follows:

Cost effective and faster processing time than the resin-rich insulation system