What is Vacuum Pressure Impregnation Process

Vacuum Pressure Impregnation (VPI) is a process by which a fully wound electric apparatus stator or rotor is completely submerged in a Resin/Varnish.

Through a combination of dry and wet vacuum and pressure cycles, the resin is assimilated throughout the insulation system. Once thermally processed, the impregnated windings become a monolithic and homogenous structure.

The resulting benefits are:

• Improved electric motor efficiency
• Higher Dielectric Strength
• Increased Mechanical Strength,
• Greater Thermal Inductivity,
• Reduced probability of motor failure
• Superior Protection against the Ingress of Water, Chemical and Containments.

Types:

1. Manual VPI Plant:

Manual VPI includes, manual lid clamping arrangement, manual operated ball valves and all other process to be operated manually.

2. Semi-Automatic VPI Plant:

Semi-AutomaticVPI plants are designed as per customer’s requirement. A combination of automation and manual operation can be routed as per requirement.

3. Automatic VPI Plant:

Automatic PI Plant includes Automatic Bayonet Lid Lock/Unlock, Up/Down arrangement, Pneumatically operated EP Valvesthrough HMI and PLC systems.