ABOUT THE VPI PROCESS
Delom Services has four vacuum pressure impregnation (VPI) tanks in its various workshops, the largest of which has a diameter of 4,9 m and a depth of 3,7 m (16 feet x 12 feet). In the perspective of “REPAIRING ONCE AND FOR ALL,” the Delom Services shops use epoxy-based varnishes with a high viscosity meeting the highest quality winding criteria.
VPI stands for Vacuum Pressure Impregnation. This is a process by which a rotor or fully wound stator of VPI design is submerged in a resin. Through a combination of drying cycles, ABSOLUTE vacuum impregnation, high pressures and polymerizations, the varnishes crawl into all the cavities of the winding, guaranteeing superior performance.
An epoxy-based VPI insulation system meets the four basic needs of durable and efficient winding. It provides an optimal shield for winding in abrasive and dusty environments while also improving the mechanical rigidity of the entire electric motor.
A FULLY INTEGRATED SERVICE
Delom Services is your expert and one-stop shop for critical units and electric motors of all voltages. With one of the largest VPI tanks in North America, we can meet any challenge and offer value-added expertise to any winding project.
Our in-depth knowledge of our customers’ plants, our thorough understanding of the operation of all electric motors, our analysis of root causes of failure, and our expertise in insulation processes allow us to perform the most appropriate and innovative rewinding jobs.
- Huge winding capacity
- Electric motors and generators up to 13.8 kV
- Approach adapted to each condition of operation
- Reverse engineering winding
- Modernization of the insulation system
Our repair and winding works are always customized based on the actual operating conditions.
ADVANTAGES OF A VPI INSULATION SYSTEM
- Optimal protection against corona effect
- Excellent dielectric strength at ground and between turns
- Excellent heat dissipation of the windings
- Improved mechanical stability
- Improved performance in corrosive, abrasive or dusty environments
- Increased MTBRs for winding maintenance in contaminated environments
- Increase the life span of the winding
- Process guaranteeing optimal sealing against moisture and chemicals
- Reduction of the unit’s total cost of ownership (TCO)