VPI System Overview
We are equipped with 8 foot and 12 foot diameter VPI tanks and maintain strict quality control standards. Our QC program includes maintaining clean tanks, resin temperature, quarterly resin testing, vacuum pumps and control panel.
Our Vacuum Pressure Impregnation (VPI) System is a better method than the older method of "dip and bake." It is used for many applications ranging from insulations to sealants. VPI provides 100% solid mass structure, not to mention that solvent varnishes lose 50% to 70% of volume during baking. According to numerous field audits since 1975, VPI has, for all practical purposes, eliminated field failures caused by voltage tracking*.
*EASA, Electrical Apparatus Service Association, Inc.
Benefits
- Strengthens the insulation system and extends service life.
- Eliminates the dead air spaces that cause hot spots within coils.
- Provides a low thermal resistance path that lowers temperatures.
- Creates a repellent to oily substances, moisture, and chemical contaminants.
- Resin becomes a sealant against environmental conditions and creates bonds for good mechanical strength.
- Reduces mechanical vibrations.
- Reduces the audible noise level.
- Enhances the dielectric capability, which allows for higher voltage stress levels without failure.
- Reduces coil movement.
Process
VPI creates a better product in less time and at a lower cost than other available procedures that aim at the same results. With VPI, you will have completely upgraded mechanical strength, a cooler running motor due to superior heat dissipation, and environmental protection.
Media and Links
http://www.vonroll.comDetails: Read more about the resins and varnishes used during the Vacuum Pressure Impregnation (VPI) process.
