Endicott Coil Company, Inc.

Vacuum Impregnating of Wound-Copper Coils

Vacuum Impregnating of Wound-Copper Coils

Endicott Coil Company, Inc. produces vacuum impregnated wound copper coils for customers who need to protect their coil from the environment as well eliminating moisture from the coil. Because this process requires little tooling it can be a cost-effective alternative to molding or encapsulating. We place the wound copper coils in a vacuum pressure impregnation tank, which removes the air and moisture and replaces it with a varnish or epoxy impregnant. We matched the resin to customer requirements for a variety of properties, such as chemical resistance, moisture resistance and dielectric characteristics. The process also required curing the pieces in a temperature controlled oven.

These coils are subject to stringent quality processes that included gage dimensioning as well as Hipot and surge testing as well as produced to tolerances of ±0.005″.