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The importance, benefits of preheating motor windings prior to impregnation

Publication date: 
May 2002
Author(s): 
Tom Bishop, P.E., EASA Senior Technical Support Specialist
Type of media: 
Article

Did you ever wonder if the preheating instructions from solvent varnish and solventless resin (hereafter we'll use the term "resin" when it applies to both) manufacturers were really all that important? The short answer is, yes, they are. Here we'll expand on some of the reasons that preheating is a key step in the winding process.

Topic(s): 
Winding insulation
Repair procedures and tips
Service center equipment