Recent developments in impregnation technology

Low-temperature resin impregnation technology, using trickle application, has been widely adopted over the past few years. Industry experience has now confirmed predictions of improved service life, lower cost and reduced air emissions. The same electrical insulating resins have also increased productivity in standard roll-through and dip-and-bake operations. Recent enhancements to this technology include the use of mineral fillers and UV tracers. Tight control over preheat temperatures and resin reactivity also allows varnish application to stationary, rather than rotating parts