Rotor turn insulation: Analysis and development

The work described here was carried out over several veal´s. It resulted in the development of a Class F (155 °C) insulation system, as well as gained fundamental knowledge of turn insulation capabilities. The simulated service test described here was a basic part of this program and established itself as an outstanding tool for determining system performance. The detailed conclusions of this work were: 1. Bond strength of the insulation systems or their binders to copper was established as a means of estimating the systems´ simulated service test performance. 2. The epoxy resins tested, with their high copper bond strength and compression resistance, proved to be excellent binders for rotor turn insulation and improvements over the phenolics, and polyesters tested.