Heat-resistant insulation systems for motors

The thermal stability of a new magnet wire known as Alkanex* wire has been evaluated as a component of heat-resistant motor insulation by four different test methods. Alkanex wire has been shown to possess approximately a 40 degrees centigrade (C) superiority in thermal stability as compared to Formex ® wire when used with suitable varnish systems. It is important to choose varnish and solvent systems which are compatible with the wire enamel. It is concluded by test that Alkanex wire can be used in equipment operating at class B temperature and that use need not await confirmation by long service trials.