Development of a simulated service test for insulation systems used in turbine-generator rotors

The Generator Rotor Simulated Service Test represents a new and useful method of comparing different slot armor insulation systems in a functional manner. The capability to combine mechanical, electrical and thermal stresses on Iow cost samples of new and aged slot armor constructions has speeded the development and application of new materials. A new type of molded fibrous glass and resin slot armor was shown to be superior and has been successfully adopted for product use. A continuing program of materials evaluation with this facility is underway and yielding valuable data.