Organo-Silicon Compounds for Insulating Electric Machines

The general problem of electrical insulation is reviewed in relation to silicone insulating materials. Silicone compounds are described and their chemical and physical characteristics discussed. Thermal stability and moisture resistance of silicone insulation are compared to that of conventional class-A and class-B insulation. Predictions are made as to the field of usefulness of silicones in electrical insulation. Recommendations are made for widespread investigation to evaluate the over-all advantages of this new type of insulation.