A large motor insulation system that withstands severe contaminants

One of the first practical industrial applications of electric power some 75 years ago was a motor turning a shaft. Both the magnitude and diversity of motor applications have since had a tremendous growth, and in the more recent years this trend has been increasing rather than diminishing. In many industries, particularly the chemical industry, the environment in which the motor must operate has appreciably changed as new products have been developed and placed in production. Unfortunately, many of these environments have had a detrimental effect on the electrical insulation necessitating either frequent replacement or more extensive protection of the windings.