Abstract :
IN dealing with electric equipment, the engineer is concerned with three basic components that constitute the end product, namely: mechanical and structural parts, electric conductors, and electrical insulating materials. It is this latter element that challenges the ability of the electrical engineer and chemist, in the development of insulating materials that will improve in reliability with the concurrent development of materials intended for long life at elevated temperatures. Whether or not the performance for which the insulation is designed can be realized during industrial production must be determined by adequate test methods standards.
