Electrical insulations systems-`A total package´

The advantages of a total-package approach to electrical insulation systems are described. Total package systems offer today´s manufacturer a large choice of bobbin materials, interwinding materials, magnet wires, and varnishes of all types, as well as a multitude of minor components. It is noted that choosing one of these systems can save the manufacturer of transformers, motors, solenoids, relays, or power supplies not only much of the testing costs but also time getting the product to the marketplace. Particular emphasis is placed on Du Pont´s total-package approach, which has sought to meet the following key electrical manufacturer requirements: IEC and UL recognition of the systems; systems available in most temperature classes; systems using the most up-to-date ingredients (as well as the old proven standbys); the widest possible choices of major and minor components; ingredients obtainable on a global basis; and free authorization to use these systems