Functional evaluation of mica products

For many years, the evaluation of mica products for electrical machinery other than actual field service has been largely limited to a short time dielectric strength test. This naturally resulted in rather slow acceptance of new materials and undoubtedly held back progress with many new product developments. We cannot afford the time to live with this type of evaluation in the modern era of rapid technical developments. Neither can we afford to build production units to evaluate ever new material that holds promise of improved properties and lower cost.