Critical-material conservation in induction-motor manufacture

Present Importance of Avoiding Over-Motoring IN several articles which recently have appeared in the technical press, it has been indicated that, in the interests of the war effort, standards of reliability in service may have to be compromised. As an example, one author advocates that electric motors should, in some cases, be utilized with continuous loads 25 per cent greater than has been considered good practice heretofore, “particularly if the ambient temperature within which the motors are expected to operate, is less than the recognized permissible maximum of 104 degrees Fahrenheit.” That author adds the caution that this may not be practicable in all cases, since other factors than the continuous thermal rating sometimes determine the motor size. Then he adds: “However, in most war plants, such cases are relatively few.”