Induction motors-design, manufactured and test based on API 541

Generally there are two types of end users of induction motors, i) Basic design based on IEC, NEMA [2] or some other standards and ii) basic design with the addition of the API 541[1] requirement. The second category is mostly used in refinery, power plant, and oil and gas industries where long term reliability is sought. This paper will discuss the basic design, manufacturing and testing and the additional requirements of API 541. In addition, this paper will help answer the following questions: what are API requirements, what benefits do they provide, and is the extra effort necessary or not? Finally it will conclude with the advantages and disadvantages of non API and API motors.