Design considerations for large AC motors to comply with API standard 541 Second Edition-special purpose motors

API standard 541 Second Edition, is a comprehensive specification that addresses the design, testing, and performance of AC induction motors larger than 250 horsepower. The authors examine the advantages and disadvantages of purchasing a motor under this specification, and describe the resulting impact on costs and deliveries. It is noted that the value of the specification, to the user, is to provide a better quality motor than was previously available as a standard product, significantly reduce the length of the procurement negotiations by including the major user-specified items in the specification, and reduce the cost and delivery time of this type of motor by standardizing most of the specification requirements.<>