An introduction to american petroleum industry standard API 547 for 250 - 3000 HP motors

This paper discusses the new American Petroleum Institute API 547 general-purpose form-wound squirrel cage induction motors-250 horsepower and larger. API 547 was modeled after IEEE 841 and meant to establish a standard for 250-3000 horsepower motors for general-purpose use and be less complicated than API 541. Medium voltage TEFC versions of API 547 motors should provide a robust motor suitable for the pulp and paper industry just as the 841 standard does today. Electrical and mechanical standards were selected for general-purpose use as in the IEEE 841 standard but also incorporate many of the more severe requirements from API 541