Introduction to API 547 2nd edition

This paper will review many of the changes in the 2nd Edition of API 547, General-purpose Form-wound Squirrel Cage Induction Motors 185 kW (250 hp) through 2240 kW (3000 hp) [1]. The 1st Edition of this standard [2] was released in 2005 to provide a set of requirements for general-purpose motors based on the key criteria of API 541 4th Edition, applicable to 375 kW (500 hp) motors and larger [3]. The scope of API 547 is limited to a range of motor sizes and configurations that fit a majority of general-purpose severe duty applications common in petrochemical applications. API 541 has recently been updated to its 5th Edition [4], and the 2nd Edition of API 547 has followed suit with revisions to scope and criteria, various clarifications, datasheet changes and an expanded datasheet guide.