Testing of large motors to API 542 and 546 standards

The API 541 and 546 standards address the design, testing, and performance of AC induction motors larger than 250 HP and AC synchronous motors larger than 500 HP. A summary of requirements for testing large AC motors to these specifications as well as an overview of the testing facilities and methods necessary to address these requirements are provided. Testing of special-purpose motors requiring more stringent tests is specifically addressed. The additional test requirements specified by the API standards, especially with regard to balance and vibration, are examined. In order to satisfactorily test large machines to the present and forecast needs of the petroleum industry, a test facility with a capacity of approximately 50 MVA is assumed