API 546 3rd edition - making Synchronous Machines better

API 546 3^rd edition was written by users, consultants and manufacturers to provide a common performance standard for large Synchronous Machines. The standard is designed as a stand alone document listing the requirements of all aspects of a synchronous machine. When compared to earlier editions, this edition has various enhancements designed to make it easier to purchase or specify a more durable machine. It has new requirements in some areas such as excitation systems, frame vibration and insulation tests; plus improved sections concerning dynamic analysis and thermally induced vibration changes. To reduce the risk of confusion, it is required to be used with the supplied data sheets.