However, I can give you a of the IEC 60034 series so you understand what it covers, how it’s structured, and where to legitimately access it.
IEC 60034 is for anyone specifying, buying, or manufacturing industrial motors/generators. Part 1 (rating/performance) and Part 30-1 (efficiency classes) are the most critical. You cannot legally get a free full PDF from the IEC, but you can purchase individual parts online or access them via a corporate standards subscription. iec 60034 pdf