1. BS EN IEC 60072-1. Dimensions and output series for rotating electrical machines. Part 1. Frame numbers 56 to 400 and flange numbers 55 to 1080 (5th June 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (25 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗