GB/T 4772.2-1999 Dimensions and output series for rotating electrical machines. Part 2: Frame numbers 355 to 1000 and flange numbers 1180 to 2360 (English Version)
This standard applies to all types of horizontal rotating electrical machines of one of the following three specialized types—foot-down motors, foot-up motors, and motors with one-piece base plates, as well as motors with mounting flanges and with center heights converted to base Motors with a foot down type of 355-1000mm and a fixed flange base circle diameter of 1180-2360mm.
GB/T 4772.2-1999 history
1999GB/T 4772.2-1999 Dimensions and output series for rotating electrical machines. Part 2: Frame numbers 355 to 1000 and flange numbers 1180 to 2360