1990IEC 60072-2:1990 Dimensions and output series for rotating electrical machines; part 2: frame numbers 355 to 1000 and flange numbers 1180 to 2360
1970IEC 60072-2:1967 Dimensions and output ratings of electrical machines - Part 2: Dimensions of mounting flanges
1970IEC 60072-2:1960 Recommendations for the dimensions and output ratings of electric motors - Part 2: Dimensions of mounting flanges for electric motors