Specifies characteristic dimensions and the number of fixing holes. Applies to small built-in motors such as those usually intended for use in control devices. Dimensions which are not labelled in the standard shall be in accordance with the requirements
IEC 60072-3:1994 history
1994IEC 60072-3:1994 Dimensions and output series for rotating electrical machines; part 3: small built-in motors; flange numbers BF10 to BF50