IEC 60072-1:1991 pdf free download.Dimensions and output series for rotating electrical machines – Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080.
Abstract:Covers most industrial rotating electrical machines within the dimension range: Foot-mounted: shaft heights 56 mm to 400 mm. Flange-mounted: pitch circle diameter of flange 55 mm to 1080 mm. Gives fixing dimensions, shaft extension dimensions and output powers. Maximum permissible torques for continuous duty on a.c. motors are also listed for various shaft diameters.
1. Scope
This part of IEC 72 covers the majority of rotating electrical machines for industrial purposes within the dimension range:
Foot-
mounted: — shaft-heights: 56 mm to 400 mm Flange- mounted: — pitch circle diameter of flange: 55 mm to 1080 mm
It gives tables of fixing dimensions, shaft extension dimensions and output powers. Maximum permissible torques for continuous duty on a.c. motors are listed for various shaft diameters.
NOTE — The dimensions for machines with shaft heights 355 mm and 400 mm, given in this standard, are included among the values given in IEC 72-2.
4. Locad.n of the terminal box
4.1 Machines with feet
The terminal box on a motor shall be situated with its centre-line within a sector ranging from the top to 100 below the horizontal centre-line of the motor on the right-hand side, when looking at the D-end of the motor. No recommendation is decided upon for generators.
It is recommended that unless the terminal box is on the top, motors be so constructed that the terminal box may be located on the left-hand side by the manufacturer, if requested by the user at the time when the motor is ordered.
NOTE — Provision should preferably be made so as to enable the cable entry to the terminal box to be in any one of four directions at right angles.