This standard is applicable to d.c. and three-phase a.c. machines with shaft heights 56 mm and higher and a rated power up to 50 MW at nominal speeds from 600 rev/min up to and including 3600 rev/min - For vertical machines this standard is only applicable to those machines that are measured in a state of free suspension and it excludes those that exceed a shaft height of 400 mm - This standard is not applicable to machines mounted in situ three-phase commutator motors single-phase machines, three-phase machines operated on single-phase systems water power generators permanent magnet generators or to machines coupled to their prime movers or driven loads (The shaft height of a machine without feet or a machine with raised feet or any vertical machine is to be taken as the shaft height of a machine in the same basic frame but of the horizontal shaft foot-mounting type IM B3 (see IEC Publication 34-7: Rotating Electrical Machines - Part 7: Symbols for Types of Construction and Mounting Arrangements of Rotating Electrical Machinery
Registration number (WIID)
53725
Scope
This standard is applicable to d.c. and three-phase a.c. machines with shaft heights 56 mm and higher and a rated power up to 50 MW at nominal speeds from 600 rev/min up to and including 3600 rev/min - For vertical machines this standard is only applicable to those machines that are measured in a state of free suspension and it excludes those that exceed a shaft height of 400 mm - This standard is not applicable to machines mounted in situ three-phase commutator motors single-phase machines, three-phase machines operated on single-phase systems water power generators permanent magnet generators or to machines coupled to their prime movers or driven loads (The shaft height of a machine without feet or a machine with raised feet or any vertical machine is to be taken as the shaft height of a machine in the same basic frame but of the horizontal shaft foot-mounting type IM B3 (see IEC Publication 34-7: Rotating Electrical Machines - Part 7: Symbols for Types of Construction and Mounting Arrangements of Rotating Electrical Machinery
