IS 1231-1974

标准号：IS 1231-1974
发布日期：1975/1/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This standard specifies the dimensions for foot-mounted 3-phase50 Hz ac induction motors, of axle height ranging from 56 to 315 mm, intended for general purpose applications. This standard also specifies the standard nominal output for squirrel-cage induction motors having enclosures for type of protection IP 21, IP 22 and IP44 orsuperior (see IS : 4691-1968*) for different frame sizes on the basis of Class 'A', Class 'E' and Class 'B' insulation (see IS: 1271-1958〓) and continuous rating in accordance with IS : 325-1970〓. It also covers the standard outputs and corresponding sizes of frame and shaft for slip ring (wound rotors) continuous rated motors, of axle height ranging from 160 to 315 mm, for a class of insulation not lower than Class 'E' (see IS: 1271-1958〓) and having enclosures for type of protection IP 21, IP 22 and IP 44 or superior (see IS: 4691-1968*) for supply voltage not exceeding 650 volts.