IS 14578 : 1999 Three-phase induction motors for use in nuclear power plants

1 Scope

1.1 This standard covers three-phase induction motors forvoltages up to and including 11 000 volts having windings withClass B, Class F and Class C insulation (see IS 1271) for use inNuclear Power Plants. The motors specified in this standard areassigned any one of the ratings specified in 9.4.

1.2 Motors within the scope of this standard for use on systemsemploying non-preferred voltages and frequencies shall beconsidered as complying with this standard provided that theycomply in all other respects with this standard. The voltages andfrequency for which they are designed shall be stated on the ratingplate.

1.3 In addition to this standard, the motor shall comply with IS325 in cases where no specific requirement is given in thisstandard.

2 References

List of Referred Indian Standard

IS 5 :1978Colours for ready mixedpaints and enamels

IS 325 :1996Three-phase inductionmotors

IS 900 :1992Code of practice forinstallation andmaintenance of inductionmotors

IS 1076 :1985Preferred numbers

IS 1231 :1974Dimensions of three-phasefoot mounted inductionmotors

IS 1271 :1985Thermal evaluation andclassification ofelectrical insulation

IS 1885 : Part 35 :1993Electrotechnicalvocabulary :Part 35 Rotating machines

IS 2223 :1993Dimensions of flangemounted ac induction motors

IS 3043 :1987Code of practice forearthing

IS 4029 :1967Guide for testingthree-phase inductionmotors

IS 4691 :1985Degrees of protectionprovided by enclosure forrotating electricalmachinery

IS 4728 :1975Terminal marking anddirection of rotation forrotating electricalmachinery

IS 6362 :1971Designation of methods ofcooling of rotatingelectrical machines

IS 8223 :1976Dimensions and outputratings for foot-mountedelectrical machines withframe number 355 to 1 080

IS 12065 :1987Permissible limits ofnoise levels in rotatingelectrical machines

IS 12075 :1996Mechanical vibration ofrotating electricalmachines withshaft-heights 56 mm andhigher measurements,evaluation and limits ofvibration severity

IS 12360 :1988Specification for voltagebands for electricalinstallations includingpreferred voltages andfrequency

IS 12802 :1982Temperature-risemeasurement of rotatingelectrical machines

IS 13529 :1992Guide on effects ofunbalanced voltages on theperformance of three-phasecage induction motors

IS 13947 : Part 4 : Sec 1 :1993LV switchgear andcontrolgear:Part 4 Contractor andmotor starters,Section 1 Electromechanical

IS 14222 :1994Impulse voltage withstandlevels of rotating acmachines with form-woundstator coils