01588nam 2200373 450 99627974990331620231206214254.01-5044-0402-510.1109/IEEESTD.1981.7431909(CKB)3710000000613070(NjHacI)993710000000613070(EXLCZ)99371000000061307020231206d1981 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierANSI/IEEE Std 620-1981 (Issued April 1981 for trail use) IEEE Trial Use Guide for Construction and Interpretation of Thermal Limit Curves for Squirrel-Cage Motors Over 500 hp /Institute of Electrical and Electronics EngineersPiscataway, NJ, USA :IEEE,1981.1 online resource (8 pages)This guide defines thermal limit curves, recommends a standard procedure for construction of the curves, and provides the definitions and information necessary to properly use these curves. The guide also describes thermal limit curves for large squirrel-cage motors defined as those motor ratings built in frames larger than the frame normally used for 500 hp, 1800 r/min motors.ANSI/IEEE Std 620-1981 Insulation (Heat)Heat engineeringStandardsInsulation (Heat)Heat engineeringStandards.621.46NjHacINjHaclDOCUMENT996279749903316ANSI2072434UNISA