IEC 61972:2002 pdf free download

IEC 61972:2002 pdf free download Method for determining losses and efficiency of three-phase cage induction motors
This International Standard is applicable to three-phase cage induction motors and establishestwo methods for determination of efficiency:
Method 1: for motors tested by using a torque measurement device，with additional load
losses derived from measurements;
Method 2: for motors tested without torque measurement，with assigned additional loadlosses.
The two methods are different in the procedure to obtain the additional load losses.Unlessotherwise specified, method 1 should be used for motors up to 150 kW.
For other methods of efficiency estimation, see lEC 60034-2.
2Normative references
The following referenced documents are indispensable for the application of this document.Fordated references, only the edition cited applies. For undated references, the latest edition ofthe referenced document (including any amendments) applies.
IEC 60034-1，Rotating electrical machines – Part 1: Rating and performance
IEC 60034-2:1972,Rotating electrical machines – Part 2: Methods for determining losses andefficiency of rotating electrical machinery from tests (excluding machines for traction vehicles)Amendment 1 (1995)
Amendment 2 (1996j
IEC 60044 (all parts),Instrument transformers
IEC 60051-1,Direct acting indicating analogue electrical measuring instruments and theiraccessories -Part 1: Definitions and general requirements common to all parts
IEC 60279,Measurement of the winding resistance of an a.c. machine during operation atalternative voltage
3 Terms, definitions and symbols
3.1Terms and definitions
For the purposes of this document,the terms and definitions given in IEC 60034-1 and inIEC 6o034-2, as well as the following, apply.
3.1.1
pertes dans le fer
pertes dans le fer actif et pertes à vide additionnelles dans d’autres parties métalliques
3.1.2
pertes supplémentaires en charge
a) pertes engendrées par le courant de charge dans le fer actif et dans d’autres parties
métalliques, à l’exception des conducteurs
b) pertes par courants de Foucault dans les conducteurs des enroulements primaire ou
secondaire dues à des pulsations de flux dépendant du courant
NOTE Dans certains pays, ces pertes sont également connues sous l’appellation de perte de charge parasite.