IEC 61972:2002
Superseded
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Method for determining losses and efficiency of three-phase cage induction motors
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
10-01-2008
English - French
22-11-2002
Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Test requirements
4.1 Power supply
4.2 Instrumentation
4.3 Limits of uncertainty
5 Test procedure
5.1 General
5.2 Temperature of machine before test
5.3 Tests under load
5.4 No-load test at variable voltage
6 Determination of efficiency
6.1 General
6.2 No-load losses
6.3 Additional-load losses
6.4 Reference coolant temperature corrections
6.5 Efficiency
6.6 Efficiency at specific load points
Annex A (informative) Recommended form for calculation of
motor efficiency
Annex B (informative) Linear regression analysis
Annex C (normative) Correction of dynamometer torque readings
Figures
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