IEC 61972:2002
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Method for determining losses and efficiency of three-phase cage induction motors
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
English - French
22-11-2002
10-01-2008
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
Establishes two 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 load losses.
| DocumentType |
Standard
|
| Pages |
39
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Superseded
|
| SupersededBy |
| 08/30165047 DC : DRAFT JUNE 2008 | BS EN ISO 9906 - ROTODYNAMIC PUMPS - HYDRAULIC PERFORMANCE ACCEPTANCE TESTS |
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| IEC 60034-2:1972 | Rotating electrical machines. Part 2: Methods for determining losses and efficiency of rotating electrical machinery from tests (excluding machines for traction vehicles) |
| IEC 60044-4:1980 | Instrument transformers - Part 4: Measurement of partial discharges |
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