IEC 60034-2:1972

Contents
Foreword
Preface
Clause
Section One - General
1. Scope
2. Object
3. General
    3.1 List of symbols
4. Definitions
    4.1 Efficiency
    4.2 Total loss
    4.3 Breaking test
    4.4 Calibrated driving machine test
    4.5 Mechanical back-to-back test
    4.6 Electrical back-to-back test
    4.7 Retardation test
    4.8 Calorimetric test
    4.9 No-load test
    4.10 Open-circuit test
    4.11 Sustained short-circuit test
    4.12 Zero power factor-test
5. Reference temperature
Section Two - D.C. Machines
6. Losses to be included
    6.1 Excitation circuit losses
    6.2 Constant losses
    6.3 Load losses
    6,4 Additional load losses
7. Determination of efficiency
    7.1 Summation of losses
    7.2 Total loss measurement
Section Three - Polyphase Induction Machines
8. Losses to be included
    8.1 Constant losses
    8.2 Load losses
    8.3 Additional load losses
9. Determination of efficiency
    9.1 Summation of losses
    9.2 Total loss measurement
Section Four - Synchronous Machines
10. Losses to be included
    10.1 Constant losses
    10.2 Load losses
    10.3 Excitation circuit losses
    10.4 Additional load losses
11. Determination of efficiency
    11.1 Summation of losses
    11.2 Total loss measurement
Section Five - Methods of Test
12. General
13. Calibrated machine test
14, Zero power factor test
15. Retardation method
16. Electrical back-to-back test
17. Calorimetric test
18. Schedule of preferred tests
    18.1 D.C. machines
    18.2 Polyphase induction machines
    18.3 Synchronous machines
Figures
Annex A - Provisional methods for determining losses and
          efficiency of converter-fed cage induction
          machines

Applies to d.c. machines and to a.c. synchronous and induction machines. The principles can be applied to other types of machines such as rotary converters, a.c. commutator motors and single-phase induction motors for which other methods of determining losses are used.