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BS 4999-102:1987

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

General requirements for rotating electrical machines Methods for determining losses and efficiency from tests (excluding machines for traction vehicles)
Available format(s)

Hardcopy , PDF

Superseded date

10-15-1999

Language(s)

English

Published date

02-27-1987

Foreword
Committees responsible
Methods
Section one - General
1. Scope
2. Object
3. General
4. Definitions
5. Reference temperature
Section two - D.C. machines
6. Losses to be included
7. Determination of efficiency
Section three - Polyphase induction machines
8. Losses to be included
9. Determination of efficiency
Section four - Synchronous machines
10. Losses to be included
11. Determination of efficiency
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
Table
1. Multiplying factors for different speed ratios
Figures
Appendix
A. IEC 34-2A Measurement of losses by the calorimetric
     method
Introduction
Section one - General
1. General
2. Determination of losses P1 by measurement of the
    volume rate of flow and rise in temperature of the
    cooling medium
3. Losses P1 measured electrically using the
    calorimetric calibration method
4. Stable conditions
5. Losses P2 not transmitted to the cooling medium
6. Losses external to the reference surface Pe
Section two - Water as the cooling medium
7. Application and basic relationship
8. Measurement of water flow
9. Measurement of the temperature rise of the water
10. Measuring accuracy
Section three - Air as the cooling medium
11. Application and basic relationship
12. Determination of the mass rate of flow
13. Measurement of the temperature rise of the air
14. Determination of the specific heat capacity of
    the air
15. Measuring accuracy
Section four - Practical considerations
16. Preparations for calorimetric measurements with
    liquid coolants
17. Connections and equipment for calorimetric measure-
    ments with liquid coolants
Tables
I. Measurement error in calorimetry by water
II. Measurement error in calorimetry by air
Figures

Details calibrated machine test, zero power factor test, retardation method, electrical back-to-back test and calorimetric test.

Committee
PEL/2
DocumentType
Standard
Pages
44
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

Standards Relationship
IEC 60034-2:1972 Identical
IEC 60034-2A:1974 Identical

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BS 4999-101:1987 General requirements for rotating electrical machines Specification for rating and performance
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BS 4999-101:1987 General requirements for rotating electrical machines Specification for rating and performance

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