IEEE C57.12.90 1993
$72.04
IEEE Standard Test Code for Liquid-Immersed Distribution, Power and Regulating Transformers and IEEE Guide for Short-Circuit Testing of Distribution and Power Transformers
| Published By | Publication Date | Number of Pages |
| IEEE | 1993 | 116 |
Revision Standard – Inactive – Superseded. Replaced by IEEE Std C57.12.90-1999 (SH/SS94778) Abstract: Methods for performing tests specified in IEEE Std C57.12.00-1993, IEEE Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers, and other standards applicable to liquid-immersed distribution, power, and regulating transformers are described. Instrument transformers, step-voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, specialty transformers, grounding transformers, and mine transformers are excluded. This standard covers resistance measurement, polarity and phase-relation tests, ratio tests, no-load-loss and excitation current measurements, impedance and loadloss measurements, dielectric tests, temperature tests, short-circuit tests, and audible-sound-level measurements.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | Title page |
| 3 | Introduction Participants |
| 7 | CONTENTS |
| 10 | Part I: IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers 1. Scope 2. References |
| 12 | 3. Terminology |
| 13 | 4. General 4.1 Types of tests 4.2 Test requirements 4.3 Purpose 4.4 Test sequence |
| 14 | 4.5 Instrumentation 5. Resistance measurements 5.1 Determination of cold temperature 5.2 Conversion of resistance measurements |
| 15 | 5.3 Resistance measurement methods |
| 16 | 6. Polarity and phase-relation tests 6.1 Subtractive and additive polarity 6.2 Polarity tests: Single-phase transformers |
| 18 | 6.3 Polarity and phase-relation tests: Polyphase transformers |
| 22 | 7. Ratio tests 7.1 General 7.2 Tolerances for ratio 7.3 Ratio test methods |
| 24 | 8. No-load losses and excitation current 8.1 General |
| 25 | 8.2 No-load loss test |
| 27 | 8.3 Waveform correction of no-load losses |
| 28 | 8.4 Temperature correction of no-load losses 8.5 Determination of excitation (no-load) current |
| 29 | 9. Load losses and impedance voltage 9.1 General 9.2 Factors affecting the values of load losses and impedance voltage |
| 30 | 9.3 Tests for measuring load losses and impedance voltage |
| 36 | 9.4 Calculation of load losses and impedance voltage from test data |
| 39 | 9.5 Zero-phase-sequence impedance |
| 42 | 10. Dielectric tests 10.1 General |
| 44 | 10.2 Switching impulse test procedures |
| 45 | 10.3 Lightning impulse test procedures |
| 49 | 10.4 Routine impulse test for distribution transformers |
| 51 | 10.5 Low-frequency tests |
| 52 | 10.6 Applied voltage tests 10.7 Induced voltage tests for distribution and Class I power transformers |
| 53 | 10.8 Induced voltage test for Class II power transformers |
| 54 | 10.9 Partial discharge measurement |
| 55 | 10.10 Insulation power-factor tests |
| 58 | 10.11 Insulation resistance tests |
| 59 | 11. Temperature rise 11.1 Ambient temperature measurement |
| 60 | 11.2 Liquid rise measurement 11.3 Average winding temperature-rise measurement |
| 62 | 11.4 Other temperature measurements 11.5 Test methods |
| 65 | 11.6 Correction of temperature rises for differences in altitude 12. Short-circuit tests 12.1 Scope |
| 66 | 12.2 Test connections |
| 67 | 12.3 Test requirements |
| 68 | 12.4 Test procedure |
| 69 | 12.5 Proof of satisfactory performance |
| 70 | 13. Audible sound emissions 13.1 General |
| 71 | 13.2 Instrumentation |
| 72 | 13.3 Test conditions |
| 74 | 13.4 Microphone positions |
| 75 | 13.5 Sound power rating |
| 77 | 13.6 Presentation of results |
| 79 | 14. Calculated data 14.1 Reference temperature 14.2 Losses and excitation current |
| 80 | 14.3 Efficiency 14.4 Voltage regulation of a constant-voltage transformer |
| 87 | 15. Bibliography |
| 88 | Annex to Part I—Minimum information to be included in certified tes data 0.1 Minimum information to be included in certified test data |
| 90 | Part II: IEEE Guide for Short-Circuit Testing of Distribution and Power Transformers 1. Scope 2. Short-circuit testing techniques 2.1 Fault application |
| 91 | 2.2 Test connections 2.3 Duration of test |
| 93 | 2.4 Number of tests 2.5 Calibration tests |
| 95 | 2.6 Voltage and current measurements |
| 97 | 3. Failure-detection techniques 3.1 Voltage and current waveshapes |
| 98 | 3.2 Leakage impedance 3.3 Excitation current 3.4 Low-voltage impulse (LVI) testing |
| 105 | 3.5 Visual inspection 3.6 Dielectric tests 4. Analysis of test results 4.1 Terminal measurements |
| 107 | 4.2 Visual inspection |
| 115 | 4.3 Dielectric tests 5. Bibliography |
| 116 | Annex to Part II—Essential information for inclusion in transformer short-circuit test reports A.1 Essential information for inclusion in transformer short-circuit test reports |
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