IEEE C57.12.90 2010
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IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers
| Published By | Publication Date | Number of Pages |
| IEEE | 2010 | 100 |
Revision Standard – Active. Methods for performing tests specified in IEEE Std C57.12.00(TM) 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 measurements, polarity and phase-relation tests, ratio tests, no-load loss and excitation current measurements, impedance and load loss measurements, dielectric tests, temperature tests, short-circuit tests, audible sound level measurements, and calculated data.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C57.12.90-2010 Front cover |
| 3 | Title page |
| 6 | Introduction |
| 7 | Notice to users Laws and regulations Copyrights Updating of IEEE documents Errata Interpretations Patents |
| 8 | Participants |
| 11 | Contents |
| 13 | Important notice 1. Overview 1.1 Scope |
| 14 | 1.2 Purpose 1.3 Word usage 2. Normative references |
| 15 | 3. Definitions |
| 16 | 4. General 4.1 Types of tests 4.2 Test requirements 4.3 Test sequence 4.4 Instrumentation |
| 17 | 5. Resistance measurements 5.1 Determination of cold temperature 5.2 Conversion of resistance measurements |
| 18 | 5.3 Resistance measurement methods |
| 19 | 5.4 Resistance measurement connections and reporting |
| 20 | 6. Polarity and phase-relation tests 6.1 Subtractive and additive polarity |
| 21 | 6.2 Polarity tests: single-phase transformers |
| 23 | 6.3 Polarity and phase-relation tests: polyphase transformers |
| 26 | 7. Ratio tests 7.1 General 7.2 Tolerances for ratio |
| 27 | 7.3 Ratio test methods |
| 28 | 8. No-load losses and excitation current 8.1 General |
| 29 | 8.2 No-load loss test |
| 31 | 8.3 Waveform correction of no-load losses |
| 32 | 8.4 Temperature correction of no-load losses 8.5 Determination of excitation (no-load) current |
| 33 | 8.6 Frequency conversion of no-load losses and excitation current 9. Load losses and impedance voltage 9.1 General 9.2 Factors affecting the values of load losses and impedance voltage |
| 34 | 9.3 Tests for measuring load losses and impedance voltage |
| 40 | 9.4 Calculation of load losses and impedance voltage from test data |
| 43 | 9.5 Zero-phase-sequence impedance |
| 47 | 10. Dielectric tests 10.1 General |
| 49 | 10.2 Switching impulse test procedures |
| 50 | 10.3 Lightning impulse test procedures |
| 56 | 10.4 Routine impulse test for distribution transformers |
| 59 | 10.5 Low-frequency tests 10.6 Applied-voltage tests |
| 60 | 10.7 Induced-voltage tests for distribution and Class I power transformers |
| 61 | 10.8 Induced-voltage test for Class II power transformers |
| 62 | 10.9 Partial discharge measurement 10.10 Insulation power-factor tests |
| 64 | 10.11 Insulation resistance tests |
| 65 | 11. Temperature-rise tests 11.1 Test methods |
| 67 | 11.2 Resistance measurements |
| 68 | 11.3 Temperature measurements |
| 71 | 11.4 Correction of temperature-rise test results |
| 72 | 12. Short-circuit tests 12.1 General |
| 73 | 12.2 Test connections |
| 74 | 12.3 Test requirements |
| 75 | 12.4 Test procedure |
| 76 | 12.5 Proof of satisfactory performance |
| 77 | 13. Audible sound emissions 13.1 General |
| 78 | 13.2 Instrumentation |
| 79 | 13.3 Test conditions |
| 80 | 13.4 Microphone positions |
| 82 | 13.5 Sound power rating |
| 85 | 13.6 Presentation of results |
| 89 | 14. Calculated data 14.1 Reference temperature 14.2 Losses and excitation current |
| 90 | 14.3 Efficiency 14.4 Voltage regulation of a constant-voltage transformer |
| 93 | Annex A (informative) Partial discharge measurement using radio-influence voltage instrumentation and its failure detection |
| 95 | Annex B (normative) 50/60 Hz frequency conversion of measured performance parameters |
| 100 | Annex C (informative) Bibliography |
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