Table of Contents

Foreword<br>Preface<br>General Plan of the Standard<br>Chapter I: General Requirements<br>1. Scope and object<br>2. Definitions<br>3. General requirements<br>4. General notes on tests<br>5. Rating<br>6. Classification<br>7. Marking<br>8. Protection against electric shock<br>9. Change of input voltage setting<br>10. Output voltage and output current under load<br>11. No-load output voltage<br>12. Short-circuit voltage<br>13. Heating<br>14. Short-circuit and overload protection<br>15. Mechanical strength<br>16. Protection against harmful ingress of water and moisture<br>17. Insulation resistance and electric strength<br>18. Construction<br>19. Components<br>20. Internal wiring<br>21. Supply connection and external flexible cables and cords<br>22. Terminals for external conductors<br>23. Provision for protective earthing<br>24. Screws and connections<br>25. Creepage distances and clearances<br>26. Resistance to heat, abnormal heat, fire and tracking<br>27. Resistance to rusting<br>Appendix I-A - Production tests<br>Appendix I-B - Void <br>Appendix I-C - Examples of points of application of test <br>voltages<br>Appendix I-D - Measurement of creepage distances and <br>clearances<br>Appendix I-E - Examples of points of measurement of <br>creepage distances and clearances<br>Chapter II: Particular Requirements for Special Separating <br>Transformers<br>Section One - Control Transformers<br>1. Scope and Object<br>2. Definitions<br>7. Marking<br>9. Change of input voltage setting<br>10. Output voltage and output current under load<br>11. No-load output voltage<br>13. Heating<br>17. Insulation resistance and electric strength<br>25. Creepage distances and clearances<br>Section Two - Ignition Transformers for Gas and Oil Burners<br>1. Scope and object<br>2. Definitions<br>4. General notes on tests<br>5. Rating <br>6. Classification<br>7. Marking<br>8. Protection against electric shock<br>10. Output voltage and output current under load<br>11. No-load output voltage<br>13. Heating <br>14. Short-circuit and overload protection<br>16. Protection against harmful ingress of water and moisture<br>17. Insulation resistance and electric strength<br>18. Construction<br>25. Creepage distances and clearances<br>Appendix II-B - Void <br>Appendix II-B - Measurement of leakage current for ignition<br>transformers for gas and oil burners<br>Section Three - High Insulation Level Transformers and <br>Separating Transformers with Working Voltage Above 1 000 V<br>1. Scope and object<br>2. Definitions<br>7. Marking<br>10. Output voltage and output current under load<br>11. No-load output voltage<br>17. Insulation resistance and electric strength<br>25. Creepage distances and clearances<br>Section Four - Stray Field Transformers<br>Under consideration<br>Section Five - Stabilizing Transformers (Current and Voltage <br>Types)<br>Under consideration<br>Chapter III: Particular Requirements for Autotransformers<br>1. Scope and object<br>2. Definitions<br>5. Rating<br>7. Marking<br>8. Protection against electric shock<br>10. Output voltage and output current under load<br>17. Insulation resistance and electrical strength<br>25. Creepage and clearance distances<br>26. Resistance to heat, abnormal heat, fire and tracking<br>Appendix III-A - Production tests<br>Chapter IV: Supplementary Specifications for Variable <br>Transformers<br>1. Scope and object<br>2. Definitions<br>6. Classification<br>7. Marking<br>8. Protection against electric shock<br>10. Output voltage and output current under load<br>11. No-load output voltage<br>13. Heating<br>15. Mechanical strength<br>18. Construction<br>21. Supply connection and external flexible cables and cords<br>25. Creepage distances and clearances<br>Appendix IV-A - Tests during production<br>Chapter V: Supplementary Particular Requirements for Reactors<br>Under consideration<br>Figures

Abstract

Applies to stationary or portable, single-phase or polyphase, air-cooled separating transformers, autotransformers, variable transformers and small reactors, associated or not, and have a rated supply voltage of not more than 1 000 V a.c., a rated frequency of not more than 500 Hz, a rated no-load or load output voltage of not more than 15 kV a.c. or d.c. and a rated output not exceeding 1 kVA for single-phase transformers, 2 kVAR for single-phase reactors, 5kVA for polyphase transformers and 10 kVAR for polyphase reactors, unless stated otherwise in the relevant chapters.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN
Committee	TC 96
Superseded By	IEC 61558-1 : 3.0 IEC 61558-2-13 : 2.0 IEC 61558-2-14 : 1ED 2012 IEC 61558-2-2 : 2.0 IEC 61558-2-1 : 2.0 I.S. EN 61558-1 : 2006 I.S. EN 61558-2-1 : 2007 IEC 61558-2-10 : 1ED 2014