Table of Contents

FOREWORD<br>INTRODUCTION<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 General requirements<br>5 General notes on tests<br>6 Ratings<br>7 Classification<br>8 Marking and other information<br>9 Protection against electric shock<br>10 Change of input voltage setting<br>11 Output voltage and output current under load<br>12 No-load output voltage<br>13 Short-circuit voltage<br>14 Heating<br>15 Short circuit and overload protection<br>16 Mechanical strength<br>17 Protection against harmful ingress of dust, solid <br>&nbsp;&nbsp;&nbsp;objects and moisture<br>18 Insulation resistance, dielectric strength and <br>&nbsp;&nbsp;&nbsp;leakage current<br>19 Construction<br>20 Components<br>21 Internal wiring<br>22 Supply connection and other external flexible <br>&nbsp;&nbsp;&nbsp;cables or cords<br>23 Terminals for external conductors<br>24 Provisions for protective earthing<br>25 Screws and connections<br>26 Creepage distances, clearances and distances <br>&nbsp;&nbsp;&nbsp;through insulation<br>27 Resistance to heat, fire and tracking<br>28 Resistance to rusting <br>Annex A (normative) - Measurement of creepage <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;distances and clearances<br>Annex B (normative) - Testing a series of transformers<br>Annex C (normative) - Creepage distances (cr), <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;clearances (cl) and distances through <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;insulation (dti) Material group II <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(400 <= CTI < 600)<br>Annex D (normative) - Creepage distances (cr), <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;clearances (cl) and distances through insulation <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(dti) Material group I (CTI >= 600)<br>Annex E (normative) - Glow-wire test<br>Annex F (normative) - Requirements for manually <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;operated switches which are parts of <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transformers assembly <br>Annex G (normative) - Tracking test<br>Annex H (normative) - Electronic circuits <br>Annex I (void)<br>Annex J (normative) - Measuring network for <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;touch-currents<br>Annex K (normative) - Insulated winding wires <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for use as multiple layer insulation<br>Annex L (informative) - Routine tests (production tests) <br>Annex M (informative) - Examples to be used <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;as a guide for 19.1<br>Annex N (informative) - Examples of points of <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;application of test voltages<br>Annex O (void) <br>Annex P (informative) - Examples of points of <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;measurement of creepage distances and <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;clearances<br>Annex Q (informative) - Explanation of IP <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;numbers for degrees of protection <br>Annex R (normative) - Explanations of the <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;application of 4.1.1.2.1 of IEC 60664<br>Annex S (void) <br>Annex T (void) <br>Annex U (informative) - Optional t[w]-marking of <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transformers<br>Annex V (informative) - Symbols to be used for <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;thermal cut-outs<br>Annex W (normative) - Coated printed circuit boards <br>Bibliography<br>Index of defined terms

Abstract

Pertains to safety aspects of power transformers, power supplies, reactors and similar products such as electrical, thermal and mechanical safety.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Canadian Standards Association
ProductNote	Reconfirmed EN
Pages
ISBN