SN EN 61050 : 1992 AMD 1 1995

Cooperating organizations<br>National foreword<br>Foreword<br>Section 1 - General requirements<br>1 General<br>1.1 Scope<br>1.2 Normative references<br>2 Definitions<br>3 General requirements<br>4 General notes on tests<br>5 Rating<br>6 Classification<br>7 Marking<br>Section 2 - Safety requirements<br>8 Electrical characteristics<br>9 Magnitude influence<br>10 Heating<br>11 Endurance<br>12 Degrees of protection<br>13 Voltage across series capacitors<br>14 Moisture resistance<br>15 Insulation resistance and electric strength<br>16 Construction<br>17 Connection of the conductors<br>18 Provision for earthing<br>19 Screws, current-carrying parts and connections<br>20 Creepage distances and clearances<br>21 Insulating materials<br>22 Resistance to corrosion<br>Annexes<br>A Information on wiring rules<br>B Transformers with connecting leads<br>C Guidance for conformity of production tests<br>ZA (normative) Other international publications <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;quoted in this standard with the references of the <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;relevant European publications<br>Figures<br>National annex NA (informative) Original IEC text <br>&nbsp;&nbsp;amended by CENELEC common modifications<br>National annex NB (informative) Committees responsible<br>National annex NC (informative) Cross-references

Applies to built in and independent single phase transformers with separate input and output windings for use on a.c. supply up to 1,000 V to 50 Hz or 60 Hz, to stabilise and supply cold cathode tubular lamps (or assemblies of such lamps) having a no load rated output voltage over 1,000 V but not over 10,000 V and meant for electric advertising signs, lighting, light signals and similar purposes. Does not apply to auto transformers and electronic convertors. May serve as a guide for transformers with applications other than those specified in the scope, such as instance transformers for photographic lamps, as long as they are not the subject of a particular IEC standard and their characteristics remain within the framework of those specified in the scope.