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This is a preview - click here to buy the full publication INTERNATIONAL STANDARD IEC - Edition - NORME INTERNATIONALE Low-voltage switchgear and controlgear assemblies ?? Part Power switchgear and controlgear assemblies Ensembles d'appareillage à basse tension ?? Partie Ensembles d'appareillage de puissance INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale PRICE CODE CODE PRIX T ISBN - - - - CThis is a preview - click here to buy the full publication ?? ?? - ? IEC CONTENTS FOREW ORD Scope Normative references Terms and de ?nitions Symbols and abbreviations Interface characteristics Information Service conditions Constructional requirements Performance requirements Design veri ?cation Routine veri ?cation Annex AA informative Forms of internal separation see Annex BB informative Items subject to agreement between the ASSEMBLY manufacturer and the user Bibliography Figure AA ?? Symbols used in Figures AA and AA Figure AA ?? Forms and Figure AA ?? Forms and Table ?? Values of assumed loading Table ?? Test voltages across the open contacts of equipment suitable for isolation Table ?? Electrical conditions for the di ?erent positions of withdrawable parts Table ?? Forms of internal separation Table BB ?? Items subject to agreement between the ASSEMBLY manufacturer and the user CThis is a preview - click here to buy the full publication - ? IEC ?? ?? INTERNATIONAL ELECTROTECHNICAL COMMISSION LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES ?? Part Power switchgear and controlgear assemblies FOREWORD The International Electrotechnical Commission IEC is a worldwide organization for standardization comprising all national electrotechnical committees IEC National Committees The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic ?elds To this end and in addition to other activities IEC publishes International Standards Technical Speci ?cations Technical Reports Publicly Available Speci ?cations PAS and Guides hereafter referred to as ??IEC Publication s ? Their preparation is entrusted to technical committees any IEC National Committee interested in the subject dealt with may participate in this preparatory work International governmental and nongovernmental organizations liaising with the IEC also participate in this preparation IEC collaborates closely with the International Organization for Standardization ISO in accordance with conditions determined by agreement between the two organizations The formal decisions or agreements of IEC on technical matters express as nearly as possible an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense While all reasonable e ?orts are made to ensure that the technical content of IEC Publications is accurate IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user In order to promote international uniformity IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications Any divergence between