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Info iec61439 6 ed1 0 b This is a preview - click here to buy the full publication INTERNATIONAL STANDARD IEC - Edition - NORME INTERNATIONALE Low-voltage switchgear and controlgear assemblies ?? Part Busbar trunking systems busways Ensembles d'appareilla

This is a preview - click here to buy the full publication INTERNATIONAL STANDARD IEC - Edition - NORME INTERNATIONALE Low-voltage switchgear and controlgear assemblies ?? Part Busbar trunking systems busways Ensembles d'appareillage à basse tension ?? Partie Systèmes de canalisation préfabriquée INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS PRICE CODE CODE PRIX X ISBN - - - - Warning Make sure that you obtained this publication from an authorized distributor Attention Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale 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 ?cations Routine veri ?cations Annexes Annex C informative Speci ?cation schedule Annex D informative Design veri ?cation Annex AA informative Voltage drop of the system Annex BB informative Phase conductor characteristics Annex CC informative Fault-loop zero-sequence impedances Annex DD informative Fault-loop resistances and reactances Annex EE informative Determination of the magnetic ?eld in the vicinity of the BTS Bibliography Figure ?? Mechanical load test of a straight unit Figure ?? Mechanical load test of a joint Figure ?? Test arrangement for veri ?cation of a ?re-barrier BTU Figure BB ?? Phase conductors characteristics determination Figure CC ?? Fault loop zero-sequence impedances determination Figure DD ?? Fault loop resistances and reactances determination Figure EE ?? Magnetic ?eld measurement arrangement Table ?? Rated diversity factor for a tap-o ? unit Table ?? Phase conductor characteristics Table ?? Fault-loop characteristics Table ?? Characteristics to be used for fault currents calculations Table ?? Conditioning for the thermal cycling test Table C ?? User speci ?cation schedule Table D ?? Design veri ?cations C - ? IEC This is a preview - click here to buy the full publication ?? ?? INTERNATIONAL ELECTROTECHNICAL COMMISSION LOW- VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES ?? Part Busbar trunking systems busways 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