IEC_621_1__1987.pdf

NORME INTERNATIONALE INTERNATIONAL STANDARD Commission Electrotechnique Internationale I n terna tiona I Electrotec h n ica I Com mission MeircAyHapoAHaR 3newpoTexHmecIcas KoiumcciiR Installations lectriques pour chantiers extrieurs soumis des conditions svres(y compris mines ciel ouvert et carrires)Premire partie:Domaine dapplication et dfinitions,Electrical installations for outdoor sites under heavy conditions(including open-cast mines and quarries)Part 1:Scope and definitions CE1 IEC 621-1 Deuxime dition Second edition 1987 miblication 621-1:1987 Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I E C b 2 1 PTUL 87 484L1871 0b41L17 7 W Rvision de la prsente publication Le contenu technique des publications de la CE1 est constamment revu par la Commission afin dassurer quil reflte bien ltat actuel de ia technique.Les renseignements relatifs ce travail de rvision,ltablissement des ditions rvises et aux mises jour peuvent tre obtenus auprs des Comits nationaux de la CE1 et en consultant les documents ci-dessous:O Bulletin de la CE1 O Annuaire de la CE1 O Catalogue des publications de la CE1 Publi annuellement Terminologie En ce qui concerne la terminologie gnrale,le lecteur se reportera la Publication 50 de la CE I:Vocabulaire Electro-technique International(VEI),qui est tablie sous forme de cha-pitres spars traitant chacun dun sujet dfini,lIndex gnral tant publi sparment.D e s dtails complets sur le VE1 peu-vent tre obtenus sur demande.Les termes et dfinitions figurant dans la prsente publication ont t soit repris du VEI,soit spcifiquement approuvs aux fins de cette publication.Symboles graphiques et littraux Pour les symboles graphiques,symboles littraux et signes dusage gnral approuvs par la CE I,le lecteur consultera:-la Publication 27 de la CE I:Symboles littraux utiliser en lectrotechnique:-la Publication 617 de la CEI:Symboles graphiques pour schmas.Les symboles et signes contenus dans la prsente publication ont t soit repris des Publications 27 ou 617 de la CEI,soit spcifiquement approuvs aux fins de cette publication.Publications de la CE1 tablies par le mme Comit dEtudes Lattention du lecteur est attire sur le deuxime feuillet de la couverture,qui numre les publications de la CE1 prpares par le Comit#Etudes qui a tabli la prsente publication.Revision of this publication The technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information on the work of revision,the issue of revised editions and amendment sheets may be obtained from IEC National Committees and from the following I E C sources:O IEC Bulletin O IEC Yearbook O Catalogue of I E C Publications Published yearly Terminology For general terminology,readers are referred to I EC Publication 50:International Electrotechnical Vocabulary(IEV),which is issued in the form of separate chapters each dealing with a specific field,the General Index being published as a separate booklet.Full details of the IEV will be supplied on request.The terms and definitions contained in the present publication have either been taken from the IEV or have been specifically approved for the purpose of this publication.Graphical and letter symbols For graphical symbols,and letter symbols and signs approved by the I EC for general use,readers are referred to:-I E C Publication 27:Letter symbols to be used in electrical technology;-I EC Publication 617:Graphical symbols for diagrams.The symbols and signs contained in the present publication have either been taken from IEC Publications 27 or 617,or have been specifically approved for the purpose of this publication.IE C publications prepared by the same Technical Committee The attention of readers is drawn to the back cover,which lists I EC publications issued by the Technical Committee which has prepared the present publication.Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NORME INTERNATIONALE INTERNATIONAL STANDARD Commission Electrotechnique Internationale International Electrotechnical Commission Meirc,qyHapoflHaH 3nercTpoTexHasecEaH KOMHCC Installations lectriques pour chantiers extrieurs soumis des conditions svres(y compris mines ciel ouvert et carrires)Premire partie:Domaine dapplication et dfinitions Electrical installations for outdoor sites under heavy conditions(including open-cast mines and quarries)Part 1:Scope and definitions O CH 1987 Droits de reproduction rservs-Copyright-all rights reserved Aucune partie de cette publicatiwi ne peut tre reproduite ni utilise sous quelque forme que ce sait et par anum pmed,lectmnique w mcanique,y wmws ia photocopie et les rnicrolrns,sans amrd crit de lditeur.No part of t h i s publication may be repmduced or utilized in any fwm or by any