1、I E C 255 PT*8 90 W 4844893 0302312 8 W NORME I NTE R NATI O NALE I NTE RNATI ONAL STANDARD CE1 IEC 255-8 Deuxime dition Second edition 1990-09 Relais lectriques Huitime partie:Relais lectriques thermiques Electrical relays Part.8:Thermal electrical relays Numro de rfrence Reference number CEMEC 255
2、-8:1990 Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Rvision de la prsente publication Revision of this publication Le contenu technique des publications de la CE i est con
3、stam-ment revu par la Commission afin dassurerquil reflte bien ltat actuel de la technique.The technical content of i EC publications is kept under con-stant review by the I EC,thus ensuring that the content reflects current technology.Les renseignements relatifs ce travail de rvision,ltablis-sement
4、 des ditions rvises et aux mises jour peuvent tre obtenus auprs des Comits nationaux de la CE I et en consultant les documents ci-dessous:Information on the work of revision,the issue of revised edi-tions and amendment sheets may be obtained from I EC National Committees and from the following i EC
5、sources:Bulletin de la CE I I EC Bulletin Annuaire de ia CE I IECYearbook Catalogue des publications de la CE I Publi annuellement Catalogue of I EC Publications Published yearly Terminologie Terminology En ce qui concerne la terminologie gnrale,le lecteur se repor-tera la Publication 50 de la CE i:
6、Vocabulaire Electrotechnique International(VEI).qui est tablie sous forme de chapitres spars traitant chacun dun sujet dfini.lIndex gnral tant publi spa-rment.Des dtails complets sur le VEi peuvent tre obtenus sur demande.Les termes et dfinitions figurant dans la presente publication ont t soit repr
7、is du VEI.soit spcifiquement approuvs aux fins de cette publication.Symboles graphiques et littraux Pour les symboles graphiques,symboles littraux et signes dusage general approuvs par la CE I,le lecteur consultera:-t-la Publication 27 de la CEI:Symboles littraux utiliser en lectrotechnique:la Publi
8、cation 617 de la CEI:Symboles graphiques pour schmas.es symboles et signes contenus dans la prsente publication ont soit repris des Publications 27 ou 61 7 de la CE I,soit spcifi-quement approuvs aux fins de cette publication.Publications de la CE I tablies par le mme Comit dEtudes Lattention du lec
9、teur est attire sur le deuxime feuillet de la couverture.qui numre les publications de la CE I prpares par le Comit dEtudes qui a tabli la prsente publication.For general terminology,readers are referred to I EC Publi-cation 50:International Electrotechnical Vocabulary(IEV).which is issued in the fo
10、rm 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
11、 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 EC Publication 27:Letter symbols to be used in electrical-I EC Publication 617:Graphical symbols for diagrams.technolog
12、y;The symbols and signs contained in the present publication have either been taken from I EC Publications 27 or 617,or have been specifically approved for the purpose of this publication.I EC publications prepared by the same Technical Committee The attention of readers is drawn to the back cover,w
13、hich 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-,-,-IEC 255 PT*8 90 M 484
14、4841 0102314 1 NORME I NTE RNATIONALE I NTE R NAT I O N AL STANDARD CE1 IEC 255-8 Deuxime dition Second edition 1990-09 Relais lectriques Huitime partie:Relais lectriques therm i q ues Electrical relays Part 8:Thermal.electrical relays O CE1 1990 Droits de reproduction rservs-Copyright-all rights re
15、served Aucune partie de cette publication ne peut tre reproduite ni No pari of this publication may be reproduced or utilized in utilise sousquelque forme quecesoit et paraucun prod,any form or by any means,eiectronicor mechanical,including lectronique ou m&nique,y compris la photocopie et les photo
16、copying,and microfilm,without permission in writing microfilms,sans laccord crit de iditeur.from the publisher.Bureau Central de la Commission Electrotechnique Internationale 3,rue de Varemb Genve,Suisse Q CODE PRIX Commission Electrotechnique Internationale PRICE CODE International Electrotechnical Commission MeHnyHapOHafl3neporexHreca HOMHCCHR Pourpix,voircatalogue en vhueur For pice,see current catalogue Copyright International Electrotechnical Commission Provided by IHS under license with IE