1、NORMEINTERNATIONALEINTERNATIONALSTANDARDCEIIEC255-21-3Premire ditionFirst edition1993-09Relais lectriques Partie 21:Essais de vibrations,de chocs,de secousseset de tenue aux sismes applicables aux relaisde mesure et aux dispositifs de protection Section 3:Essais de tenue aux sismesElectrical relays
2、Part 21:Vibration,shock,bump and seismic testson measuring relays and protection equipment Section 3:Seismic testsIECNumro de rfrenceReference numberCEI/IEC 255-21-3:1993LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Validit de la prs
3、ente publicationLe contenu technique des publications de la CEI est cons-tamment revu par la CEI afin quil reflte ltat actuel dela technique.Des renseignements relatifs la date de reconfirmation dela publication sont disponibles auprs du Bureau Central dela CEI.Les renseignements relatifs ces rvisio
4、ns,ltablis-sement des ditions rvises et aux amendements peuventtre obtenus auprs des Comits nationaux de la CEI etdans les documents ci-dessous:Bulletin de la CEIAnnuaire de la CEIPubli annuellementCatalogue des publications de la CEIPubli annuellement et mis jour rgulirementTerminologieEn ce qui co
5、ncerne la terminologie gnrale,le lecteur sereportera la CEI 50:Vocabulaire Electrotechnique Inter-national(VEI),qui se prsente sous forme de chapitresspars traitant chacun dun sujet dfini.Des dtailscomplets sur le VEI peuvent tre obtenus sur demande.Voir galement le dictionnaire multilingue de la CE
6、I.Les termes et dfinitions figurant dans la prsente publi-cation ont t soit tirs du VEI,soit spcifiquementapprouvs aux fins de cette publication.Symboles graphiques et littrauxPour les symboles graphiques,les symboles littraux et lessignes dusage gnral approuvs par la CEI,le lecteurconsultera:la CEI
7、 27:Symboles littraux utiliser enlectro-technique;la CE I 417:Symboles graphiques utilisablessur le matriel.Index,relev et compilation desfeuilles individuelles;la CEI 617:Symboles graphiques pour schmas;et pour les appareils lectromdicaux,la CEI 878:Symboles graphiques pourquipements lectriques en
8、pratique mdicale.Les symboles et signes contenus dans la prsente publi-cation ont t soit tirs de la CEI 27,de la CEI 417,de laCEI 617 et/ou de la CEI 878,soit spcifiquement approuvsaux fins de cette publication.Publications de la CEI tablies par lemme comit dtudesLattention du lecteur est attire sur
9、 les listes figurant la finde cette publication,qui numrent les publications de laCEI prpares par le comit dtudes qui a tabli laprsente publication.Validity of this publicationThe technical content of IEC publications is kept underconstant review by the IEC,thus ensuring that the contentreflects cur
10、rent technology.Information relating to the date of the reconfirmation of thepublication is available from the IEC Central Office.Information on the revision work,the issue of revisededitions and amendments may be obtained from IECNational Committees and from the following IECsources:IEC BulletinIEC
11、 YearbookPublished yearlyCatalogue of IEC publicationsPublished yearly with regular updatesTerminologyFor general terminology,readers are referred to IEC 50:International Electrotechnical Vocabulary(IEV),which isissued in the form of separate chapters each dealingwith a specific field.Full details o
12、f the IEV will besupplied on request.See also the IEC MultilingualDictionary.The terms and definitions contained in the present publi-cation have either been taken from the IEV or have beenspecifically approved for the purpose of this publication.Graphical and letter symbolsFor graphical symbols,and
13、 letter symbols and signsapproved by the IEC for general use,readers are referred topublications:IEC 27:Letter symbols to be used in electricaltechnology;IEC 417:Graphical symbols for use onequipment.Index,survey and compilation of thesingle sheets;IEC 617:Graphical symbols for diagrams;and for medi
14、cal electrical equipment,I EC 878:Graphical symbols for electromedicalequipment in medical practice.The symbols and signs contained in the present publicationhave either been taken from IEC 27,IEC 417,IEC 617and/or IEC 878,or have been specifically approved for thepurpose of this publication.IEC pub
15、lications prepared by the sametechnical committeeThe attention of readers is drawn to the end pages of thispublication which list the IEC publications issued by thetechnical committee which has prepared the presentpublication.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATI
16、ON ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.CODE PRIXPRICE CODENNORME?CEIINTERNATIONALE?IECINTERNATIONAL?255-21-3STANDARD?Premire ditionFirst edition1993-09Relais lectriques Partie 21:Essais de vibrations,de chocs,de secousseset de tenue aux sismes applicables aux relaisde mesure et aux dispositifs de protection-Section 3:Essais de tenue aux sismesElectrical relays Part 21:Vibration,shock,bump and seismic testson measuring relays and protection equipment Section 3:Seismic tests CEI 1993 Droits de rep
