1、IECNORMEINTERNATIONALEINTERNATIONALSTAN DARDCEIIEC604491973AMENDEMENT 1AMENDMENT 11979-05Amendement 1Domaines de tensionsdes installations lectriques des btimentsAmendment 1Voltage bandsfor electrical installations of buildings IEC 1979 Droits de reproduction rservs Copyright-all rights reservedInte
2、rnational Electrotechnical Commission?3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300?e-mail:inmailiec.ch?IEC web site http:/www.iec.chCommission Electrotechnique InternationaleInternational Electrotechnical CommissionMcHpyHapogHan 3neKTpoTexHH4ecnaq HOMHccHA?CODE PRIXPRICE CODEPour prix,v
3、oir catalogue en vigueurFor price,see current catalogueBLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2-Page 41.Domaine dapplicationRemplacer le premier alina existant par le suivant:La prsente norme sapplique aux installations lectr
4、iques des btiments alimentes en courantalternatif sous une frquence non suprieure 60 Hz et sous une tension nominale au plus gale 1 000 V,ou en courant continu sous une tension nominale au plus gale 1 500 V.Publication 449 mod.1(mai 1979).Supprimer la note 2.Page 63.Domaines de tensionsModifier le t
5、itre de cet article et de len-tte du tableau I en:Domaines de tensions en courant alternatifAjouter le nouvel article 4 suivant:4.Domaines de tensions en courant continuLes domaines de tensions dans lesquels doivent tre classes les installations selon leur tensionnominale sont dfinis dans le tableau
6、 II:pour les systmes relis directement la terre(paragraphe 2.2),par les valeurs de la tension entreun ple et la terre et entre deux ples;pour les systmes non relis directement la terre(paragraphe 2.3),par la valeur de la tensionentre deux ples.TABLEAU IIDomaines de tensions en courant continuDomaine
7、sSystmes relis directement a la terreSystmes non relis directement la terre*Entre ple et terreEntre plesEntre plesIUG 120U 120UG 120II120 U 900120 U G 1 500120 U G 1 500U=tension nominale de linstallation(volts).*Si le compensateur est distribu,les matriels aliments entre ple et compensateur sont ch
8、oisis de tellemanire que leur isolation corresponde la tension entre ples.Notes 1.Les valeurs de ce tableau se rfrent au courant continu lisse.2.Cette classification des domaines de tensions nexclut pas la possibilit dintroduire des limites interm-diaires pour certaines rgles dinstallation.Publicati
9、on 449 mod.1(mai 1979)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.3 Page 5.ScopeReplace the existing first paragraph by the following:This standard applies to a.c.electrical installations of buildings supplied at a frequency notexc
10、eeding 60 Hz and at a nominal voltage up to and including 1 000 V and to d.c.electricalinstallations of buildings supplied at a nominal voltage up to and including 1 500 V.Publication 449 Amend.1(May 1979)Delete Note 2.Page 73.Voltage bandsAmend the title of this clause and the heading of Table Ito
11、read:A.C.voltage bandsAdd the following new Clause 4:4.D.C.voltage bandsD.C.voltage bands in which the installations shall be classified according to their nominal voltageare given in Table II:for earthed systems(Sub-clause 2.2),by the values of the voltages between pole and earth andbetween poles;f
12、or isolated or not effectively earthed systems(Sub-clause 2.3),by the value of the voltagebetween poles.TABLE IID.C.voltage bandsBandsEarthed systemsIsolated or not effectivelyearthed systemsPole to earthBetween polesBetween polesIUL 120UG 120UL 120II120 U G 900120 U1 500120 U L 1 500U=nominal volta
13、ge of the installation(volts).*If a middle wire is distributed,electrical equipment supplied between poles and middle wire is to be chosenso that its insulation corresponds to the voltage between poles.Notes 1.The values of this table relate to ripple-free d.c.2.This classification of voltage bands
14、does not exclude the possibility of introducing intermediate limits forsome particular rules.Publication 449 Amend.1(May 1979)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.ICS 29.020;91.140.50Typeset and printed by the IEC Central OfficeGENEVA,SWITZERLANDLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.
