IEC_60158-1B-1979_scan.pdf

C.D.U./U.D.C.:621.316.53.027.2.001.2.001.4.004.12620.169.1:620.179.12:519.23COMMISSION ELECTROTECHNIQUE INTERNATIONALENORME DE LA CEIINTERNATIONAL ELECTROTECHNICAL COMMISSIONIEC STANDARDPublication 158-1B1979Deuxieme complement a la Publication 158-1(1970)Appareillage de commande a basse tensionPremiere partie:ContacteursSecond supplement to Publication 158-1(1970)Low-voltage controlgearPart 1:ContactorsDescripteurs:contacteurs a basse tensionDescriptors:low-voltage contactors.exigences,proprietes.essaisrequirements.properties.mechanicaldendurance mecanique.analyse statistique.endurance tests.statistical analysis.thermometrie des contacteurs.thermometry of conductors.protection contre les courts-circuits.protection against short circuits.Droits de reproduction reserves-Copyright-all rights reservedAucune partie de cte publication ne pe re reproduite ni tilise sous quelqueNop of this publicatin may be repodued rtiiednamy form or by amy means.forme que ce soit et par aucun procode.electronique ou mecanique.y compris iseectroic or mechanical.including photocoying and microfilm without permissionphotocopie et les microfilms.sans Iaccrdit dedr.in writing the publisher.Bureau Central de la Commission Electrotechnique Internationale1.rue de VarembeGeneve,SuissePrix Fr.s.3PricefEdVOL.A-3-INTERNATIONAL ELECTROTECHNICAL COMMISSIONSecond supplement to Publication 158-1(1970)LOW-VOLTAGE CONTROLGEARPart 1:ContactorsFOREWORD1)The formal decisions or agreements of the IEC on technical matters,prepared by Technical Committees on which all the NationalCommittees having a special interest therein are represented,express,as nearly as possible,an international consensus of opinionon the subjects dealt with.2)They have the form of recommendations for international use and they are accepted by the National Committees in that sense.3)In order to promote international unification,the IEC expresses the wish that all National Comnittees should adopt the text oftheIEC recommendation for their national rules in so far as national conditions will permit.Any divergence between the I E C recom-mendation and the corresponding national rules should,as far as possible,be clearly indicated in the latter.PREFACEPart A of this standard has been prepared by Sub-Committee 17B,Low-voltage Switchgear and Controlgear,of IEC TechnicalCommittee No.17.Switchgear and Controlgear.Part A,except new Clauses 4.3.5.3,4.6 and 8.2.8,combines two documents prepared by two different working groups.As concerns the first document,a first draft was circulated in April 1972,according to the decision taken in Brussels in June 1971,and examined in Stockholm in September 1972.A second draft was circulated in April 1975 and discussed in The Hague in September1975.A third draft was circulated in August 1976 and discussed in Moscow in June 1977.The draft,Document 17B(Central Office)97,was submitted to the National Committees for approval under the Six Months Rule in September 1977.The following countries voted explicitly in favour of publication:AustraliaJapanAustriaNetherlandsPolandBelgiumRomaniaBulgariaCanadaSouth Africa(Republic of)DenmarkSpainFinlandSwedenSwitzerlandFranceGermanyTurkeyUnited KingdomIsraelUnited States of AmericaItalyA first draft of the second document was circulated in August 1975,according to the decision taken in Paris in April 1974.A seconddraft was circulated in December 1976 and discussed in Moscow in June 1977.The draft,Document 17B(Central Office)98,wassubmitted to the National Committees for approval under the Six Months Rule in Jaruary 1978.-7-Second supplement to Publication 158-1(1970)LOW-VOLTAGE CONTROLGEARPart 1:Contactors.A-Amendments to Publication 158-1(1970)Page 3CONTENTS4.3 Rated values(Correction to the French text only.)Replace the title of Clause 4.6 by the following:4.6 Protection of a contactor by a short-circuit protection deviceReplace the title of Appendix C by the following:APPENDIX C-Protection of a contactor by a short-circuit protective devicePage 174.1 Summary of characteristics(Correction to the French text only.)4.3 Rated values(Correction to the French text only.)4.3.1 Rated voltages(Correction to the French text only.)4.3.1.1 Rated operational voltages(Correction to the French text only.)4.3.1.2 Rated insulation voltage(Correction to the French text only.)Page 194.3.2 Rated currents(Correction to the French text only.)