IEC_60158-3-1985_scan.pdf

18COMMISSION ELECTROTECHNIQUE INTERNATIONALENORME DE LA CEIINTERNATIONAL ELECTROTECHNICAL COMMISSIONIEC STANDARDPublication 158-3Premiere edition-First edition1985Appareillage de commande a basse tensionTroisieme partie:Prescriptions complementaires pour contacteurssujets a certificationLow-voltage controlgearPart 3:Additional requirements for contactors subjectto certificationCEI 1985Droits de reproduction reserves-Copyright-all rights reservedAucune partie de cete publication ne peut etre reproduite ni utilise sous quelque forme No pent of this publication may be reproduced or utized in any form or by any means,que ce soit et per aucun procede,electronique ou mecanique,y compris le photocopie electronic or mechanical,including photocopying and microfilm,without permision inet les microfilms,sans laccord ecrit de Iediteur.wniting from the publisher.Bureau Central de la Commission Electrotechnique Internationale3,rue de VarembeGeneve,SuisseIECPrixNOL.toPriceFr.s.46.-158-31EC19853CONTENTSPage5FOREWORD,:,。5PREFACE.Clausel.General.12.Definitions.3.Classification.74.Characteristics of contactors.5.Nameplates.06.Standard conditions for operation in service.97.Standard conditions for construction.98.Tsts13APPENDIX A-Information to be given by the user when conditions for operation inservice differ from the standard.29APPENDIX B-Clearances and creepage distances for low-voltage contactors.:.29APPENDIX C-Protection of a contactor by a short-circuit protective device.29APPENDIX D-Conventional test circuit for verification of making and breakingcapacities for categories AC-1 to AC-4 and DC-1 to DC-5.29APPENDIX AA-Impact test apparatus.31APPENDIX BB-Test series to be carried out and number of samples to be submitted forcertification purposes,35158-3IEC1985-5-INTERNATIONAL ELECTROTECHNICAL COMMISSIONLOW-VOLTAGE CONTROLGEARPart 3:Additional requirements for contactors subjectto certificationFOREWORD1)The formal decisions or agreements of the IEC on technical matters,prepared by Technical Committees on which allthe National Committees having a special interest therein are represented,express,as nearly as possible,aninternational consensus of opinion on the subjects dealt with.2)They have the form of recommendations for international use and they are accepted by the National Committees inthat sense.3)In order to promote international unification,the IEC expresses the wish that all National Committees should adoptthe text of the IEC recommendation for their national rules in so far as national conditions will permit.Anydivergence between the IEC recommendation and the corresponding national rules should,as far as possible,beclearly indicated in the latter.PREFACEThis standard has been prepared by Sub-Committee 23E:Circuit-breakers and SimilarEquipment for Household Use,of IEC Technical Committee No.23:Electrical Accessories.It forms the first edition of IEC Publication 158-3 and should be used in conjunction withIEC Publication 158-1:Low-voltage Controlgear,Part 1:Contactors.The text of this standard is based upon the following documents:Six MonthsRuleReport on VotingTwo MonthsProcedureReport on Voting23E(C0)1523E(C0)15A23E(C0)1723E(C0)2023E(C0)30Further information can be found in the Reports on Voting indicated in the table above.The following IEC publications are quoted in this standard:Publications Nos.73(1984):Colours of Indicator Lights and Push-buttons.144(1963):Degrees of Protection of Enclosures for Low-voltage Switchgear and Controlgear.158-1(1970):Low-voltage Controlgear,Part 1:Contactors.212(1971):Standard Conditions for Use Prior to and During the Testing of Solid ElectricalInsulating Materials.337-1(1970):Control Switches(Low-voltage Switching Devices for Control and Auxiliary Circuits,Including Contactor Relays,Part 1:General Requirements).695-2-1(1980):Fire Hazard Testing,Part 2:Test Methods,Glow-wire Test and Guidance.158-3IEC 19857-LOW-VOLTAGE CONTROLGEARPart 3:Additional requirements for contactors subjectto certification1.GeneralThis clause of IEC Publication 158-1:Low-voltage Controlgear,Part 1:Contactors,applies except as follows:1.1 ScopeFirst paragraphReplacement:This standard applies to electro-magnetic air-break contactors in accordance with IECPublication 158-1 for which additional requirements are necessary in order to specify in _ sufficient detail certain testing parameters and procedures.Additional notes:3.-The need for additional requirements appears,for example,when contactors have to be tested and certifiedby appropriate testing authorities because of national or other laws or rules.4.-If control switches are incorporated in contactors they shall comply with IEC Publication 337-1:ControlSwitches(Low-voltage Switching Devices for Control and Auxiliary Circuits,Including Contactor Relays),Part 1:General Requirements.2.DefinitionsThis clause of IEC Publication 158-1 applies.3.ClassificationThis clause of IEC Publication 158-1 applies.4.Characteristics of contactorsThis clause of IEC Publication 158-1 applies except as follows:4.3.2.1 Rated conventional thermal currentAdditional note3.-This implies that is higher than or at least equal to the highest stated rated operational current foruninterrupted duty.158-3IEC 19855.NameplatesThis clause of IEC Publication 158-1 applies except as follows:Replacement of the first paragraph:Each contactor shall be provided with a nameplate carrying the following data,markedin a durable manner,and which shall be easily legible and shall not be placed onscrews,removable washers or other removable parts.In addition when the contactor is supplied in an enclosure the IP rating according tothe relevant IEC publication*shall be indicated on the enclosure.The marking of the terminals shall be in accordance with IEC Publication 158-1C.The nameplate shall indicate that the device has been certified according to thisstandard and by what authority it has been thus certified.Alternative ratings according to IEC Publication 158-1 may also be given by themanufacturer even if these have not been certified according to this standard.Addition to Item d):Note.-If the rated operational current is not given on the nameplate,it shall be in the catalogue of themanufacturer together with the assumed relationship between rated operational current and ratedoperational power.Addition before the note:For contactors whose control circuit is intended to be connected to a safety extra-lowvoltage supply:n)suitability of the control circuit to be connected to a safety extra-low voltage supply,the main switching circuit being supplied with a voltage having a value greater thanthat of the safety extra-low voltage.6.Standard conditions for operation in serviceThis clause of IEC Publication 158-1.applies.7.Standard conditions for constructionThis clause of IEC Publication 158-1 applies except as follows:7.1.1 GeneralAddition:Screws or nuts which transmit contact pressure shall be in engagement with a metalthread.*Provisionally IEC Publication 144:Degrees of Protection of Enclosures for Low-voltage SwitchgearandControlgear.